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CHAPEL HILL ORANGE COUNTY VISITORS BUREAU August 12, 2020 <br />308 WEST FRANKLIN, CHAPEL HILL, NC <br />GYPSUM BOARD 092900 - 4 <br />B. Joint Tape: <br />1. Interior Gypsum Wallboard: Paper. <br />2. Exterior Gypsum Soffit Board: Paper. <br />3. Glass-Mat Gypsum Sheathing Board: 10-by-10 glass mesh. <br />4. Tile Backing Panels: As recommended by panel manufacturer. <br />C. Joint Compound for Interior Gypsum Wallboard: For each coat use formulation that is <br />compatible with other compounds applied on previous or for successive coats. <br />1. Prefilling: At open joints[, rounded or beveled panel edges,] and damaged surface areas, <br />use setting-type taping compound. <br />2. Embedding and First Coat: For embedding tape and first coat on joints, fasteners, and <br />trim flanges, use drying-type, all-purpose compound. <br />a. Use setting-type compound for installing paper-faced metal trim accessories. <br />3. Fill Coat: For second coat, use setting-type, sandable topping compound. <br />4. Finish Coat: For third coat, use setting-type, sandable topping compound. <br />5. Skim Coat: For final coat of Level 5 finish, use drying-type, all-purpose compound. <br />D. Joint Compound for Exterior Applications: <br />1. Exterior Gypsum Soffit Board: Use setting-type taping compound and setting-type, <br />sandable topping compound. <br />2. Glass-Mat Gypsum Sheathing Board: As recommended by sheathing board <br />manufacturer. <br />E. Joint Compound for Tile Backing Panels: <br />1. Water-Resistant Gypsum Backing Board: Use setting-type taping compound and setting- <br />type, sandable topping compound. <br />2. Glass-Mat, Water-Resistant Backing Panel: As recommended by backing panel <br />manufacturer. <br />3. Cementitious Backer Units: As recommended by backer unit manufacturer. <br />2.5 AUXILIARY MATERIALS <br />A. General: Provide auxiliary materials that comply with referenced installation standards and <br />manufacturer's written recommendations. <br />B. Laminating Adhesive: Adhesive or joint compound recommended for directly adhering <br />gypsum panels to continuous substrate. <br />1. Use adhesives that have a VOC content of 50 g/L or less when calculated according to <br />40 CFR 59, Subpart D (EPA Method 24). <br />C. Steel Drill Screws: ASTM C 1002, unless otherwise indicated. <br />1. Use screws complying with ASTM C 954 for fastening panels to steel members from <br />0.033 to 0.112 inch (0.84 to 2.84 mm) thick. <br />DocuSign Envelope ID: 775B89AF-3514-4D9E-B148-2FDE4EFF16C2