A fastener for a corrugated sheet includes a cylindrical assembly including elongated, plate shaped fastening members assembled as a hollow cylinder, the fastening member tapered to one end to form a hook at one end and having a curved groove on an outer surface, and a curved trough on the outer surface at the other end of the fastening member, the curved troughs assembled to form an annular recess; a retainer ring secured to the annular recess; a ring-shaped elastic member secured to the curved groove; a first sealing member put on the retainer ring; and a washer; a threaded bolt driven through the washer, the retainer ring, and the fastening member; and an expansion nut having a multi-sided outer surface and moveably secured to the threaded bolt.

A fastener for a corrugated sheet includes a cylindrical assembly including elongated, plate shaped fastening members assembled as a hollow cylinder, the fastening member tapered to one end to form a hook at one end and having a curved groove on an outer surface, and a curved trough on the outer surface at the other end of the fastening member, the curved troughs assembled to form an annular recess; a retainer ring secured to the annular recess; a ring-shaped elastic member secured to the curved groove; a first sealing member put on the retainer ring; and a washer; a threaded bolt driven through the washer, the retainer ring, and the fastening member; and an expansion nut having a multi-sided outer surface and moveably secured to the threaded bolt.

A connecting system for boards, and a connecting device and a support element for boards are disclosed. The connecting system includes the support element configured to support at least one board and the connecting device configured to releasably fasten the at least one board to the support element. The support element includes at least one lateral surface with at least one locking member arranged on the lateral surface. The connecting device includes at least one arm with a locking member configured for engagement with the locking member of the support element. At least one of the locking member of the support element and the locking member of the connecting device includes a plurality of protrusions forming a plurality of locking positions of the connecting device relative the support element.

A support arrangement for supporting covering elements on a soffit and/or a fascia of a building. The support arrangement has a backing member that is operable to receive covering elements and is formed at least partially from non-metallic material. The support arrangement further has an attachment means for attaching the support arrangement to a building or building component such that it forms a part of the building. The support arrangement is non-flammable and can easily receive fixings to fix covering elements thereto. Covering elements can be fixed to the support arrangement and then the arrangement can be attached to a building or building component such that the covering elements form a part of the soffit or fascia of the building.

A building panel is constructed of a corrugated material. The panel can be folded into a U-shaped configuration. Successive folded panels can be coupled together using complementary shaped corrugations to fix panels in position relative to each other. Shaped connectors can be used to connect building panels in one plane to building panels in another plane.

A building panel is constructed of a corrugated material. The panel can be folded into a U-shaped configuration. Successive folded panels can be coupled together using complementary shaped corrugations to fix panels in position relative to each other. Shaped connectors can be used to connect building panels in one plane to building panels in another plane.

In one aspect there is disclosed a waterproofing building product (10) for use in waterproofing a joint (12) between a first and second roofing panel (14, 16). The waterproofing building product (10) includes an overlapping section (18) operatively adapted to overlap a portion of the first roofing panel (14) and an underlapping section (20) operatively adapted to underlap a portion of the second roofing panel (16). The waterproofing building product (10) further includes a transition section (22) located between the overlapping section (18) and the underlapping section (20) and connecting the overlapping section (18) with the underlapping section (20).

A building panel is constructed of a corrugated material. The panel can be folded into a U-shaped configuration. Successive folded panels can be coupled together using complementary shaped corrugations to fix panels in position relative to each other. Shaped connectors can be used to connect building panels in one plane to building panels in another plane.

A building panel is constructed of a corrugated material. The panel can be folded into a U-shaped configuration. Successive folded panels can be coupled together using complementary shaped corrugations to fix panels in position relative to each other. Shaped connectors can be used to connect building panels in one plane to building panels in another plane.

A roof pan with raised ridges along lateral edges, where the raised ridges of one pan cooperate raised ridges of another pan to prevent water movement. A formed edge that is offset from the roof surface when the pan is installed on the roof allows a flashing to slide under the formed edge when the roof pan is installed on the roof surface.