A wall assembly including: a plurality of stud assemblies, each of the stud assemblies including a plurality of metal studs, the stud assemblies being spaced apart from each other and forming a window opening therebetween; a sill wedge connected between the stud assemblies and forming a lower edge of the window opening; and a board layer extending around a periphery of the window opening and being attached to the stud assemblies.

Wall structures and methods of manufacturing wall structures are described in this specification. The wall structures include a frame, a sheathing board attached to the frame, a penetration attachment panel, and a foam layer.

A partition is adapted to support a fixture and has a front surface to which the fixture may be affixed and a back surface that faces away from the fixture. The partition comprises a plasterboard and a reinforcing board, the reinforcing board being located between the plasterboard and the front surface, and the plasterboard comprising at least 1 wt % fibre and at least 1 wt % polymer is additive.

A stair system according to one illustrative embodiment comprises: a support body mountable in a wall and comprising a connecting region; a stair body; and a mounting apparatus. The mounting apparatus comprises: a connector connectable to the connecting region of the support body in any one of a plurality of different positions in the connecting region of the support body; and a holder configured to hold the stair body such that when the connector is connected to the connecting region of the support body, the stair body is spaced apart from the support body to permit a wall panel between the stair body and the support body. Wall assemblies comprising such stair systems are also disclosed.

A stair system according to one illustrative embodiment comprises: a support body mountable in a wall and comprising a connecting region; a stair body; and a mounting apparatus. The mounting apparatus comprises: a connector connectable to the connecting region of the support body in any one of a plurality of different positions in the connecting region of the support body; and a holder configured to hold the stair body such that when the connector is connected to the connecting region of the support body, the stair body is spaced apart from the support body to permit a wall panel between the stair body and the support body. Wall assemblies comprising such stair systems are also disclosed.

A sound isolation assembly comprising: one or more backing plates; one or more acoustic isolators; and a backing block. The acoustic isolators may be secured between the backing plates and the backing block when the backing plates are fastened to the backing block. When the backing plates are fastened to the backing block, the backing plates are substantially prevented by the acoustic isolators from being in direct contact with the backing block. The acoustic isolators may be fastened to the studs. The sound isolation assembly, when installed in a wall that is supporting a heavy load, raises the Sound Transmission Class rating of that wall.

Wall structures and methods of manufacturing wall structures are described in this specification. The wall structures include a frame, a sheathing board attached to the frame, a penetration attachment panel, and a foam layer.

A method of installing a panel member on a frame assembly includes the steps of providing a panel member having inner and outer surfaces and providing one or more positioning assemblies on the inner surface of the panel. The positioning assemblies each having an adjustable positioning member adapted to engage a portion of the frame assembly. The method further includes setting the positioning members to determine a registration point for the panel member along the frame assembly. One or more driving assemblies are then provided on the inner surface of the panel, each having a biasing member adapted to engage a portion of the frame assembly to drive the panel member towards the registration point on the frame assembly.

A backing panel includes a first stud interfacing portion for nesting in a first stud and a second stud interfacing portion for coupling with a second stud, such that a web surface of the backing panel is flush with a surface of the first stud and a surface of the second stud.