Patent ID: 11865820
Assignee: SAINT-GOBAIN ADFORS CANADA, LTD.
Field: Surface technology, coating (Chemistry)
Classification: CPC B  E | IPC B

Claim 15:
16. A cementitious board comprising:
(a) a cementitious core; and
(b) a reinforcing layer disposed on at least one face of the cementitious core; the reinforcing layer comprising an alkali-resistant fabric, a non-porous membrane, and a first non-woven mat, wherein the alkali-resistant fabric comprises a glass fabric laid scrim, wherein the first non-woven mat is directly in contact with the non-porous membrane and the alkali-resistant fabric and wherein the non-porous membrane comprises a polymeric film having a filler content of less than 5 weight % based on the total weight of the polymeric film, the non-porous membrane having a thickness of less than 5 mils, wherein the non-porous membrane has a breaking strength of greater than 170 psi as measured by ASTM D751.