An exterior sheathing cementitious panel which prevents water penetration and air leakage is provided. Methods for manufacturing exterior sheathing cementitious panels with a highly efficient integrated air/water barrier sheet are also provided. An exterior sheathing system employing the exterior sheathing cementitious panel is provided.

A composite nonwoven mat and a method of making a composite nonwoven mat are provided. The composite nonwoven mat includes a nonwoven base layer having a first surface and a second surface, and a coating layer formed on, penetrating into, and adhered to the first surface of the nonwoven base layer. The coating layer includes a polymer material and a carrier composition. The composite nonwoven mat has an average Gurley porosity of at least 500 seconds.

A plasterboard comprising a gypsum matrix having wood particles embedded therein in an amount of at least 2 wt % relative to the gypsum, the gypsum matrix further comprising glass fibres in an amount of at least 1 wt % relative to the gypsum.

A fabric composite for a gypsum underlayment sound control mat includes a first layer including a spunbond polyolefin layer, a second layer including a nonwoven polyolefin layer, and a hot-melt adhesive layer between and bonding the first layer and the second layer. A gypsum underlayment sound control mat may include the fabric composite bonded to an entangled mesh layer. A flooring system may include a gypsum or gypsum-concrete underlayment over the fabric composite or the mat. The fabric composite may be free of halogenated agents.

Disclosed is a composite gypsum board comprising a board core and a concentrated layer, as well as related methods of preparing board and slurries. The board core and the concentrated layer both are formed from water and stucco. The concentrated layer is designed to have higher density and/or nail pull than the core. The concentrated layer is further formed from a polysaccharide that forms a complex with calcium ions, e.g., an alginate compound such as sodium alginate. In some embodiments, the concentrated layer is formed from an enhancing additive to enhance strength therein, while the core is formed without using enhancing additive or less enhancing additive than used in forming the board core.

A method for making an accessory cladding element for use in architecture and design. The method provides preparing an elastically deformable support element, including a first outer surface, in particular a decorated surface, a second outer surface and a plurality of spacer elements placed between the two surfaces. An impermeable and removable layer is applied on the first outer surface to protect at least a part thereof. Then a fluid cement mixture is prepared and introduced into the support element to obtain a cement-based composite structure in a deformable state. The excess fluid cement mixture is removed from the support element. The cement-based composite structure in the deformable state is positioned in a forming device which gives it the desired shape. The composite structure is solidified and after the removable layer is removed.

A method for making an accessory cladding element for use in architecture and design. The method provides preparing an elastically deformable support element, including a first outer surface, in particular a decorated surface, a second outer surface and a plurality of spacer elements placed between the two surfaces. An impermeable and removable layer is applied on the first outer surface to protect at least a part thereof. Then a fluid cement mixture is prepared and introduced into the support element to obtain a cement-based composite structure in a deformable state. The excess fluid cement mixture is removed from the support element. The cement-based composite structure in the deformable state is positioned in a forming device which gives it the desired shape. The composite structure is solidified and after the removable layer is removed.

A plasterboard comprising a gypsum matrix having wood particles embedded therein in an amount of at least 2 wt % relative to the gypsum, the gypsum matrix further comprising glass fibres in an amount of at least 1 wt % relative to the gypsum.

A concrete construction made by 3D concrete printing having two or more layers of cementitious material extruded one above the other, and a reinforcing structure reinforcing the two or more layers. The reinforcing structure has at least two flexible longitudinal elongated steel elements running in lengthwise direction, and one or more flexible transverse steel elements forming an angle with the lengthwise direction so that these flexible transverse steel elements are present in the two or more layers. The structure also has a positioning element for positioning the at least two flexible longitudinal elongated elements and the flexible transverse steel elements, a polymer coating or yarns making stitches. The polymer coating or the stitches are applied on the at least two flexible longitudinal elongated steel elements, on the flexible transverse steel elements and on the positioning element thereby making a bond.

Gypsum panels and methods of making gypsum panels are provided. Methods of making gypsum panels include: depositing a first gypsum slurry onto a first surface of a first fiberglass mat; allowing the first gypsum slurry to set to form at least a portion of a gypsum core; and applying a substantially continuous barrier coating comprising a polymer binder to a second surface, opposite the first surface, of the first fiberglass mat, in an amount of from about 1 lb/MSF to about 40 lb/MSF, such that the substantially continuous barrier coating has an average thickness of from about 1 micron to about 100 microns, wherein the substantially continuous barrier coating eliminates at least 99 percent of pin holes present in the exposed second surface of the first fiberglass mat.