FLOOR OR WALL COVERING

Abstract

A recess is provided at the surface of a floor or wall covering between two panels mechanically coupled to each other by a male coupling part and a female coupling part. The recess may include a first recess cut out or otherwise provided at the female edge through the top layer and extending into the substrate. The recess may have a second recess cut out or otherwise provided at the male edge through the top layer and extending into the substrate. The recess includes a grouting material.

Claims

1.-142. (canceled)

143. A floor or wall covering comprising floor or wall panels; the panels comprise a substrate and a top layer; the top layer comprises a decor layer; and optionally a wear layer; the panels are provided at least at the edges of two opposite sides with coupling parts, cooperating which each other, substantially in the form of male coupling parts and female coupling parts, for coupling the panels to each other in the floor or wall covering; the male coupling part is provided at the male edge of the panels; the female coupling part is provided at the female edge of the panels; optionally the coupling parts are provided with integrated mechanical locking means which prevent the drifting apart of two coupled panels into the direction perpendicular to the surface of the floor or wall covering and/or into the direction perpendicular to the respective edges in the plane of the floor or wall covering; a recess is provided at the surface of the floor or wall covering between two panels mechanically coupled to each other by the male coupling part and the female coupling part, the recess optionally comprises a first recess cut out or otherwise provided at the female edge preferably through the top layer and preferably extending into the substrate; and optionally a second recess cut out or otherwise provided at the male edge preferably through the top layer and preferably extending into the substrate; the recess comprises a grouting material; the floor or wall covering comprises optionally one or a combination of the following aspects I-VI: I: the grouting material is provided on a surface of the male coupling edge substantially parallel with the panel surface as well as on surface of the female coupling edge substantially parallel with the panel surface; preferably, these surfaces substantially parallel with the panel surface are provided at the bottom of the recess; II: the recess comprises the shape of a trapezium, with the two parallel sides of the trapezium provided parallel with the panels; and with the longest side of the two parallel sides closer to the surface level of the panels than the shortest side of the two parallel sides; III. the recess comprises or consists of a surface of the male edge and/or of the female edge having an included angle (α) with the top surface of the panel to which the edge belongs that is less than 90°, preferably less than 85°, and preferably more than 70°; preferably said surface of the male edge and/or said surface of the female edge intersects with the top surface of the panel on which it is provided; IV: below the recess a narrow gap is provided in the substrate between the male edge and the female edge, wherein grout is provided in this narrow gap; preferably the narrow gap is provided between sections of the male edge and of the female edge perpendicular to the surface of the panel; preferably the narrow gap is less than 0.5 mm wide; V: at least one of the female edge or the male edge comprises a protrusion, preferably directed substantially downwards when the panel is put horizontally, wherein the protrusion is preferably provided by removal of material at the bottom of the panel or otherwise provided, e.g. by extrusion; the protrusion makes contact with an element of the other edge—preferably the protrusion makes contact with the distal end of the other edge—thereby locking the panels horizontally in a flexible way; preferably the lower end of the protrusion is provided at the same level as the bottom of the panels; VI: the upper side edges of the recess are provided by surfaces of the male edge and of the female edge that have an included angle (δ) with the top surface of the panel that are substantially equal to 90°.

144. The floor or wall covering as in claim 143, wherein the second recess comprises a first undercut in the male edge; and wherein the first recess comprises a second undercut in the female edge, preferably wherein the first undercut and/or the second undercut have a triangular shape or a shape with a curved edge.

145. The floor or wall covering as in claim 144, wherein the second recess comprises a third undercut in the male edge and/or wherein the first recess comprises a fourth undercut in the female edge, preferably wherein the third undercut and/or the fourth undercut have a triangular shape or a shape with a curved edge.

146. The floor or wall covering as in claim 143, wherein the male coupling parts comprise a tongue, preferably extending in the direction parallel with the panel surface; wherein the female coupling parts comprise a groove, preferably extending in the direction parallel with the panel surface.

147. The floor or wall covering as in claim 146, wherein the largest thickness of the tongue is less than 70% of the largest opening of the groove.

148. The floor or wall covering as in claim 143, wherein the male coupling part is provided by a downward-directed upper hook-shaped part; wherein the downward-directed upper hook-shaped part comprises—and preferably consists of—a lip with a downward-directed locking element which forms a male part; wherein the female coupling part is provided by an upward-directed lower hook-shaped part; wherein the upward-directed lower hook-shaped part comprises—and preferably consists of—a lip with an upward-directed locking element, which, proximally thereof, defines a female part in the form of a third recess; wherein the male coupling part and the female coupling part are configured such that two of such panels can be coupled to each other at their respective edges by means of a movement perpendicular to the surface of the panels of the one panel in respect to the other, such that the panels are locked in the plane of the panels and/or perpendicular to the respective edges.

149. The floor or wall covering as in claim 148, wherein the panels are configured such that the recess extends to a part of the upper surface of the lip of the upward-directed lower hook-shaped part; wherein the grouting material is provided on—and preferably adheres to—part of the upper surface of the lip of the upward-directed lower hook-shaped part.

150. The floor or wall covering as in claim 148, wherein the proximal end of the downward-directed locking element comprises a first inclined contact surface; wherein the proximal end of the upward-directed locking element comprises a second inclined contact surface; wherein in coupled condition of a first panel at the edge comprising the downward-directed locking element, its first inclined contact surface contacts the second inclined contact surface of the panel with which the first panel is coupled at the edge comprising the downward-directed locking element; thereby establishing a locking of the coupled panels in vertical direction.

151. A floor or wall covering comprising floor or wall panels; the panels comprise a substrate and a top layer; the top layer comprises a decor layer; and optionally a wear layer; the panels are provided at least at the edges of two opposite sides with coupling parts, cooperating which each other, substantially in the form of male coupling parts and female coupling parts, for coupling the panels to each other in the floor or wall covering; the male coupling part is provided at the male edge of the panels; the female coupling part is provided at the female edge of the panels; optionally the coupling parts are provided with integrated mechanical locking means which prevent the drifting apart of two coupled panels into the direction perpendicular to the surface of the floor or wall covering and/or into the direction perpendicular to the respective edges in the plane of the floor or wall covering; a recess is provided at the surface of the floor or wall covering between two panels mechanically coupled to each other by the male coupling part and the female coupling part, wherein the male coupling part is provided by a downward-directed upper hook-shaped part; wherein the downward-directed upper hook-shaped part comprises—and preferably consists of—a lip with a downward-directed locking element which forms a male part; wherein the female coupling part is provided by an upward-directed lower hook-shaped part; wherein the upward-directed lower hook-shaped part comprises—and preferably consists of—a lip with an upward-directed locking element, which, proximally thereof, defines a female part in the form of a third recess; wherein the male coupling part and the female coupling part are configured such that two of such panels can be coupled to each other at their respective edges by means of a movement substantially perpendicular to the surface of the panels of the one panel in respect to the other, such that the panels are locked in the plane of the panels and/or perpendicular to the respective edges, wherein the recess comprises a grouting material.

152. The floor or wall covering as in claim 151, wherein in coupled condition of the male coupling part of a panel with the female coupling part of another panel, a locking in vertical direction is provided at the distal end of the downward-directed locking element of the panel.

153. The floor or wall covering as in claim 152; wherein a nose extends from the proximal end of the edge comprising the female coupling part, wherein the nose interacts with the downward-direct locking element of the coupled panel, thereby providing a locking in vertical direction at the distal end of the downward-directed locking element.

154. The floor or wall covering as in claim 153, wherein the vertical locking at the distal end of the downward directed locking element is established at inclined surfaces of the nose and of the downward-directed locking element; preferably wherein in coupled condition the inclined surfaces are in contact with pretension.

155. The floor or wall covering as in claim 153, wherein in coupled condition of two panels, the nose of the first of the coupled panels establishes a first contact surface with the female edge of the second of the coupled panels and a second contact surface with the female edge of the second of the coupled panels, wherein the difference in included angle between the first contact surface and the second contact surface is at least 45°, and preferably at least 75°, more preferably at least 90°; optionally wherein one of the first of second contact surfaces is parallel with the surface of the coupled panels; or wherein one of the first or second contact surfaces is perpendicular to the surface of the coupled panels.

156. The floor or wall covering as in claim 143, wherein the floor or wall covering comprises floor or wall panels; the panels comprise a substrate and a top layer; the top layer comprises a decor layer; and optionally a wear layer; the panels are provided at least at the edges of two opposite sides with coupling parts, cooperating which each other, substantially in the form of male coupling parts and female coupling parts, for coupling the panels to each other in the floor or wall covering; the male coupling part is provided at the male edge of the panels; the female coupling part is provided at the female edge of the panels; optionally the coupling parts are provided with integrated mechanical locking means which prevent the drifting apart of two coupled panels into the direction perpendicular to the surface of the floor or wall covering and/or into the direction perpendicular to the respective edges in the plane of the floor or wall covering; a recess is provided at the surface of the floor or wall covering between two panels mechanically coupled to each other by the male coupling part and the female coupling part, the recess comprises a grouting material; wherein the decor layer ends at the edges of the two opposite provided with coupling parts in the view perpendicular to the surface of the panel along non-linear lines.

157. The floor or wall covering, as in claim 143, wherein the floor or wall covering comprises floor or wall panels; the panels are rectangular, square or oblong, wherein the shortest of the sides is larger than 250 millimeter, preferably larger than 300 millimeter, more preferably larger than 600 millimeter; the panels comprise a substrate and a top layer; the top layer comprises a decor layer; and optionally a wear layer; the panels are provided at least at the edges of a first set of opposite sides with coupling parts, cooperating which each other, substantially in the form of male coupling parts and female coupling parts, for coupling the panels to each other in the floor or wall covering; the male coupling part is provided at the male edge of the panels; the female coupling part is provided at the female edge of the panels; optionally the coupling parts are provided with integrated mechanical locking means which prevent the drifting apart of two coupled panels into the direction perpendicular to the surface of the floor or wall covering and/or into the direction perpendicular to the respective edges in the plane of the floor or wall covering; and, a grouting material is provided around the full circumference of the decor layer of the panels.

158. The floor or wall covering as in claim 143, the panels comprise a substrate and a top layer; the top layer comprises a decor layer; and optionally a wear layer; the panels are provided at least at the edges of two opposite sides with coupling parts, cooperating which each other, substantially in the form of male coupling parts and female coupling parts, for coupling the panels to each other in the floor or wall covering; the male coupling part is provided at the male edge of the panels; the female coupling part is provided at the female edge of the panels; optionally the coupling parts are provided with integrated mechanical locking means which prevent the drifting apart of two coupled panels into the direction perpendicular to the surface of the floor or wall covering and/or into the direction perpendicular to the respective edges in the plane of the floor or wall covering; a recess is provided at the surface of the floor or wall covering between two panels mechanically coupled to each other by the male coupling part and the female coupling part, wherein the recess comprises at both its side surfaces one or more of an undercut or a protrusion; the recess comprises a grouting material.

159. The floor or wall covering as in claim 143, the panels comprise a substrate and a top layer; the top layer comprises a decor layer; and optionally a wear layer; the panels are provided at least at the edges of two opposite sides with coupling parts, cooperating which each other, substantially in the form of male coupling parts and female coupling parts, for coupling the panels to each other in the floor or wall covering; the male coupling part is provided at the male edge of the panels; the female coupling part is provided at the female edge of the panels; optionally the coupling parts are provided with integrated mechanical locking means which prevent the drifting apart of two coupled panels into the direction perpendicular to the surface of the floor or wall covering and/or into the direction perpendicular to the respective edges in the plane of the floor or wall covering; a recess is provided at the surface of the floor or wall covering between two panels mechanically coupled to each other by the male coupling part and the female coupling part, the recess optionally comprises a first recess cut out or otherwise provided at the female edge preferably through the top layer and preferably extending into the substrate; and optionally a second recess cut out or otherwise provided at the male edge preferably through the top layer and preferably extending into the substrate; the recess comprises a grouting material; wherein the panels comprise on their surface a groove, preferably wherein the groove is provided between and parallel with the two opposite sides comprising coupling parts, optionally the panels comprise on their surface a plurality of grooves provided between en parallel with the two opposite sides comprising coupling part; wherein the groove(s) comprises a grouting material.

160. A method for installing a floor or wall covering as in claim 143 comprising the steps of: providing floor or wall panels, for use in a floor or wall covering; installing the floor or wall panels by mechanically coupling the floor or wall panels by coupling the male coupling parts with the female coupling parts; applying grout into the recesses provided at the surface of the floor or wall covering between the floor or wall panels mechanically coupled to each other by the male coupling part and the female coupling part.

161. A floor covering, as in claim 143, wherein the floor covering comprises floor panels, an elastic strip and a flexible sealing agent, wherein the elastic strip is provided adjacent to—and preferably in contact with—an edge of the floor covering, wherein the flexible sealing agent is provided above—and preferably on top of—the elastic strip, wherein the flexible sealing agent is provided adjacent to and in contact with the edge of the floor covering.

162. The floor covering as in claim 161 wherein a skirting board is positioned onto the floor panels providing the edge of the floor covering, wherein the skirting board covers the elastic strip and the flexible sealing agent.

Description

[0177] Non-limiting preferred embodiments of the invention are shown in the drawings. The embodiments illustrated in the drawings show floor coverings and floor panels.

[0178] FIG. 1 shows the cross section of a first example of a floor panel that can be used in the invention.

[0179] FIG. 2 shows the cross section of a floor covering according to the invention comprising floor panels of FIG. 1.

[0180] FIG. 3 shows the cross section of an alternative floor covering according to the invention.

[0181] FIG. 4 shows the cross section of another example of a floor panel that can be used in the invention.

[0182] FIG. 5 shows the cross section of a floor covering according to the invention comprising floor panels of FIG. 4.

[0183] FIG. 6 shows the cross section of an alternative floor covering according to the invention.

[0184] FIG. 7 shows a cross section of another floor covering according to the invention.

[0185] FIG. 8 shows a cross section at a particular position of another floor covering according to the invention.

[0186] FIG. 9 shows the cross section of a floor covering according to the invention.

[0187] FIG. 10 shows the cross section of an alternative floor covering according to the invention.

[0188] FIGS. 11-18 show the cross section of other examples of floor coverings according to aspects of the invention.

[0189] FIG. 19 shows in a view perpendicular to the surface of the covering, a floor covering illustrating aspects of the invention.

[0190] FIGS. 20-26 show details of features that can be used in the invention.

[0191] FIG. 27 illustrates an embodiment of a floor covering according to the eighth aspect of the invention.

[0192] FIGS. 28, 29 and 30 show alternative embodiments of the invention, in cross sectional view similar to FIG. 5.

[0193] FIG. 31 shows an example of a panel comprising a groove provided between and parallel with the two opposite sides comprising coupling parts.

[0194] FIG. 32 shows in enlarged representation a detail of the cross section of the groove of FIG. 31.

[0195] FIGS. 33-41 show in a similar view as FIG. 32 alternative cross sections of grooves provided in panels between and parallel with opposite sides comprising coupling parts.

[0196] FIGS. 42 and 43 represent panels—viewed from above the panel—comprising grooves produced between and parallel with opposite sides comprising coupling parts.

[0197] FIG. 44 illustrates a floor covering comprising panels as shown in FIG. 42.

[0198] Reference numbers not defined in the description are defined in the claims.

[0199] FIG. 1 shows the cross section of a first example of an oblong floor panel that can be used in the invention. The floor covering of FIG. 2 comprises the floor panels (100) of FIG. 1. The floor panels comprise a substrate (104) and a top layer (102). The top layer comprises a decor layer and a wear layer. The decor upper surface is wear resistant and decorative. The substrate can comprise a plurality of layers.

[0200] The floor panels are provided at least at the edges (110, 120) of two opposite sides with coupling parts, cooperating which each other, substantially in the form of male coupling parts (112) and female coupling parts (114), for coupling the floor panels to each other in the floor covering. The male coupling parts and the female coupling parts are created out of material of the floor panel of the substrate.

[0201] The male coupling part is provided at the male edge (110) of the floor panels. The female coupling part is provided at the female edge (120) of the floor panels. The coupling parts are provided with integrated mechanical locking means which prevent the drifting apart of two coupled floor panels into the direction perpendicular to the surface of the floor covering and into the direction perpendicular to the respective edges in the plane of the floor covering.

[0202] The male coupling parts comprise a tongue (127) extending in horizontal direction. The female coupling parts comprise a groove (128) extending in horizontal direction. The largest thickness (D1) of the tongue is less than 70% of the largest opening (D2) of the groove. Such embodiments provide an easier coupling of the floor panels—requiring less efforts—while still good locking of the floor panels is achieved thanks to the use of the grout.

[0203] The groove (128) comprises a bottom lip (164) and an upper lip (165). The bottom lip extends over a longer distance from the edge of the floor panel than the upper lip. The contact between the coupled edges is only provided by the distal end of the bottom lip making contact with the edge of the other panel; and by the tongue making contact with the bottom surface of the upper lip (165) and with the upper surface of the bottom lip (164). In coupled condition of two panels, the bottom of the tongue makes contact with the upper surface of the bottom lip of the coupled panel at two different zones separated by a gap (161).

[0204] A symmetrical recess (130) is provided at the surface of the floor covering between two floor panels mechanically coupled to each other by the male coupling part and the female coupling part. The recess comprises a second recess (132) cut out at the male edge through the top layer. The recess can be established in alternative ways, e.g. by means of extrusion or compressive forces. The recess comprises a first recess (134) cut out at the female edge through the top layer. The recess can be established in alternative ways, e.g. by means of extrusion or compressive forces. The recess comprises an elastic grouting material (140).

[0205] The grouting material (140) is provided on a substantially horizontal surface (116) of the male coupling edge as well as on a substantially horizontal surface (118) of the female coupling edge. The substantially horizontal surfaces are provided at the bottom of the recess.

[0206] The recess has the shape of a trapezium, with the two parallel sides of the trapezium provided parallel with the floor panels; and with the longest side of the two parallel sides at the surface level of the floor. The two inclined sides of the trapezium intersect with the top surface of the floor panel. The trapezium arrangement of the recess results in it that an effective grout line can be created that effectively withstands thermal expansion and contraction of the tiles. Therefore, the grout lines are very durable.

[0207] In the example shown, the recess comprises surfaces (142) of the male edge and of the female edge having an included angle (a) with the top surface of the panel to which the edge belongs that is 80°. The surface of the male edge and of the surface of the female edge intersects with the top surface of the floor panel on which it is provided. These surfaces (142) having an included angle (a) with the top surface of the panel to which the edge belongs that is 80° create at the male edge and at the female edge an undercut having a triangular shape.

[0208] Below the recess a narrow gap (148) is provided in the substrate between the male edge and the female edge. When performing the grouting operation, grouting material flows into this narrow gap. The narrow gap is less than 0.5 mm wide; e.g. 0.3 mm. The grout that has flown into the gap creates an adhesive bond between the male edge and the female edge.

[0209] The male edge comprises a protrusion (160) directed substantially downwards. The protrusion is provided by removal of material at the bottom of the panel. However, the protrusion can be provided in different ways, e.g. via extrusion. The protrusion—which establishes the edge (174) of the panel—makes contact with the distal end (173) of the bottom lip (164) of the edge of the other panel thereby locking the panels horizontally in a flexible way. The protrusion is elastically bended. Preferably, the lower end (162) of the protrusion is provided at the same level as the bottom of the floor panels.

[0210] The bottom lip (164) comprises a first inwardly inclined contact surface (171). The bottom of the tongue comprises a second inwardly inclined contact surface (172). The first inwardly inclined contact surface (171) of the first panel contacts the second inwardly inclined contact surface (172) of the second panel coupled with the first panel, thereby establishing a locking of the first panel and the second panel in the plane of the floor covering. The contact of the first inwardly inclined contact surface (171) of the first panel with the second inwardly inclined contact surface (172) is provided by the elastic bending of the protrusion which establishes a pressure on the distal end of the distal end (173) of the bottom lip.

[0211] In horizontal direction a gap (175) is provided between the distal end of the tongue of the second panel and the proximal edge of the first panel.

[0212] FIG. 3 shows the cross section of an alternative floor covering according to the invention. The floor covering of FIG. 3 comprises oblong floor panels (200). The floor panels comprise a substrate (204) and a top layer (202). The top layer comprises a decor layer and a wear layer. The top layer is wear resistant and decorative, e.g. to imitate ceramic, stone, marble or other material. The decor upper surface is wear resistant and decorative. The substrate can comprise a plurality of layers.

[0213] The floor panels are provided at the edges (210, 220) of two opposite sides with coupling parts, cooperating which each other, substantially in the form of male coupling parts (212) and female coupling parts (214), for coupling floor panels to each other in the floor covering. The male coupling parts and the female coupling parts are created out of material of the substrate of the floor panel. The male coupling part is provided at the male edge (210) of the floor panels. The female coupling part is provided at the female edge (220) of the floor panels. The coupling parts are provided with integrated mechanical locking means which prevent the drifting apart of two coupled floor panels into the direction perpendicular to the surface of the floor covering and into the direction perpendicular to the respective edges in the plane of the floor covering.

[0214] The male coupling part (212) is provided by a downward-directed upper hook-shaped part (270). The downward-directed upper hook-shaped part (270) consists of a lip (271) with a downward-directed locking element (272) which forms a male part. The female coupling part (214) is provided by an upward-directed lower hook-shaped part (275). The upward-directed lower hook-shaped part consists of a lip (276) with an upward-directed locking element (277), which, proximally thereof, defines a female part in the form of a third recess (278). The male coupling part and the female coupling part are configured such that two of such floor panels can be coupled to each other at their respective edges by means of a downward movement (M) of the one floor panel in respect to the other, such that the panels are locked in the plane of the floor panels and/or perpendicular to the respective edges. The male coupling part and the female coupling part provide a vertically active locking system by means of vertically active locking parts (280, 281) of the male coupling part and of the female coupling part; this vertically active locking system creates a snap-together connection.

[0215] A symmetrical recess (230) is provided at the surface of the floor covering between two floor panels mechanically coupled to each other by the male coupling part and the female coupling part. The recess comprises a second recess (232) cut out or otherwise provided at the male edge through the top layer and extending into the substrate. The recess comprises a first recess (234) cut out at the female edge through the top layer and extending into the substrate. The recess comprises an elastic grouting material (240). The grouting material (240) is provided on a substantially horizontal surface (216) of the male coupling edge as well as on a substantially horizontal surface (218) of the female coupling edge. These substantially horizontal surfaces are provided at the bottom of the recess.

[0216] The recess (230) has the shape of a trapezium, with the two parallel sides of the trapezium provided parallel with the floor panels; and with the longest side of the two parallel sides at the surface level of the floor. This way, a very effective grout line can be created that effectively withstands thermal expansion and contraction of the tiles. Therefore, the grout line is very durable.

[0217] The recess (230) comprises surfaces (242) of the male edge and of the female edge having an included angle (a) with the top surface of the panel to which the edge belongs that is 80° The surface of the male edge and the surface of the female edge intersects with the top surface of the floor panel on which it is provided.

[0218] Below the recess a narrow gap (248) is provided in the substrate between the male edge and the female edge. When performing the grouting operation, grouting material penetrates into this gap, flowing downwards from the recess. The narrow gap is provided between vertical sections of the male edge and of the female edge; the narrow gap is e.g. 0.3 mm wide.

[0219] The male edge comprises a protrusion (260) directed substantially downwards. In the exemplary floor panels of FIG. 3, the protrusion directing substantially downwards is provided by removal of material at the bottom of the panel. However, the protrusion can be provided in other ways, e.g. by means of extrusion. The lower end (262) of the protrusion is provided at the same level as the bottom of the floor panels. The protrusion directed substantially downwards makes contact with the distal end of the other edge thereby locking the panels horizontally in a flexible way, wherein the protrusion is elastically bended; or can be elastically bended.

[0220] FIG. 4 shows the cross section of another example of an oblong floor panel that can be used in the invention. The floor covering of FIG. 5 comprises floor panels (300) of FIG. 4. The floor panels are to a large extent similar to the floor panels shown in FIG. 1. The floor panels comprise a substrate (304) and a top layer (302). The top layer comprises a decor layer and a wear layer. The decor upper surface is wear resistant and decorative. The substrate can comprise a plurality of layers.

[0221] The floor panels are provided at least at the edges (310, 220) of two opposite sides with coupling parts, cooperating which each other, substantially in the form of male coupling parts (312) and female coupling parts (314), for coupling the floor panels to each other in the floor covering. The male coupling parts and the female coupling parts are created out of material of the floor panel of the substrate.

[0222] The male coupling part is provided at the male edge (310) of the floor panels. The female coupling part is provided at the female edge (320) of the floor panels. The coupling parts are provided with integrated mechanical locking means which prevent the drifting apart of two coupled floor panels into the direction perpendicular to the surface of the floor covering and into the direction perpendicular to the respective edges in the plane of the floor covering.

[0223] The male coupling parts comprise a tongue (327) extending in horizontal direction. The female coupling parts comprise a groove (328) extending in horizontal direction. The largest thickness (D1) of the tongue is less than 70% of the largest opening (D2) of the groove. Such embodiments provide an easier coupling of the floor panels—requiring less efforts—while still good locking of the floor panels is achieved thanks to the use of the grout.

[0224] The groove (328) comprises a bottom lip (364) and an upper lip (365). The bottom lip extends over a longer distance from the edge of the floor panel than the upper lip. The contact between the coupled edges is only provided by the distal end of the bottom lip making contact with the edge of the other panel (more specifically with the protrusion 360); and by the tongue making contact with the bottom surface of the upper lip (365) and with the upper surface of the bottom lip (364). In coupled condition of two panels, the bottom of the tongue makes contact with the upper surface of the bottom lip of the coupled panel at two different zones separated by a gap (361).

[0225] A recess (330) is provided at the surface of the floor covering between two floor panels mechanically coupled to each other by the male coupling part and the female coupling part. The recess comprises a second recess (332) cut out at the male edge through the top layer. The recess can be established in alternative ways, e.g. by means of extrusion or compressive forces. The recess comprises a first recess (334) cut out at the female edge through the top layer. The recess can be established in alternative ways, e.g. by means of extrusion or compressive forces. The recess comprises an elastic grouting material (340).

[0226] In the example, the recess comprises surfaces (342) of the male edge and of the female edge having an included angle (α) with the top surface of the panel to which the edge belongs that is 80°. The surface of the male edge and of the surface of the female edge intersects with the top surface of the floor panel on which it is provided.

[0227] The surfaces (342) of the male edge and of the female edge that have an included angle (α) with the top surface of the panel to which the edge belongs that is 80°, provide an undercut in the male edge (named the first undercut) and an undercut in the female edge (called the second undercut). The first undercut as well as the second undercut have a triangular shape.

[0228] The second recess comprises a third undercut (392) in the male edge, the bottom section of the undercut is provided by the upper surface (329) of the tongue. The first recess comprises a fourth undercut (393). The third undercut and the fourth undercut have a curved shape. The fourth undercut (393) is provided above the groove (328) and is distanced from the groove (328) by a convex section (394) of the female edge (320).

[0229] The complete bottom of the recess (330) is provided in coupled condition by part of the upper surface (329) of the tongue. The grout (340) adheres to that part of the upper surface (329) of the tongue forming the bottom of the recess. The part of the upper surface of the tongue providing the bottom of the recess is provided as an inclined plane declining towards the distal end of the tongue.

[0230] In coupled condition of two floor panels an inclined section of the upper surface of the tongue (327) makes contact with an inclined section of the lower surface of the upper lip (365).

[0231] The male edge comprises a protrusion (360) directed substantially downwards. The protrusion directing substantially downwards is provided by removal of material at the bottom of the panel. However, the protrusion can be provided in different ways, e.g. via extrusion. The protrusion (360) directed substantially downwards makes contact with the distal edge of the bottom lip (364) of the other panel thereby locking the panels horizontally in a flexible way. In coupled condition, the protrusion (360) is elastically bended. Preferably, the lower end (362) of the protrusion is provided at the same level as the bottom of the floor panels.

[0232] FIG. 6 shows the cross section of an alternative floor covering according to the invention. The floor panels of FIG. 6 are to a large extent similar as the floor panels of FIGS. 4 and 5. Reference numerals in FIG. 6 have the same meaning as the same reference numerals in FIGS. 4 and 5. In the floor panels of the example of FIG. 6, the upper side edges of the recess are provided by surfaces of the male edge and of the female edge that have an included angle (δ) with the top surface of the panel that are substantially equal to 90°.

[0233] The second recess comprises a first undercut (492) in the male edge. The first recess comprises a second undercut (493) in the female edge. The first undercut (492) and the second undercut (493) have a curved edge. The bottom section of the first undercut is provided by the upper surface (329) of the tongue. The second undercut is provided above the groove (328). The second undercut (393) is distanced from the groove (328) by a convex section (394) of the female edge (320).

[0234] FIG. 7 shows a cross section of another floor covering according to the invention.

[0235] The floor panels used in the floor covering shown in FIG. 7 are to a large extent similar to the floor panels shown in FIG. 4. The floor panels (300) comprise a substrate (304) and a top layer (302). The top layer comprises a decor layer and a wear layer. The decor upper surface is wear resistant and decorative. The substrate can comprise a plurality of layers.

[0236] The floor panels are provided at least at the edges (310, 220) of two opposite sides with coupling parts, cooperating which each other, substantially in the form of male coupling parts and female coupling parts, for coupling the floor panels to each other in the floor covering. The male coupling parts and the female coupling parts are created out of material of the floor panel of the substrate.

[0237] The male coupling part is provided at the male edge (310) of the floor panels. The female coupling part is provided at the female edge (320) of the floor panels. The coupling parts are provided with integrated mechanical locking means which prevent the drifting apart of two coupled floor panels into the direction perpendicular to the surface of the floor covering and into the direction perpendicular to the respective edges in the plane of the floor covering.

[0238] The male coupling parts comprise a tongue (327) extending in horizontal direction. The female coupling parts comprise a groove (328) extending in horizontal direction. The largest thickness of the tongue is less than 70% of the largest opening of the groove. Such embodiments provide an easier coupling of the floor panels—requiring less efforts—while still good locking of the floor panels is achieved thanks to the use of the grout.

[0239] The groove (328) comprises a bottom lip (364) and an upper lip (365). The bottom lip extends over a longer distance from the edge of the floor panel than the upper lip. The bottom lip (364) comprises a first inwardly inclined contact surface (371). The bottom of the tongue comprises a second inwardly inclined contact surface (372). The first inwardly inclined contact surface (371) of the first panel contacts the second inwardly inclined contact surface (372) of the second panel coupled with the first panel, thereby establishing a locking of the first panel and the second panel in the plane of the floor covering.

[0240] The male edge comprises a protrusion (360) directed substantially downwards. The protrusion is provided by removal of material at the bottom of the panel. However, the protrusion can be provided in different ways, e.g. via extrusion. The protrusion—which establishes the edge (374) of the panel—makes contact with the distal end (373) of the bottom lip (364) of the edge of the other panel thereby locking the panels horizontally in a flexible way. The protrusion is elastically bended. Preferably, the lower end (362) of the protrusion is provided at the same level as the bottom of the floor panels.

[0241] The bottom lip (364) comprises a first inwardly inclined contact surface (371). The bottom of the tongue comprises a second inwardly inclined contact surface (372). The first inwardly inclined contact surface (371) of the first panel contacts the second inwardly inclined contact surface (372) of the second panel coupled with the first panel, thereby establishing a locking of the first panel and the second panel in the plane of the floor covering. The contact of the first inwardly inclined contact surface (371) of the first panel with the second inwardly inclined contact surface (372) is provided by the elastic bending of the protrusion which establishes a pressure on the distal end of the distal end (373) of the bottom lip.

[0242] In horizontal direction a gap (375) is provided between the distal end of the tongue (327) of the second panel and the proximal edge of the first panel.

[0243] The contact between the coupled edges is only provided by the distal end of the bottom lip making contact with the edge of the other panel (more specifically with the protrusion 360); and by the tongue making contact with the bottom surface of the upper lip (365) and with the upper surface of the bottom lip (364). The contact of the tongue making contact with the upper surface of the bottom lip (364) includes the contact between the first inwardly inclined contact surface (371) and the second inwardly inclined contact surface (372).

[0244] In coupled condition of two panels, the bottom of the tongue (327) makes contact with the upper surface of the bottom lip of the coupled panel at two different zones separated by a gap (361).

[0245] A recess (330) is provided at the surface of the floor covering between two floor panels mechanically coupled to each other by the male coupling part and the female coupling part. The recess comprises a second recess (332) cut out at the male edge through the top layer. The recess can be established in alternative ways, e.g. by means of extrusion or compressive forces. The recess comprises a first recess (334) cut out at the female edge through the top layer. The recess can be established in alternative ways, e.g. by means of extrusion or compressive forces. The recess comprises an elastic grouting material (340).

[0246] In the example, the recess comprises surfaces (342) of the male edge and of the female edge having an included angle (α) with the top surface of the panel to which the edge belongs that is 80°. The surface of the male edge and of the surface of the female edge intersects with the top surface of the floor panel on which it is provided.

[0247] The surfaces (342) of the male edge and of the female edge that have an included angle (α) with the top surface of the panel to which the edge belongs that is 80°, provide an undercut in the male edge (named the first undercut) and an undercut in the female edge (called the second undercut). The first undercut as well as the second undercut have a triangular shape.

[0248] The second recess comprises a third undercut (392) in the male edge, the bottom section of the undercut is provided by the upper surface (329) of the tongue. The first recess comprises a fourth undercut (393). The third undercut and the fourth undercut have a curved shape. The fourth undercut (393) is provided above the groove (328) and is distanced from the groove (328) by a convex section (394) of the female edge (320).

[0249] The complete bottom of the recess (330) is provided in coupled condition by part of the upper surface (329) of the tongue. The grout (340) adheres to that part of the upper surface (329) of the tongue forming the bottom of the recess. The part of the upper surface of the tongue providing the bottom of the recess is provided as an inclined plane declining towards the distal end of the tongue.

[0250] In coupled condition of two floor panels an inclined section of the upper surface of the tongue (327) makes contact with an inclined section of the lower surface of the upper lip (365).

[0251] The ratio of the horizontal distance D over which the tongue (327) extends in horizontal direction from the top surface of the panel edge on which the tongue is provided, over the thickness T of the floor panels is 0.58.

[0252] The panels used in the floor covering shown in FIG. 7 can have a constant cross section along their edges. However, the invention involves embodiments wherein in a first section along the edge comprising the male coupling parts, the tongue (327) is configured such that it contacts the bottom surface of the upper lip (365) of the coupled panel; and wherein in at least a second section along the edge comprising the male coupling parts, the tongue (327) is configured such that it does not contact the bottom surface of the upper lip (365) of the coupled panel. FIGS. 7 and 8 in combination illustrate such embodiment. FIG. 7 shows the cross section perpendicularly to the male edge at both end sections along the male edge, showing that the tongue (327) contacts the bottom surface of the upper lip (365). FIG. 8 shows the cross section perpendicularly to the male ends at other sections along the male edges; the tongue (327) in these sections does not contact the bottom surface of the upper lip (365). As there is no contact in these sections between the tongue and the bottom surface of the upper lip (365), grouting material (340) can flow in gaps provided at the distal end of the tongue and under the tongue, reinforcing the durability of the grouted floor covering. The difference between the cross sections of FIGS. 7 and 8 is provided by the configuration of the tongue, involving differences in the distance over which the tongue (327) extends from the panel edge.

[0253] FIG. 9 shows the cross section of a floor covering according to the invention. The floor covering of FIG. 9 comprises oblong floor panels (200). The floor panels comprise a substrate (204) and a top layer (202). The top layer comprises a decor layer and a wear layer. The top layer is wear resistant and decorative, e.g. to imitate ceramic, stone, marble or other material. The decor upper surface is wear resistant and decorative. The substrate can comprise a plurality of layers.

[0254] The floor panels are provided at the edges (210, 220) of two opposite sides with coupling parts, cooperating which each other, substantially in the form of male coupling parts (212) and female coupling parts (214), for coupling floor panels to each other in the floor covering. The male coupling parts and the female coupling parts are created out of material of the substrate of the floor panel. The male coupling part is provided at the male edge (210) of the floor panels. The female coupling part is provided at the female edge (220) of the floor panels. The coupling parts are provided with integrated mechanical locking means which prevent the drifting apart of two coupled floor panels into the direction perpendicular to the surface of the floor covering and into the direction perpendicular to the respective edges in the plane of the floor covering.

[0255] The male coupling part (212) is provided by a downward-directed upper hook-shaped part (270). The downward-directed upper hook-shaped part (270) consists of a lip (271) with a downward-directed locking element (272) which forms a male part. The female coupling part (214) is provided by an upward-directed lower hook-shaped part (275). The upward-directed lower hook-shaped part consists of a lip (276) with an upward-directed locking element (277), which, proximally thereof, defines a female part in the form of a third recess (278). The male coupling part and the female coupling part are configured such that two of such floor panels can be coupled to each other at their respective edges by means of a downward movement (M) of the one floor panel in respect to the other, such that the panels are locked in the plane of the floor panels and perpendicular to the respective edges.

[0256] The proximal end of the downward-directed locking element (272) comprises a first inclined contact surface (286). The proximal end of the upward-directed locking element (277) comprises a second inclined contact surface (287). In coupled condition of a first floor panel at the edge comprising the downward-directed locking element (272), its first inclined contact surface (286) contacts the second inclined contact surface (287) of the panel with which the first panel is coupled at the edge comprising the downward-directed locking element (272); thereby establishing a locking of the coupled panels in vertical direction.

[0257] The distal end of the upward-directed upper hook-shaped part (275) comprises a locking part (288), for cooperation with a locking part (289) at the proximal end of the downward-directed upper hook-shaped part (270) of a coupled panel, thereby establishing a locking of the coupled panels in vertical direction. In the example shown, this locking does not involve contact of the locking part (288) of the upward-directed upper hook-shaped part (275) with the locking part (289) at the proximal end of the downward-directed upper hook-shaped part (270) of the coupled panel.

[0258] In coupled condition of the downward-directed upper hook-shaped part (270) of a first panel with the upward-directed lower hook-shaped part (275) of a second panel, the bottom of the downward-directed locking element (272) of the first panel contacts the lip (276) of the upward-directed lower hook-shaped part (275) of the second panel.

[0259] In coupled condition of the downward-directed upper hook-shaped part (270) of a first panel with the upward-directed lower hook-shaped part (275) of a second panel, the lower surface of the lip (271) of the downward-directed upper hook-shaped part (270) of the first panel does not contact the upper surface of the upward-directed locking element (277) of the second panel.

[0260] A recess (230) is provided at the surface of the floor covering between two floor panels mechanically coupled to each other by the male coupling part and the female coupling part. The recess comprises an elastic grouting material (240). The floor panels are configured such that the recess extends to a part of the upper surface of the lip (276) of the upward-directed lower hook-shaped part (275). This way, grouting material (240) is provided on and adheres to part of the upper surface of the lip (276) of the upward-directed lower hook-shaped part (275). The width V of the recess at the upper surface of the lip (276) of the upward-directed lower hook-shaped part (275) is e.g. 2 mm.

[0261] The arrangement of the male and female edges shown in FIGS. 1 and 2 or shown in FIGS. 4 and 5 or 6 or 7 or 8, can be provided at first opposed edges of rectangular, square or oblong, floor panels. The arrangement of the male and female edges shown in FIG. 3 or 9 can be provided at the second opposed edges of these square or oblong floor panels. Floor coverings made with such floor panels can be mechanically coupled at all four sides using the relevant male and female coupling parts. These floor coverings show recesses around all four sides of the floor panels of the floor covering, filled with grouting material.

[0262] The arrangement of the male and female edges shown in FIGS. 1 and 2 or shown in FIGS. 4 and 5; or 6 or 7 or 8, can be provided at first opposed edges of rectangular, square or oblong, floor panels, as well as at second opposed edges of rectangular, square or oblong, floor panels. Floor coverings made with such floor panels can be mechanically coupled at all four sides using the relevant male and female coupling parts. These floor coverings show recesses around all four sides of the floor panels of the floor covering, filled with grouting material.

[0263] The arrangement of the male and female edges according to “double hook” embodiments, e.g. as shown in FIGS. 3 and 9 can be provided at first opposed edges of rectangular, square or oblong, floor panels, as well as at second opposed edges of rectangular, square or oblong, floor panels. Floor coverings made with such floor panels can be mechanically coupled at all four sides using the relevant male and female coupling parts. These floor coverings show recesses around all four sides of the floor panels of the floor covering, filled with grouting material.

[0264] FIG. 10 shows the cross section of an alternative floor covering according to the invention. The floor covering is to a large extent similar to the floor covering shown in FIG. 6. The reference numerals in FIG. 10 have the same meaning as the reference numerals in FIGS. 4, 5 and 6. The coupling parts of the panels of the floor covering of FIG. 10 are configured such that when installing the covering, a panel can be coupled via a turning movement of the panel relative to an already installed panel, wherein the male coupling part of the male edge of the panel is inserted into the female coupling part of the female edge of the already installed panel. Furthermore, the coupling parts of the panels of the floor covering of FIG. 10 are configured such that when installing the covering, a panel can be coupled via a substantially horizontal sliding movement with snap effect of the panel relative to an already installed panel, wherein the male coupling part of the male edge of the panel is inserted into the female coupling part of the female edge of the already installed panel with a snap effect.

[0265] The female edge of the panels of the embodiment shown in FIG. 10 comprises a rounded nose (1001) above the groove (328). Especially the rounding at the bottom of the nose assists the installation and coupling of the panels via a substantially horizontal sliding movement with snap effect. Grouting material (340) contacts and adheres to the upper section of the nose (1001), as well as to the bottom section of the nose (1001). the rounding at the bottom of the nose (1001) guides the tongue (327) of the panel to be installed correctly into the groove (328) during the substantially horizontal sliding movement with snap effect.

[0266] A detail (500) of the floor covering shown in FIG. 10 is shown enlarged in FIG. 20.

[0267] FIG. 11 shows the cross section of yet another example of floor covering according to aspects of the invention. FIG. 11 shows a floor covering comprising floor or wall panels (200). The panels comprise a substrate (204) and a top layer (202). The top layer comprises a decor layer; and optionally a wear layer. The panels are provided at least at the edges (210, 220) of two opposite sides with coupling parts, cooperating which each other, substantially in the form of male coupling parts (212) and female coupling parts (214), for coupling the panels to each other in the floor or wall covering. The male coupling part (212) is provided at the male edge (210) of the panels. The female coupling part (214) is provided at the female edge (220) of the panels. The coupling parts are provided with integrated mechanical locking means which prevent the drifting apart of two coupled panels into the direction perpendicular to the surface of the floor or wall covering and/or into the direction perpendicular to the respective edges in the plane of the floor or wall covering.

[0268] A recess (230) is provided at the surface of the floor or wall covering between two panels mechanically coupled to each other by the male coupling part and the female coupling part. The recess (230) comprises a first recess (234) cut out or otherwise provided at the female edge, through the top layer and extending into the substrate; and a second recess (232) cut out or otherwise provided at the male edge through the top layer and extending into the substrate.

[0269] The male coupling part is provided by a downward-directed upper hook-shaped part (270). The downward-directed upper hook-shaped part (270) comprises a lip (271) with a downward-directed locking element (272) which forms a male part.

[0270] The female coupling part is provided by an upward-directed lower hook-shaped part (275). The upward-directed lower hook-shaped part (275) comprises a lip (276) with an upward-directed locking element (277), which, proximally thereof, defines a female part in the form of a third recess (278).

[0271] The male coupling part and the female coupling part are configured such that two of such panels can be coupled to each other at their respective edges by means of a movement (M) perpendicular to the surface of the panels of the one panel in respect to the other, such that the panels are locked in the plane of the panels and perpendicular to the respective edges. The recess (230) comprises a grouting material (240).

[0272] In coupled condition of the male coupling part (212) of a panel with the female coupling part (214) of another panel, a locking in vertical direction is provided at the distal end of the downward-directed locking element (272) of the panel. A nose (401) extends from the proximal end of the edge comprising the female coupling part. The nose interacts with the downward-direct locking element (272) of the coupled panel, thereby providing a locking in vertical direction at the distal end of the downward-directed locking element (272). The vertical locking at the distal end of the downward directed locking element (272) is established at inclined surfaces (402, 403) of the nose (401) and of the downward-directed locking element (272). In the example shown, in coupled condition the inclined surfaces (402, 403) are in contact with pretension.

[0273] The grouting material (240) contacts the upper part of the nose (401). The grouting material (240) contacts part of the upper surface of the downward-directed locking element (272). The male edge and the female edge each comprise an undercut (392, 393), wherein each of these undercuts comprise grouting material.

[0274] No vertical locking is provided between coupled panels at the proximal end of the upward-directed locking element (277) nor at the proximal end of the downward-directed locking element (272). However, the proximal end of the upward-directed locking element (277) contacts the proximal end of the downward-directed locking element (272) with pretension at their contact surfaces (586, 587).

[0275] In coupled condition of the male edge of a panel with the female edge of another panel, a locking in vertical direction is provided at the distal end of the upward-directed locking element (277). The distal end of the upward-directed locking element (277) comprises an undercut (412). The panels comprise at the proximal edge of their male edge a corresponding hook (413). The corresponding hook (413) is provided for interacting with the upward-directed locking element (277) of a coupled panel for establishing a locking in vertical direction.

[0276] The bottom surface of the undercut is provided for establishing a locking in vertical direction. In the example shown in FIG. 11, the upward-directed locking element (277) contacts the proximal edge of the panel with which it is coupled at the distal end of the upward-directed locking element (277). The distal end of the upward-directed locking element (277) comprises an undercut (412) and the upward-directed locking element (277) contacts the proximal edge of the panel with which it is coupled at the undercut of the upward-directed locking element (277).

[0277] This also results in a locking in horizontal direction (440) between neighboring panels provided by contact between coupled panels at the distal end of the downward-directed locking element (277).

[0278] The panels of the embodiment shown in FIG. 11 can be installed at their first set of opposite edges via a vertical push or drop movement (M), but also via a turning movement of a panel relative to an already installed panel, wherein the male coupling part of the male edge is inserted into the female coupling part of the female edge of the already installed panel; and also via a substantially horizontal sliding movement with snap effect of a panel relative to an already installed panel, wherein the male coupling part of the male edge is inserted into the female coupling part of the female edge of the already installed panel with a snap effect.

[0279] The panels of the embodiment shown in FIG. 11 are configured such that at least before applying the grouting material to the covering, a panel can be removed from the covering via a turning movement of one panel with respect of another panel, wherein the male coupling part of the male edge is removed out of the female coupling part of the female edge of the another panel.

[0280] The upper surface of the downward-directed locking element (272) comprises a step (415). The grouting material contacts the step (415).

[0281] A cut (417) is provided in the panels extending from the bottom of the panel. The cut (417) is provided proximal to the male edge of the panel; the cut (417) extends from the bottom of the panel into the panel for more than 30% of the thickness of the panel. In the example of FIG. 11 the cut (417) extends perpendicularly to the bottom of the panel.

[0282] The panels shown in the embodiment of FIG. 11 can be rectangular, square or oblong. They can be provided at the second set of opposite edges with coupling parts as in any embodiment of any aspect of the invention.

[0283] FIG. 12 shows the cross section of yet another example of floor covering according to aspects of the invention. FIG. 12 shows a floor covering comprising floor or wall panels (200). The panels comprise a substrate (204) and a top layer (202). The top layer comprises a decor layer; and optionally a wear layer. The panels are provided at least at the edges (210, 220) of two opposite sides with coupling parts, cooperating which each other, substantially in the form of male coupling parts (212) and female coupling parts (214), for coupling the panels to each other in the floor or wall covering. The male coupling part (212) is provided at the male edge (210) of the panels. The female coupling part (214) is provided at the female edge (220) of the panels. The coupling parts are provided with integrated mechanical locking means which prevent the drifting apart of two coupled panels into the direction perpendicular to the surface of the floor or wall covering and into the direction perpendicular to the respective edges in the plane of the floor or wall covering.

[0284] A recess (230) is provided at the surface of the floor or wall covering between two panels mechanically coupled to each other by the male coupling part and the female coupling part. The recess (230) comprises a first recess (234) cut out or otherwise provided at the female edge, through the top layer and extending into the substrate; and a second recess (232) cut out or otherwise provided at the male edge through the top layer and extending into the substrate.

[0285] The male coupling part is provided by a downward-directed upper hook-shaped part (270). The downward-directed upper hook-shaped part (270) comprises a lip (271) with a downward-directed locking element (272) which forms a male part.

[0286] The female coupling part is provided by an upward-directed lower hook-shaped part (275). The upward-directed lower hook-shaped part (275) comprises a lip (276) with an upward-directed locking element (277), which, proximally thereof, defines a female part in the form of a third recess (278).

[0287] The male coupling part and the female coupling part are configured such that two of such panels can be coupled to each other at their respective edges by means of a movement (M) perpendicular to the surface of the panels of the one panel in respect to the other, such that the panels are locked in the plane of the panels and perpendicular to the respective edges.

[0288] The recess (230) comprises a grouting material (240).

[0289] In coupled condition of the male coupling part (212) of a panel with the female coupling part (214) of another panel, a locking in vertical direction is provided at the distal end of the downward-directed locking element (272) of the panel. A nose (401) extends from the proximal end of the edge comprising the female coupling part. The nose interacts with the downward-direct locking element (272) of the coupled panel, thereby providing a locking in vertical direction at the distal end of the downward-directed locking element (272). The vertical locking at the distal end of the downward directed locking element (272) is established at inclined surfaces (402, 403) of the nose (401) and of the downward-directed locking element (272); preferably wherein in coupled condition the inclined surfaces are in contact with pretension.

[0290] The grouting material (240) contacts the upper part of the nose (401). The grouting material (240) contacts part of the upper surface of the downward-directed locking element (272). The male edge and the female edge each comprise an undercut (392, 393), wherein each of these undercuts comprise grouting material. The upper surface of the downward-directed locking element (272) comprises a step (415). The grouting material contacts the step (415).

[0291] No vertical locking is provided between coupled panels at the proximal end of the upward-directed locking element (277) nor at the proximal end of the downward-directed locking element (272). However, the proximal end of the upward-directed locking element (277) contacts the proximal end of the downward-directed locking element (272) with pretension at their contact surfaces (586, 587).

[0292] In coupled condition of the male edge of a panel with the female edge of another panel, a locking in vertical direction is provided at the distal end of the upward-directed locking element (277) without contact. The distal end of the upward-directed locking element (277) comprises an undercut (412). The panels comprise at the proximal edge of their male edge a corresponding hook (413). The corresponding hook (413) is provided for interacting with the upward-directed locking element (277) of a coupled panel for establishing a locking in vertical direction. This locking in FIG. 12 is provided without contact between the distal end of the upward-directed locking element (277) and the corresponding hook (413).

[0293] The panels of the embodiment shown in FIG. 12 can be installed at their first set of opposite edges via a vertical drop or push movement (M), but also via a turning movement of a panel relative to an already installed panel, wherein the male coupling part of the male edge is inserted into the female coupling part of the female edge of the already installed panel; and also via a substantially horizontal sliding movement with snap effect of a panel relative to an already installed panel, wherein the male coupling part of the male edge is inserted into the female coupling part of the female edge of the already installed panel with a snap effect.

[0294] The panels of the embodiment shown in FIG. 112 are configured such that at least before applying the grouting material to the covering, a panel can be removed from the covering via a turning movement of one panel with respect of another panel, wherein the male coupling part of the male edge is removed out of the female coupling part of the female edge of the another panel.

[0295] The panels shown in the embodiment of FIG. 12 can be rectangular, square or oblong. They can be provided at the second set of opposite edges with coupling parts as in any embodiment of any aspect of the invention.

[0296] FIG. 13 shows the cross section of yet another example of floor covering according to aspects of the invention. The embodiment shown in FIG. 13 is to a very large extent similar to the embodiment shown in FIG. 11. Reference numbers in FIG. 13 have the same meaning as in FIG. 11. The embodiment in FIG. 13 differs from the embodiment of FIG. 11 in that the cut (417) makes an angle 85° with the bottom of the panels. The cut (417) extends towards the distal end comprising the male edge when observed from the inside of the panel towards the bottom of the panel. This way, milling of the coupling parts is facilitated, as the milling tools can be positioned closer to the chains of the continuous milling machine which is used. Closer positioning of the milling tools to the chains of the continuous milling machines enables to achieve narrower milling tolerances.

[0297] FIG. 14 shows the cross section of yet another example of floor covering according to aspects of the invention. The embodiment shown in FIG. 14 is to a very large extent similar to the embodiment shown in FIG. 12. Reference numbers in FIG. 14 have the same meaning as in FIG. 12. As in FIG. 12, a cut (417) is provided in the panels extending from the bottom of the panel. The cut (417) is provided proximal to the male edge of the panel and extends from the bottom of the panel into the panel for more than 30% of the thickness of the panel. In the example of FIG. 14 the cut (417) makes an angle 85° with the bottom of the panels. The cut (417) extends towards the distal end comprising the male edge when observed from the inside of the panel towards the bottom of the panel. This way, milling of the coupling parts is facilitated, as the milling tools can be positioned closer to the chains of the continuous milling machine which is used. Closer positioning of the milling tools to the chains of the continuous milling machines enables to achieve narrower milling tolerances.

[0298] FIG. 15 shows the cross section of yet another example of floor covering according to aspects of the invention. FIG. 15 shows a floor covering comprising floor or wall panels (200). The panels comprise a substrate (204) and a top layer (202). The top layer comprises a decor layer, and optionally a wear layer. The panels are provided at least at the edges (210, 220) of two opposite sides with coupling parts, cooperating which each other, substantially in the form of male coupling parts (212) and female coupling parts (214), for coupling the panels to each other in the floor or wall covering. The male coupling part (212) is provided at the male edge (210) of the panels. The female coupling part (214) is provided at the female edge (220) of the panels. The coupling parts are provided with integrated mechanical locking means which prevent the drifting apart of two coupled panels into the direction perpendicular to the surface of the floor or wall covering and into the direction perpendicular to the respective edges in the plane of the floor or wall covering.

[0299] A recess (230) is provided at the surface of the floor or wall covering between two panels mechanically coupled to each other by the male coupling part and the female coupling part. The recess (230) comprises a first recess (234) cut out or otherwise provided at the female edge, through the top layer and extending into the substrate; and a second recess (232) cut out or otherwise provided at the male edge through the top layer and extending into the substrate.

[0300] The male coupling part is provided by a downward-directed upper hook-shaped part (270). The downward-directed upper hook-shaped part (270) comprises a lip (271) with a downward-directed locking element (272) which forms a male part.

[0301] The female coupling part is provided by an upward-directed lower hook-shaped part (275). The upward-directed lower hook-shaped part (275) comprises a lip (276) with an upward-directed locking element (277), which, proximally thereof, defines a female part in the form of a third recess (278).

[0302] The male coupling part and the female coupling part are configured such that two of such panels can be coupled to each other at their respective edges by means of a movement (M) perpendicular to the surface of the panels of the one panel in respect to the other, such that the panels are locked in the plane of the panels and perpendicular to the respective edges.

[0303] The recess (230) comprises a grouting material (240). The upper surface of the downward-directed locking element (272) comprises a step (415). The grouting material contacts the step (415).

[0304] In coupled condition of the male coupling part (212) of a panel with the female coupling part (214) of another panel, a locking in vertical direction is provided at the distal end of the downward-directed locking element (272) of the panel. A nose (401) extends from the proximal end of the edge comprising the female coupling part. The nose interacts with the downward-direct locking element (272) of the coupled panel, thereby providing a locking in vertical direction at the distal end of the downward-directed locking element (272). The vertical locking at the distal end of the downward directed locking element (272) is established at inclined surfaces (402, 403) of the nose (401) and of the downward-directed locking element (272); preferably wherein in coupled condition the inclined surfaces are in contact with pretension.

[0305] The grouting material (240) contacts the upper part of the nose (401). The grouting material (240) contacts part of the upper surface of the downward-directed locking element (272). The male edge and the female edge each comprise an undercut (392, 393), wherein each of these undercuts comprise grouting material.

[0306] No vertical locking is provided between coupled panels at the proximal end of the upward-directed locking element (277) nor at the proximal end of the downward-directed locking element (272). However, the proximal end of the upward-directed locking element (277) contacts the proximal end of the downward-directed locking element (272) with pretension at their contact surfaces (586, 587).

[0307] In coupled condition of the male edge of a panel with the female edge of another panel, a locking in vertical direction is provided at the distal end of the upward-directed locking element (277). The distal end of the upward-directed locking element (277) comprises an undercut (412). The panels comprise at the proximal edge of their male edge a corresponding hook (413). The bottom surface of the undercut (412) contacts the corresponding hook (413), thereby establishing a locking in vertical direction.

[0308] The panels of the embodiment shown in FIG. 15 can be installed at their first set of opposite edges via a vertical drop or push movement (M), but also via a turning movement of a panel relative to an already installed panel, wherein the male coupling part of the male edge is inserted into the female coupling part of the female edge of the already installed panel; and also via a substantially horizontal sliding movement with snap effect of a panel relative to an already installed panel, wherein the male coupling part of the male edge is inserted into the female coupling part of the female edge of the already installed panel with a snap effect.

[0309] The panels of the embodiment shown in FIG. 15 are configured such that at least before applying the grouting material to the covering, a panel can be removed from the covering via a turning movement of one panel with respect of another panel, wherein the male coupling part of the male edge is removed out of the female coupling part of the female edge of the another panel.

[0310] A cut (417) is provided in the panels extending from the bottom of the panel. The cut (417) is provided proximal to the male edge of the panel; the cut (417) extends from the bottom of the panel into the panel for more than 30% of the thickness of the panel. In the example of FIG. 15 the cut (417) makes an angle 85° with the bottom of the panels. The cut (417) extends towards the distal end comprising the male edge when observed from the inside of the panel towards the bottom of the panel.

[0311] The panels shown in the embodiment of FIG. 15 can be rectangular, square or oblong. They can be provided at the second set of opposite edges with coupling parts as in any embodiment of any aspect of the invention.

[0312] FIG. 16 shows the cross section of yet another example of floor covering according to aspects of the invention. FIG. 16 shows a floor covering comprising floor or wall panels (200). The panels comprise a substrate (204) and a top layer (202). The top layer comprises a decor layer, and optionally a wear layer. The panels are provided at least at the edges (210, 220) of two opposite sides with coupling parts, cooperating which each other, substantially in the form of male coupling parts (212) and female coupling parts (214), for coupling the panels to each other in the floor or wall covering. The male coupling part (212) is provided at the male edge (210) of the panels. The female coupling part (214) is provided at the female edge (220) of the panels. The coupling parts are provided with integrated mechanical locking means which prevent the drifting apart of two coupled panels into the direction perpendicular to the surface of the floor or wall covering and/or into the direction perpendicular to the respective edges in the plane of the floor or wall covering.

[0313] A recess (230) is provided at the surface of the floor or wall covering between two panels mechanically coupled to each other by the male coupling part and the female coupling part. The recess (230) comprises a first recess (234) cut out or otherwise provided at the female edge, through the top layer and extending into the substrate; and a second recess (232) cut out or otherwise provided at the male edge through the top layer and extending into the substrate. The recess (230) comprises a grouting material (240).

[0314] The male coupling part is provided by a downward-directed upper hook-shaped part (270). The downward-directed upper hook-shaped part (270) comprises a lip (271) with a downward-directed locking element (272) which forms a male part.

[0315] The female coupling part is provided by an upward-directed lower hook-shaped part (275). The upward-directed lower hook-shaped part (275) comprises a lip (276) with an upward-directed locking element (277), which, proximally thereof, defines a female part in the form of a third recess (278).

[0316] The male coupling part and the female coupling part are configured such that two of such panels can be coupled to each other at their respective edges by means of a movement (M) perpendicular to the surface of the panels of the one panel in respect to the other, such that the panels are locked in the plane of the panels and perpendicular to the respective edges.

[0317] In coupled condition of the male coupling part (212) of a panel with the female coupling part (214) of another panel, a locking in vertical direction is provided at the distal end of the downward-directed locking element (272) of the panel.

[0318] A nose (401) extends from the proximal end of the edge comprising the female coupling part. The nose (401) interacts with the downward-direct locking element (272) of the coupled panel, thereby providing a locking in vertical direction at the distal end of the downward-directed locking element (272).

[0319] The nose (401) of the first of the coupled panels establishes a first contact surface (405) with the female edge of the second of the coupled panels and a second contact surface (406) with the female edge of the second of the coupled panels. The first contact surface (405) is perpendicular to the surface of the coupled panels, thereby establishing a locking in horizontal direction of the coupled panels and properly defining the width of the recess (230) in which grout is provided.

[0320] The second contact surface (406) makes—in the example of FIG. 16—an angle −25° with the surface of the coupled panels, thereby establishing a locking in the direction perpendicular to the surface of the coupled panels.

[0321] The grouting material (240) contacts the upper part of the nose (401). The grouting material (240) contacts part of the upper surface of the downward-directed locking element (272). The male edge and the female edge each comprise an undercut (392, 393), wherein each of these undercuts comprise grouting material (240).

[0322] No vertical locking is provided between coupled panels at the proximal end of the upward-directed locking element (277) nor at the proximal end of the downward-directed locking element (272). However, the proximal end of the upward-directed locking element (277) contacts the proximal end of the downward-directed locking element (272) with pretension at their contact surfaces (586, 587).

[0323] In coupled condition of the male edge of a panel with the female edge of another panel, a locking in vertical direction is provided at the distal end of the upward-directed locking element (277). The distal end of the upward-directed locking element (277) comprises an undercut (412). The panels comprise at the proximal edge of their male edge a corresponding hook (413). The corresponding hook (413) is provided for interacting with the upward-directed locking element (277) of a coupled panel for establishing a locking in vertical direction.

[0324] The bottom surface of the undercut is provided for establishing a locking in vertical direction. In the example shown in FIG. 16, the upward-directed locking element (277) contacts the proximal edge of the panel with which it is coupled at the distal end of the upward-directed locking element (277) and wherein the distal end of the upward-directed locking element (277) comprises an undercut (412) and the upward-directed locking element (277) contacts the proximal edge of the panel with which it is coupled at the undercut of the upward-directed locking element (277).

[0325] This also results in a locking in horizontal direction (440) between neighboring panels provided by contact between coupled panels at the distal end of the downward-directed locking element (277).

[0326] The panels of the embodiment shown in FIG. 16 can be installed at their first set of opposite edges via a vertical drop or push movement (M), but also via a turning movement of a panel relative to an already installed panel, wherein the male coupling part of the male edge is inserted into the female coupling part of the female edge of the already installed panel; and also via a substantially horizontal sliding movement with snap effect of a panel relative to an already installed panel, wherein the male coupling part of the male edge is inserted into the female coupling part of the female edge of the already installed panel with a snap effect.

[0327] The panels of the embodiment shown in FIG. 16 are configured such that at least before applying the grouting material to the covering, a panel can be removed from the covering via a turning movement of one panel with respect of another panel, wherein the male coupling part of the male edge is removed out of the female coupling part of the female edge of the another panel.

[0328] A cut (417) is provided in the panels extending from the bottom of the panel. The cut (417) is provided proximal to the male edge of the panel; the cut (417) extends from the bottom of the panel into the panel for more than 30% of the thickness of the panel. In the example of FIG. 16 the cut (417) extends perpendicularly to the bottom of the panel.

[0329] The panels shown in the embodiment of FIG. 16 can be rectangular, square or oblong. They can be provided at the second set of opposite edges with coupling parts as in any embodiment of any aspect of the invention.

[0330] FIG. 17 shows the cross section of yet another example of floor covering according to aspects of the invention. The embodiment shown in FIG. 17 is to a large extent similar to the embodiment shown in FIG. 16, however, no cut (417 in FIG. 16) is provided proximal to the male edge of the panels and extending from the bottom of the panels. The reference numbers in FIG. 17 have the same meaning as the reference numerals in FIG. 16.

[0331] FIG. 18 shows the cross section of yet another example of floor covering according to aspects of the invention. FIG. 18 shows a floor covering comprising floor or wall panels (200). The panels comprise a substrate (204) and a top layer (202). The top layer comprises a decor layer, and optionally a wear layer. The panels are provided at least at the edges (210, 220) of two opposite sides with coupling parts, cooperating which each other, substantially in the form of male coupling parts (212) and female coupling parts (214), for coupling the panels to each other in the floor or wall covering. The male coupling part (212) is provided at the male edge (210) of the panels. The female coupling part (214) is provided at the female edge (220) of the panels. The coupling parts are provided with integrated mechanical locking means which prevent the drifting apart of two coupled panels into the direction perpendicular to the surface of the floor or wall covering and into the direction perpendicular to the respective edges in the plane of the floor or wall covering.

[0332] A recess (230) is provided at the surface of the floor or wall covering between two panels mechanically coupled to each other by the male coupling part and the female coupling part. The recess (230) comprises a first recess (234) cut out or otherwise provided at the female edge, through the top layer and extending into the substrate; and a second recess (232) cut out or otherwise provided at the male edge through the top layer and extending into the substrate. The recess (230) comprises a grouting material (240).

[0333] The male coupling part is provided by a downward-directed upper hook-shaped part (270). The downward-directed upper hook-shaped part (270) comprises a lip (271) with a downward-directed locking element (272) which forms a male part.

[0334] The female coupling part is provided by an upward-directed lower hook-shaped part (275). The upward-directed lower hook-shaped part (275) comprises a lip (276) with an upward-directed locking element (277), which, proximally thereof, defines a female part in the form of a third recess (278).

[0335] The male coupling part and the female coupling part are configured such that two of such panels can be coupled to each other at their respective edges by means of a movement (M) perpendicular to the surface of the panels of the one panel in respect to the other, such that the panels are locked in the plane of the panels and perpendicular to the respective edges.

[0336] In coupled condition of the male coupling part (212) of a panel with the female coupling part (214) of another panel, a locking in vertical direction is provided at the distal end of the downward-directed locking element (272) of the panel.

[0337] A nose (401) extends from the proximal end of the edge comprising the female coupling part. The nose (401) interacts with the downward-direct locking element (272) of the coupled panel, thereby providing a locking in vertical direction at the distal end of the downward-directed locking element (272).

[0338] The nose (401) of the first of the coupled panels establishes a first contact surface (405) with the female edge of the second of the coupled panels and a second contact surface (406) with the female edge of the second of the coupled panels. The first contact surface (405) is perpendicular with the surface of the coupled panels, thereby establishing a locking in horizontal direction of the coupled panels.

[0339] The second contact surface (406) makes—in the example of FIG. 18—an angle −25° with the surface of the coupled panels.

[0340] The grouting material (240) contacts the upper part of the nose (401). Furthermore, the grouting material (240) contacts at least part of the upper surface of the downward-directed locking element (272). The male edge and the female edge comprise each an undercut (392, 393), wherein each of these undercuts comprise grouting material. All these features provide an excellent anchoring of the grouting material in the coupled panels, increasing the strength of the coupling, and the durability of the grout itself in the floor covering.

[0341] In the example of FIG. 18, the proximal end of the downward-directed locking element (272) comprises a first inclined contact surface (286). The proximal end of the upward-directed locking element (277) comprises a second inclined contact surface (287). In coupled condition of a first panel at the edge comprising the downward-directed locking element (272), its first inclined contact surface (286) contacts the second inclined contact surface (287) of the panel with which the first panel is coupled at the edge comprising the downward-directed locking element (272); thereby establishing a locking of the coupled panels in vertical direction. The vertical locking is established with pretension. In the example shown in FIG. 17, the contact surface established by the first inclined contact surface (286) and the second inclined contact surface (287) has an angle 5° with the direction perpendicular to the surface of the panels.

[0342] In the example of FIG. 18, in coupled condition of the male coupling part (212) of a panel with the female coupling part (214) of another panel, no locking in vertical direction is provided at the distal end of the upward-directed locking element (277).

[0343] The configuration shown in FIG. 18 can e.g. be combined with at the other set of opposing edges of the panels a configuration as shown in any of the FIG. 2, 5, 6, 7, 8 or 10. This way, the panels can be coupled by means of the fold-down technique during installation, followed by the application of the grouting material.

[0344] FIG. 19 shows in a view perpendicular to the surface of the floor covering, a floor covering illustrating aspects of the invention. The floor covering comprises floor panels (100). The panels are square; and their sides are larger than 250 millimeter, preferably larger than 300 millimeter, more preferably larger than 600 millimeter. However, the panels do not need to be square.

[0345] The panels comprise a substrate and a top layer. The top layer comprises a decor layer (102), and optionally a wear layer. The panels are provided at the edges of the first set of opposite sides with coupling parts, cooperating which each other, substantially in the form of male coupling parts and female coupling parts, for coupling the panels to each other in the floor or wall covering. The male coupling part is provided at the male edge of the panels. The female coupling part is provided at the female edge of the panels. The coupling parts are provided with integrated mechanical locking means which prevent the drifting apart of two coupled panels into the direction perpendicular to the surface of the floor or wall covering and into the direction perpendicular to the respective edges in the plane of the floor or wall covering.

[0346] The edges of the second set of opposite sides are provided with coupling parts, cooperating which each other, substantially in the form of male coupling parts and female coupling parts, for coupling the panels to each other in the floor or wall covering. The male coupling part of the second set of opposite sides is provided at the male edge of the panels. The female coupling part of the second set of opposite sides is provided at the female edge of the panels. The coupling parts at the second set of opposite sides are provided with integrated mechanical locking means which prevent the drifting apart of two coupled panels into the direction perpendicular to the surface of the floor or wall covering and into the direction perpendicular to the respective edges in the plane of the floor or wall covering.

[0347] At one or at both edges of the first set of opposite sides as well as of the second set of opposite sides, a recess is provided at the surface of the floor or wall covering between two panels mechanically coupled to each other by the male coupling part and the female coupling part. These recesses comprise grouting material (140). Grouting material (140) is provided around the full circumference of the decor layer of the panels.

[0348] The decor layer (102) ends at the edges of the two opposite provided with coupling parts in the view perpendicular to the surface of the panel along non-linear lines (420, 421). The non-linear lines (420, 421) in the example of FIG. 19 are irregularly undulated lines. However, the use of other types of non-linear lines is possible, e.g. crenated lines; and/or lines comprising notches.

[0349] The floor covering shown in FIG. 19 can be a floor covering according to any appropriate embodiment of the first, second, third, fourth or sixth aspect of the invention.

[0350] FIGS. 20-26 show details of features that can be used in aspects of the invention. FIG. 20 shows a detail (500) of the floor covering of FIG. 10: the upper side edges of the recess (330)— which comprises grouting material (340)—are provided by surfaces of the male edge and of the female edge that have an included angle (δ) with the top surface of the panel that are substantially equal to 90°.

[0351] FIG. 21 shows an alternative for the detail (500) that can be used in the invention. the upper side edges of the recess (330)— which comprises grouting material (340)—are provided by surfaces of the male edge and of the female edge that comprise inclined bevels (430).

[0352] FIG. 22 shows yet another alternative for the detail (500) that can be used in the invention. The upper side edges of the recess (330)— which comprises grouting material (340)—are provided by surfaces of the male edge and of the female edge that comprise curved bevels (431).

[0353] FIG. 23 shows yet another alternative for the detail (500) that can be used in the invention. The upper side edges of the recess (330)— which comprises grouting material (340)—are provided by surfaces of the male edge and of the female edge that comprise curved bevels (431). The side edges of the recess (330) are continuously curved, such that they have no sharp edges with could be weak spots during manufacturing, transport or installation of the panels.

[0354] FIG. 24 shows yet another alternative for the detail (500) that can be used in the invention. The upper side edges of the recess (330)— which comprises grouting material (340)—are provided by surfaces of the male edge and of the female edge that comprise curved bevels (431). The side edges of the recess (330) are continuously curved with larger minimum radius of curvature than in the example of FIG. 23, such that they have no sharp edges with could be weak spots during manufacturing, transport or installation of the panels.

[0355] FIG. 25 shows a variant for the detail (500) that can be used in the invention. The panels comprise a substrate (304) and a top layer (302). The top layer comprises a decor layer and optionally a wear layer. The upper side edges of the recess (330)— which comprises grouting material (340)—are provided by surfaces of the male edge and of the female edge that comprise slightly curved bevels (431). The bevels comprise the top layer (302).

[0356] FIG. 26 shows a view according to XXVI-XXVI of the configuration of FIG. 25. The view shows a section through the bevel, perpendicular to the surface of the floor covering and parallel with the edge of the panel where the bevel is provided. FIG. 26 shows the grouting material (340), the substrate (304) and the top layer (302). The surface (598) of the top layer in the bevel—and preferably also the bottom (599) of the top layer in the bevel—has an irregular surface. Such bevels provide a more realistic imitation of a ceramic tile.

[0357] The features shown in FIGS. 20-26 can also be implemented in any embodiment of the first, second, third, fourth, fifth and sixth aspect of the invention.

[0358] The embodiments illustrated in the drawings show floor coverings and floor panels. In the same way as illustrated for floor coverings and floor panels, the invention relates to wall panels and wall coverings. The difference relates to it that floor panels are installed with the surface of the panels in a horizontal surface; whereas wall panels are installed with their surface parallel with the wall, which is vertical or inclined. The reader will understand how to convert horizontal and vertical directions—as described in the invention and as described in the examples of floor panels and floor coverings shown in the drawings—to wall panels and wall coverings.

[0359] FIG. 27 illustrates an embodiment of a floor covering according to the eighth aspect of the invention. The floor covering comprises floor panels (690), an elastic strip (692) and a flexible sealing agent (694). The floor panels (691), and in the example also the elastic strip (692), are provided on a subfloor (691). The elastic strip (692) is provided adjacent to and in contact with an edge (693) of the floor covering. The flexible sealing agent (694) is provided on top of the elastic strip (692). The flexible sealing agent (694) is provided adjacent to and in contact with the edge (693) of the floor covering. The elastic strip (692) and the flexible sealing agent (694) are provided between an edge (693) of the floor covering and a wall (698). The flexible sealing agent (694)— and in the example also the elastic strip (692) contact the wall (698). The flexible sealing agent (694) seals the gap between the edge (693) of the floor covering and the wall (698). A skirting board (696) is positioned onto the floor panels providing the edge of the floor covering, and onto the wall (698). The skirting board (696) covers the elastic strip (692) and the flexible sealing agent (694). As an example, the thickness of the floor panel (690) can be 5 mm and the gap between the edge (693) of the floor covering and the wall (698) is 8 mm.

[0360] FIG. 28 shows the cross section of yet another example of floor covering according to aspects of the invention. FIG. 28 shows a floor covering comprising floor or wall panels (200). The panels comprise a substrate (204) and a top layer (not shown in FIG. 28). The top layer comprises a decor layer, and optionally a wear layer. The panels are provided at least at the edges (210, 220) of two opposite sides with coupling parts, cooperating which each other, substantially in the form of male coupling parts (212) and female coupling parts (214), for coupling the panels to each other in the floor or wall covering. The male coupling part (212) is provided at the male edge (210) of the panels. The female coupling part (214) is provided at the female edge (220) of the panels. The coupling parts are provided with integrated mechanical locking means which prevent the drifting apart of two coupled panels into the direction perpendicular to the surface of the floor or wall covering and/or into the direction perpendicular to the respective edges in the plane of the floor or wall covering.

[0361] A recess (230) is provided at the surface of the floor or wall covering between two panels mechanically coupled to each other by the male coupling part and the female coupling part. The recess (230) comprises a grouting material (240).

[0362] The male coupling part is provided by a downward-directed upper hook-shaped part (270). The downward-directed upper hook-shaped part (270) comprises a lip (271) with a downward-directed locking element (272) which forms a male part.

[0363] The female coupling part is provided by an upward-directed lower hook-shaped part (275). The upward-directed lower hook-shaped part (275) comprises a lip (276) with an upward-directed locking element (277), which, proximally thereof, defines a female part in the form of a third recess (278).

[0364] The male coupling part and the female coupling part are configured such that two of such panels can be coupled to each other at their respective edges by means of a movement (M) perpendicular to the surface of the panels of the one panel in respect to the other, such that the panels are locked in the plane of the panels and perpendicular to the respective edges.

[0365] In coupled condition of the male coupling part (212) of a panel with the female coupling part (214) of another panel, a locking in vertical direction is provided at the distal end of the downward-directed locking element (272) of the panel.

[0366] The grouting material (240) contacts part of the upper surface of the downward-directed locking element (272). The male edge and the female edge each comprise an undercut (392, 393), wherein each of these undercuts comprise grouting material (240).

[0367] No vertical locking is provided between coupled panels at the proximal end of the upward-directed locking element (277) nor at the proximal end of the downward-directed locking element (272). However, it is preferred when the proximal end of the upward-directed locking element (277) contacts the proximal end of the downward-directed locking element (272) with pretension at their contact surfaces (586, 587).

[0368] In coupled condition of the male edge of a panel with the female edge of another panel, a locking in vertical direction is provided at the distal end of the upward-directed locking element (277). The distal end of the upward-directed locking element (277) comprises an undercut (412). The panels comprise at the proximal edge of their male edge a corresponding hook (413). The corresponding hook (413) is provided for interacting with the upward-directed locking element (277) of a coupled panel for establishing a locking in vertical direction.

[0369] The bottom surface of the undercut (412) is provided for establishing a locking in vertical direction. In the example shown in FIG. 28, the upward-directed locking element (277) can be locked at the proximal edge of the panel with which it is coupled at the distal end of the upward-directed locking element (277) and wherein the distal end of the upward-directed locking element (277) comprises an undercut (412) and the upward-directed locking element (277) can be locked at the proximal edge of the panel with which it is coupled at the undercut of the upward-directed locking element (277).

[0370] This also results in a locking in horizontal direction between neighboring panels provided by contact between coupled panels at the distal end of the downward-directed locking element (277).

[0371] The panels of the embodiment shown in FIG. 28 can be installed at their first set of opposite edges via a vertical push movement (M).

[0372] The embodiments of FIGS. 29 and 30 are to a large extend similar to the embodiment of FIG. 28. The difference between FIGS. 28, 29 and 30 is the position of establishment of the recess (230). In the embodiment of FIG. 28, the recess (230) is established by a recess (232) in the male edge of the panel. In the embodiment of FIG. 29, the recess (230) is established as a recess (234) at the female edge of the panels (200). In the embodiment of FIG. 30, the recess (230) comprises a first recess (234) cut out or otherwise provided at the female edge, through the top layer and extending into the substrate; and a second recess (232) cut out or otherwise provided at the male edge through the top layer and extending into the substrate.

[0373] The panels shown in the embodiment of FIGS. 28, 29 and 30 can be rectangular, square or oblong. They can be provided at the second set of opposite edges with coupling parts as in any embodiment of any aspect of the invention.

[0374] FIG. 31 shows an example of a panel comprising a groove provided between and parallel with the two opposite sides comprising coupling parts. FIG. 31 shows a panel which is to a very large extent similar to the panel shown in FIG. 1. The reference numerals in FIG. 31 have the same meaning as in FIG. 1. Contrary to the panel shown in FIG. 1, the panel shown in FIG. 31 comprises inclined bevels 430 at its edges 110, 120. The panels comprise on their surface a groove 810, provided between and parallel with the two opposite edges 110, 120 that comprise coupling parts. The groove 810 is provided for receiving grouting material after installation of a plurality of such panels in a covering, e.g. in a floor covering.

[0375] The groove 810 of the panel shown in FIG. 31 comprises at both its side surfaces undercuts 811, provided for improved anchoring of grouting material. The width of the upper surface of the groove is dimensioned such that after installation of a plurality of such panels, the upper surface of the groove has substantially the same width as the upper surface of the recess.

[0376] Both sides of the groove 810 are provided with inclined bevels 830. The bevels 830 are dimensioned equal to the bevels 430 at the edges of the panels. Although FIG. 31 illustrates inclined bevels, other types of bevels can be provided, preferably wherein the bevels provided at both sides of the groove are substantially similar to the bevels at both edges of the panel. Bevels as described in this document and as shown in the other figures can be used.

[0377] The groove 810 is provided in the middle between the recesses at both edges of the pair of opposite edges provided with coupling parts, this way, the groove is positioned such that in a covering the groove will be positioned in the middle between (meaning equidistant from) the recesses at both edges of the panel.

[0378] FIG. 32 shows in enlarged representation a detail F32 of the cross section of the groove of FIG. 31.

[0379] FIGS. 33-41 show in a similar view as FIG. 32 alternative cross sections for grooves 810 provided between and parallel with opposite sides comprising coupling parts. The grooves 810 of FIGS. 33, 34, 35, 37, 38, 39 and 41 comprise undercuts 811. The groove 810 of FIG. 41 is at both sides provided with a protrusin 812 to improve anchoring of grouting material in the groove 810. The grooves of FIGS. 37, 38, 39, 40 and 41 are provided with bevels 830 at both sides. These figures show inclined bevels, however, other types or configurations of bevels can be used as well.

[0380] The groove 810 of FIG. 33 is shown comprising grouting material 140; wherein the grooves in the FIGS. 34-41 is shown without grout.

[0381] FIGS. 42 and 43 represent panels—in top view—comprising grooves produced between and parallel with opposite sides comprising coupling parts.

[0382] The rectangular and oblong panel 100 shown in FIG. 42 is provided at the edges 110, 120 of a first pair of opposite sides with coupling parts, e.g. as represented in other figures. The coupling parts are provided for coupling the panels to each other, e.g. in a floor or a wall covering. The panel is configured, such that after coupling the panels, a recess will be provided at the surface of the floor or wall covering between two panels mechanically coupled to each other at the edges of the first pair of opposite sides. Theses recesses can be grouted with grouting material.

[0383] The panel 100 comprises on its surface three grooves 810, between and parallel with the two opposite edges 110, 120 comprising coupling parts. The grooves 810 are located such that they are equidistant with each other and with the recess that will be provided at both edges after coupling panels to each other. The grooves delimit a first decoration pattern 841 from a second decoration pattern 842. However, it is also possible that the full surface of the panel is provided with the same decoration pattern. After installation of the panels, the grooves can be grouted. The length of the panel equals four times its width.

[0384] The rectangular and oblong panel 100 of FIG. 42 comprises a second set of opposite sides, wherein the edges 110A, 120A of the second set of opposite sides comprise coupling parts. The coupling parts are provided for coupling two such panels to each other in a floor covering at their second set of opposite sides. The second set of opposite sides are configured such that a recess will provided at the surface of the floor or wall covering between two panels mechanically coupled to each other at the second set of opposite sides. After installation of the panels a grouting material can be provided in these recesses at the second set of opposite sides.

[0385] FIG. 43 illustrates an example of a square panel 100. It is provided at the edges 110, 120 of a first pair of opposite sides with coupling parts, e.g. as represented in other figures. The coupling parts are provided for coupling the panels to each other, e.g. in a floor or a wall covering. The panel is configured, such that after coupling the panels, a recess will be provided at the surface of the floor or wall covering between two panels mechanically coupled to each other. Theses recesses can be grouted with grouting material.

[0386] The panel 100 comprises on its surface a groove 810, between, parallel with, and equidistant from the two opposite edges 110, 120 comprising coupling parts. After installation of the panels, the groove can be grouted.

[0387] The rectangular and oblong panel 100 of FIG. 43 comprises a second set of opposite sides, wherein the edges 110A, 120A of the second set of opposite sides comprise coupling parts. The coupling parts are provided for coupling two such panels to each other in a floor covering at their second set of opposite sides. The edges 110A, 120A of the second set of opposite sides are configured such that a recess will be provided at the surface of the floor or wall covering between two panels mechanically coupled to each other at the second set of opposite sides. After installation of the panels a grouting material can be provided in this recess at the second set of opposite sides.

[0388] The panel 100 comprises on its surface a second groove 810A, provided between, parallel with and equidistant between the second set of opposite sides comprising coupling parts. After installation of such panels 100, the second groove 810A can be grouted.

[0389] The grooves 810, 810A separate a first decoration pattern 841 from a second decoration pattern 842. However, it is also possible that the full surface of the panel is provided with the same decoration pattern.

[0390] FIG. 44 illustrates a floor covering using panels as shown in FIG. 42. Three panels 100 are shown in this covering. The reference numerals have the same meaning as in FIG. 42. Panels are mechanically coupled at the edges 110, 120 of their first pair of opposite sides, or at the edges 110A, 120A of their second pair of opposite sides.

[0391] The recesses 130 at the edges 110, 120 of the first pair of opposite sides, the recesses 130 at the edges 110A, 120A of the second pair of opposite sides, and the grooves 810 have been grouted with the same grouting material 140. The grouting material continues without interruption from grooves 810 to adjoining recesses 130. The panels 100 are configured such that the grooves 810 substantially have the same width as the recesses 130; and such that the recesses 130 in both directions substantially have the same width.

[0392] The grooves 810 of a first panel are aligned with the recess of one of the edges of the pair of opposing edges of a neighboring panel with which the first panel is coupled, or the grooves 810 of the first panel are aligned with grooves 810 of a neighboring panel with which the first panel is coupled. This way, the grooves are provided, and aligned to provide a checkerboard panel in the floor covering. The panel 100 of FIG. 42, used in the floor covering of FIG. 44, comprises two different decoration patterns 841, 842, delimited by the grooves 810. However, it is possible that the panel is provided over its full surface with a same decoration pattern. The floor covering of FIG. 44 appears to be laid with four times more panels than the number of panels used in reality.

[0393] The present invention is not limited to the embodiments that have been described and/or claimed. Combinations can be made of the embodiments and/or claims, as long as these combinations do not cause contradiction, and while staying within the scope of the invention as defined in the claims.