ROOF STRUCTURE AND ROOF ELEMENT

Abstract

Roof structure, which comprises load bearing roof beams, the longitudinal direction of which roof beams defines the width direction of the roof, roof boards and a first fastening profile and a second fastening profile, which lock to each other in the joint between two roof boards arranged against each other, whereby the first roof board comprises a first fastening profile and the second roof board comprises a second fastening profile, and which fastening profiles are substantially perpendicular to the load bearing roof beams, and which fastening profiles are continuous along the distance between at least two adjacent load bearing roof beams. Furthermore, the invention comprises a roof element suitable to be used in a roof structure.

Claims

1. Roof structure, which comprises load bearing roof beams having a longitudinal direction defining width direction of the roof, roof boards, which boards comprise a planar outer surface, a planar inner surface two long side edges, to short side edges, and a core layer manufactured from a thermal insulation material, the core layer located between the planar inner and outer surfaces, and having a compression strength of at least 10 kPa, and a first fastening profile and a second fastening profile, which lock to each other in joint between two roof boards arranged against each other, whereby first of the two roof boards comprises the first fastening profile and second of the two roof boards comprises the second fastening profile, and which fastening profiles are substantially perpendicular to the load bearing roof beams, and which fastening profiles are continuous along the distance between at least two adjacent load bearing roof beams.

2. Roof structure according to claim 1, wherein the core layer of the roof boards is made of extruded polystyrene (XPS), expanded polystyrene (EPS), polyurethane (PIR/PUR) or phenolic foam.

3. Roof structure according to claim 1, wherein the outer surface of the roof boards comprises a structure layer, which comprises concrete, mortar or similar casting compound, which comprises binding agent and inorganic material, a gypsum board, sheet metal, reinforced plastic or a corresponding building board, and/or fibre fabric treated with waterproofing material.

4. Roof structure according to claim 1, wherein the inner surface of the roof boards comprises an interior lining layer, which comprises concrete, mortar or similar casting compound, which comprises binding agent and inorganic material, and/or a timber lining, a gypsum board, a wind protection sheet, an acoustic board or other building board.

5. Roof structure according to claim 1, wherein the first fastening profile and the second fastening profile are arranged against each other so that the second fastening profile of the roof board arranged above in the width direction of the roof locks to the first fastening profile of the roof board underneath.

6. Roof structure according to claim 1, wherein the first fastening profile and the second fastening profile are fastened to the long side edges of the roof boards so that one long side edge of the roof board comprises a first fastening profile and the second long side edge comprises a second fastening profile.

7. Roof structure according to claim 1, wherein the first and the second fastening profile are steel profiles, preferably hot-galvanized steel profiles.

8. Roof structure according to claim 1, wherein the core layer of the roof boards comprises grooves on its planar surface which is against the outer surface, substantially on the area of the entire planar surface.

9. Roof structure according to claim 1, wherein a water tight roofing material is arranged on the outer surface of the roof boards.

10. A roof element, which comprises two or more roof boards arranged tightly against each other in the width direction of the element and in the longitudinal direction of the element, which roof boards comprise a planar outer surface, a planar inner surface two short side edges, two long side edges, and a core layer manufactured from a thermal insulation material between the surface layers, the compression strength of which core layer is at least 10 kPa, and a first fastening profile a second fastening profile in the joint between the roof boards arranged against each other, which fastening profiles are fastened to the long side edges of the roof boards so that the first fastening profile and the second fastening profile are locked against each other, and which fastening profiles are continuous in the longitudinal direction of the element.

11. Roof element according to claim 10, wherein the core layer of the roof boards is made of extruded polystyrene (XPS), expanded polystyrene (EPS), polyurethane (PIR/PUR) or phenolic foam.

12. Roof element according to claim 10, wherein the outer surface of the roof boards comprises a structure layer, which comprises concrete, mortar or similar casting compound, which comprises binding agent and inorganic material, a gypsum board, sheet metal, reinforced plastic or a corresponding building board, and/or fibre fabric treated with waterproofing material.

13. Roof element according to claim 10, wherein the inner surface of the roof boards comprises an interior lining layer, which comprises concrete, mortar or similar casting compound, which comprises binding agent and inorganic material, and/or a timber lining, a gypsum board, a wind protection sheet, an acoustic board or other building board.

14. Roof element according to claim 10, wherein the first and the second fastening profile are steel profiles, preferably hot-galvanized steel profiles.

15. Roof element according to claim 10, wherein the core layer of the roof boards comprises grooves on its planar surface which is against the outer surface, substantially in the area of the entire planar surface.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In the following, the invention will be described in more detail with reference to the appended drawings, in which

[0043] FIG. 1 shows a structure of the roof boards to be used in a roof structure according to the invention, and

[0044] FIG. 2 shows another structure of the roof boards.

DETAILED DESCRIPTION OF THE INVENTION

[0045] Same reference numbers have been used in the Figures for describing parts corresponding to each other.

[0046] FIG. 1 shows two roof boards 1,1 according to an embodiment of the invention fastened to each other. The roof boards 1, 1 fastened to each other may form a roof element 10 or they may be fastened to each other only on the construction site. FIG. 1 shows a cross-section of the roof boards 1, 1 seen from the direction of the short side edge of the boards. The roof board 1, 1 comprises a planar outer surface 2, a planar inner surface 3 and a core layer 4 manufactured from a thermal insulation material between the surface layers 2, 3. The outer surface 2 of the roof board typically comprises a structure layer and the inner surface 3 comprises an interior lining layer, i.e. the roof board 1, 1 is a so-called sandwich structure element. The long side edges of the roof board 1, 1 comprise a first fastening profile 5, 5 and a second fastening profile 6, 6 so that on the opposite long edge sides of one board there is a first fastening profile 5, 5 and a second fastening profile 6, 6. When arranging two roof boards 1, 1 against each other, the first fastening profile 5, 5 and the second fastening profile 6, 6 lock to each other in the joint between the roof boards 1, 1. In this case, the first roof board 1 comprises a first fastening profile 5, and the second roof board 1 comprises a second fastening profile 6, which lock to each other in the joint point between the boards. The water tight roofing material 7 can be installed directly on the outer surface 2 of the roof board.

[0047] FIG. 2 shows two roof boards 1,1 according to another embodiment of the invention fastened to each other. The roof boards 1, 1 fastened to each other may form a roof element 10 or they can be fastened to each other only on the construction site. The roof boards are otherwise the same as in FIG. 1, but in this embodiment the core layer 4 manufactured from a thermal insulation material comprises grooves 8, 8 on its planar surface which is against the outer surface 2, substantially on the area of the entire planar surface. This way, it has been possible to form ventilation gaps to the structure of roof board 1, 1.

[0048] In FIGS. 1 and 2, two roof boards 1, 1 are arranged against each other in the width direction A of the roof element 10, in the joint between which roof boards the first fastening profile 5 and the second fastening profile 6 are locked to each other. The first fastening profile and the second fastening profile are fastened to the edge sides of the roof boards. The fastening profile may be fastened to the board so that a part of it penetrates inside the thermal insulation material, for example the fastening profile may be U-shaped having spikes penetrating inside the board as shown in the Figures. The fastening profile additionally has a shape that enables locking with another fastening profile, and the fastening profile being arranged to the side edge so that the locking form is on the edge side of the roof board.

[0049] The invention is not intended to be limited to the above-presented exemplary embodiments, but the intention is to apply the invention widely within the inventive idea defined by the claims defined below.