A weather resistive barrier (WRB) for the exterior protection of building substrates can have a water vapor permeability that decreases with increasing temperature. In an embodiment, the WRB includes a coating comprising a LCST polymer, and may further include a second polymer. The WRB can be part of a building assembly, part of a sheet, or a sheet itself, the sheet having an air permeability of less than 0.02 L/(s m.sup.2) at a pressure of 75 Pa. Furthermore a liquid coating composition can include a LCST polymer and a second polymer, wherein the liquid coating composition can be adapted that a solid coating formed by the liquid coating composition has an air permeability of less than 0.02 L/(s m.sup.2) at a pressure of 75 Pa and a water vapor permeability that decreases with increasing temperature.

A board with preformed seals. In an exemplary embodiment, a sealing material is applied to at least one edge of a board to form a preformed seal on that edge. The board is configured such that when the board is attached to a frame adjacent to a another board, at least a portion of the sealing material applied to the edge of the board seals against at least a portion of an edge another board. In one exemplary embodiment, the boards are configured to seal against edges of substantially identical boards. A plurality of the sheathing boards may be installed on a building frame to form a sheathing system that provides a moisture and/or gas barrier between and interior and exterior of a building.

An impact resistant exterior sheathing gypsum building panel with an integrated impact resistant woven mesh which protects against impact from projectiles such as those conveyed by hurricane force winds is provided. Methods for manufacturing these exterior sheathing gypsum building panels with an integrated impact resistant woven mesh are also provided. An exterior sheathing system employing the exterior sheathing cementitious building panel is provided.

A building material having a caulking on a shiplap portion. The caulking is covered with a caulking-coating film. The building material demonstrates superior cuttability and adhesion with the shiplap portion and demonstrates almost free of staining caused by bleeding of the oil and the like. The caulking preferably contains either a styrene-based block copolymer resin, or a mixture of an olefin-based resin and an adhesive resin. A method for producing the building material includes a step of heating a caulking material to a temperature equal to or higher than a softening point of the caulking material, a step of forming a bead-like caulking by applying the heated caulking material onto a shiplap portion formed in a base material, and a step of coating the caulking with a caulking-coating material.

An exterior wall cladding system for application to an exterior wall surface comprises a sealed and laminated waterproof wrap applied to the exterior wall surface, a fully-sealed insulating panel without a drainage plane disposed over the sealed and laminated waterproof wrap. The cladding system and method provide a waterproof wall structure for a multi-layer stucco coating applied over the insulating panel. Sealing materials are applied to all openings through and edges of the wall structure.

A board with preformed seals. In an exemplary embodiment, a sealing material is applied to at least one edge of a board to form a preformed seal on that edge. The board is configured such that when the board is attached to a frame adjacent to a another board, at least a portion of the sealing material applied to the edge of the board seals against at least a portion of an edge another board. In one exemplary embodiment, the boards are configured to seal against edges of substantially identical boards. A plurality of the sheathing boards may be installed on a building frame to form a sheathing system that provides a moisture and/or gas barrier between and interior and exterior of a building.

An exterior wall cladding system for application to an exterior wall surface comprises a sealed and laminated waterproof wrap applied to the exterior wall surface, a fully-sealed insulating panel without a drainage plane disposed over the sealed and laminated waterproof wrap, and a multi-layer stucco coating applied over the insulating panel. Sealing materials are applied to all openings through and edges of the wall structure.

A composite wall, ceiling or floor panel (10), system and method, including a sheet (14) having a first face (18) including at least one first mounting portion (16), and at least one formwork member (20) with at least one second mounting portion (30) arranged to engage with the first mounting portion of the sheet to retain the sheet and said at least one formwork member together. Structural support comes from piers (for a wall) or beams (ceiling or floor) formed in the spacing between adjacent formwork members. The formwork members act as the core of a wall, ceiling or floor panel. An external coating (123) is applied to the formwork members, such as spray shotcrete or render. Channels (28) formed by the formwork members defines integrated ducting for services to be run.

A waterproof board for use as a backing surface comprising a top face, a bottom face, a plurality of sides, a core layer having a thickness of about 5 millimeters, and a sound layer having a thickness of about 2 millimeters. The sound layer is generally interconnected to the core layer. The core layer may comprises at least two faces, either of which may comprise a textured surface. The textured surface may comprise either a substantially smooth finish or a substantially abrasive finish. The core layer comprises a densified foam material having a density of 490 kg/m.sup.3 to about 520 kg/m.sup.3, and a specific material composition, both of which enhance waterproofing and attain an optimal balance between rigidity and severability.

Described herein is a stain and sag resistant acoustic building panel comprising a porous body formed from building material and latex binder, wherein the building material may include fibers and filler and at one of the building materials has been pre-treated with a charge-modifying component, thereby enhancing the sag-resistance of the building panel.