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KNAPP RESIDENCE OUTLINE SPECIFICATIONS <br /> SECTION 09250 - GYPSUM DRYWALL <br /> A. PROJECT INCLUDES <br /> 1 . Gypsum Drywall Systems : <br /> a . Interior walls, partitions, and ceilings for tape and <br /> joint compound finish. <br /> b. Cementitious backer units for application of tile . <br /> 2 . Gypsum Drywall Attachment : <br /> a . Gypsum board screwed to wood framing and furring. <br /> B. QUALITY ASSURANCE <br /> 1 . Performance: Fire, structural, and seismic performance <br /> meeting requirements of building code and local authorities . <br /> C. PRODUCTS <br /> 1 . Gypsum Board: <br /> a . Gypsum Wallboard: ASTM C 36, regular, foil-backed, and <br /> fire-rated types, 1/2 and 5/8 inch typical thickness . <br /> b. water-Resistant Gypsum Backing Board: ASTM C 630 , <br /> regular and fire-rated types, 5/8 inch typical <br /> thickness . <br /> c . Joint Treatment : ASTM C 475 and ASTM C 840, 3-coat <br /> system. <br /> d. Installation Standard: ASTM C 840 . <br /> 2 . Cementitious Backer Units : <br /> a . Type: ANSI A 108 . 1, cement-coated portland cement <br /> panels . <br /> b. Thickness : 5/8 inch nominal . <br /> 3 . Trim Accessories : <br /> a . Material : Metal trim. <br /> b. Types : Cornerbead, special edge trim, and control <br /> joints . <br /> 4 . Auxiliary Materials : <br /> a. Gypsum board screws, ASTM C 1002 . <br /> b. Polyethylene vapor retarder, 6 mils . <br /> END OF SECTION <br /> DIVISION 9 - FINISHES PAGE 9-2 <br />