A unified building opening extension system is pre-built offsite. The extension system provides an airtight, watertight assembly that is compatible with waterproofing and air barrier systems integrated with the assembly when the opening assembly (e.g. door or window), exterior insulation, and veneer are installed on the building wall. Water intrusion or leaks are resisted even under positive and negative air pressure events (i.e., winds and storms). A baffle plate with a vent hole is fitted to a weep hole in the bottom of a frame of the assembly.

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.

The present disclosure concerns a foundation window assembly comprising a window frame comprising a plurality of frame members, and at least one casing connector arranged on at least one of said plurality of frame members; and a window casing comprising a plurality of casing members defining together a frame-receiving opening, wherein at least one of said plurality of casing members defines a frame-abutting shoulder at least partially delimited by a casing flange portion and a frame-engaging portion. A frame-engaging recess is formed in the frame-engaging portion, the frame-engaging recess at least partially circumscribing the frame-receiving opening, the casing connector being removably engageable into the frame-engaging recess when the window frame is inserted into the frame-receiving opening. The present disclosure also concerns a method for installing a foundation window frame into a foundation wall.

A corner flashing system is provided for sealing the corners of recessed window frames against moisture penetration. In a preferred embodiment, the system comprises first and second double-flap members, a half-cube member, and caulking. The first and second double-flap members, and the half-cube member are preferably made of asphalt or petroleum based material. In another preferred embodiment, the system comprises one double-flap member, a modified half-cube member, and caulking. In another preferred embodiment, the system comprises a single member that combines a double-flap member and a half-cube member, and caulking. In another preferred embodiment, the system comprises a combination member, a double-flap member, and caulking.

A window reveal kit can include a window, a first connector, and at least one reveal trim. The window has an outer side, an inner side, and a frame portion about a perimeter of the window. The first connector can be formed on the frame portion, on the inner side of the window. The at least one reveal trim can have a second connector that is configured to engage the first connector so that the reveal trim extends from the first connector.

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.

Adaptable fenestration frame members, fenestration units using the frame members, and methods of adapting the fenestration frame members. The adaptable fenestration frame members provide a construction that is adaptable for use in both pocket and non-pocket installations by including an adaptation channel forming an outside corner along one edge of the fenestration frame member. Removal of the outside corner converts that portion of the frame member from an outside corner to an inside corner, thus adapting the frame member for use in a pocket installation.

A corner flashing system is provided for sealing the corners of recessed window frames against moisture penetration. In a preferred embodiment, the system comprises first and second double-flap members, a half-cube member, and caulking. The first and second double-flap members, and the half-cube member are preferably made of asphalt or petroleum based material. In another preferred embodiment, the system comprises one double-flap member, a modified half-cube member, and caulking. In another preferred embodiment, the system comprises a single member that combines a double-flap member and a half-cube member, and caulking. In another preferred embodiment, the system comprises a combination member, a double-flap member, and caulking.

A window frame assembly for attachment to a window opening in a support structure, the assembly includes a first frame and a second frame that engage each other from opposite sides of the window opening, wherein the first frame includes a window and at least one abutment member adapted to be fixed to the support structure. The second frame includes at least one abutment member, such as a jamb, a head or a sill. The first frame includes a recess between the at least one abutment member and the window such that, upon engagement of the first frame and the second frame from opposite sides of the window opening, the at least one abutment member of the second frame is received by the recess of the first frame.

A door sill assembly for a door comprises a sill, having a lower portion and an adjustable upper portion positioned on the lower portion. The adjustable upper portion is vertically displaceable relative to the lower portion by movement of an adjuster that is available for manipulation when said door is closed. The door sill assembly may include a threshold. The threshold has a body. The body includes front and rear engagement parts integrally formed thereon to bring about first and second engagements respectively. The release of the second engagement is dependent on that of the first engagement.