Finishing and roof deck systems containing fibrous mat-faced gypsum boards
First Claim
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1. A plaster lath finishing system for use in a building comprising a support member containing a fibrous mat-faced gypsum board comprising a gypsum core having one or more additives therein which simultaneously improve the water resistance and fire resistance of the core, and a finishing material overlying said board.
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Abstract
Finishing systems and roof decks are provided which include a gypsum board having a set gypsum core faced with a fibrous mat. The gypsum core includes one or more additives which are effective in simultaneously improving the water and fire resistance of the board. In preferred embodiments, the board has sufficient water-resistant additive for absorbing less than about 10% water in an ASTM C-473 test.
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Citations
20 Claims
- 1. A plaster lath finishing system for use in a building comprising a support member containing a fibrous mat-faced gypsum board comprising a gypsum core having one or more additives therein which simultaneously improve the water resistance and fire resistance of the core, and a finishing material overlying said board.
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3. A system comprising a roof deck which includes supporting means and a gypsum board overlying said supporting means, said board comprising:
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(a) a gypsum core having one or more additives therein which improve the water resistance of the core; and (b) a glass fiber mat facing at least one side of said core. - View Dependent Claims (4, 5, 6)
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7. A system comprising a roof deck which includes supporting means and a gypsum board overlying said supporting means, said board comprising:
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(a) a gypsum core having one or more additives therein which improve both the water resistance and fire resistance of the core, one of said additives comprising mineral fibers for improving the fire resistance of the core; and (b) a glass fiber mat facing at least one side of said core. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification