A set of panels including first and second panels. The first and second panels respectively include first and second edges. The first edge includes a locking strip with a locking element configured to cooperate with a locking groove at the second edge for locking the first edge to the second edge. The locking element includes a first locking surface at a first angle from a plane parallel to the first panel surface and the locking groove includes a second locking surface at a second angle from a plane parallel to the third panel surface. The first angle is different from the second angle such that the first locking surface converges towards the second locking surface at a cooperation part in a locked position. The first locking surface cooperates with the second locking surface at the cooperation part.

A building panel, such as a floor panel or wall panel, has a first mechanical locking device at a respective first edge 11 and an opposite second edge, such as long edges, for horizontal and vertical locking of similar or essentially identical building panels in an assembled position. The building panel further has a second mechanical locking device at a respective third edge and an opposite fourth edge for horizontal and vertical locking of similar building panels or essentially identical building panels in an assembled position. The first mechanical locking device includes, at the first edge, a tongue groove 111 configured to receive a first locking tongue at the second edge.

A set of essentially identical floorboards each including a front face and a rear face extending in the horizontal plane, a core, and a surface layer, a mechanical locking system is arranged at least at two opposite edges for connecting a floorboard with an adjacent floorboard in a horizontal and a vertical direction, said mechanical locking system being configured for connecting the floorboard with the adjacent floorboard by vertical folding, wherein one of said opposite edges is provided with a horizontally extending protrusion at an upper edge, and wherein said protrusion is configured to overlap a surface groove at an upper edge of the other of said opposite edges, such that two connected and adjacent floorboards have upper overlapping edges.

A building panel, such as floor panel, including a core, the panel further including an upper arrangement being attached to an upper side of the core and/or a lower arrangement being attached to a lower side of the core. At least one of the core, the upper arrangement and lower arrangement is mineral-based, and at least one of upper and/or lower arrangement includes at least one rigid layer. The rigid layer includes at least one of an impact modifier or an acrylic processing aid.

A set of essentially identical panels, such as building panels, provided with a mechanical locking system including a displaceable tongue, which is arranged in a displacement groove with a first opening at a first edge of a first panel. The displaceable tongue is configured to cooperate with a first tongue groove, with a second opening at a second edge of an adjacent second panel, for vertical locking of the first and the second edge. The height of the first opening is greater than a second height of the second opening.

Floor panels are shown, which are provided with a mechanical locking system on long and short edges allowing installation with angling of long edges and where the short edge locking system has a displaceable tongue that is displaceable essentially in one direction from an inner unlocked position to an final locked position.

A set of essentially identical floorboards each including a front face and a rear face extending in the horizontal plane, a core, and a surface layer, a mechanical locking system is arranged at least at two opposite edges for connecting a floorboard with an adjacent floorboard in a horizontal and a vertical direction, said mechanical locking system being configured for connecting the floorboard with the adjacent floorboard by vertical folding, wherein one of said opposite edges is provided with a horizontally extending protrusion at an upper edge, and wherein said protrusion is configured to overlap a surface groove at an upper edge of the other of said opposite edges, such that two connected and adjacent floorboards have upper overlapping edges.

Floorboards provided with a mechanical locking system including a locking strip protruding from a first edge of a first floorboard. The locking strip is provided with a locking element configured to cooperate with a locking groove at a lower side of a second edge of a second floorboard for locking the first edge and the second edge in a horizontal direction. The first edge and the second edge are configured to be assembled by a vertical downward motion of the second edge towards the first edge. The second edge is provided with a calibrating groove adjacent the locking groove. Also, a method for producing a mechanical locking system.

A set of essentially identical panels, such as building panels, provided with a mechanical locking system including a displaceable tongue, which is arranged in a displacement groove with a first opening at a first edge of a first panel. The displaceable tongue is configured to cooperate with a first tongue groove, with a second opening at a second edge of an adjacent second panel, for vertical locking of the first and the second edge. The height of the first opening is greater than a second height of the second opening.

An external cladding system includes at least one panel of sheet material, a series of vertically and horizontally oriented panel mounting extrusions, and a number of spaced apart apertures passing through a topmost/bottom most horizontal panel mounting extrusions on a wall. The apertures extend along a longitudinal axis of an internal horizontal portion of the topmost and bottom-most panel mounting extrusions. In use, the at least one panel is held in place on the panel mounting extrusions via: capping extrusions and resilient sealing strips, which are located between the panel and the capping extrusions. One or more spacer elements are located on the horizontally-oriented panel mounting extrusions, which support the bottom edge of a panel.