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Orange County Health Department Improvements Smith Sinnett / 2024008 <br />Hillsborough, NC Orange County Asset Management Services <br />GYPSUM BOARD 09 29 00 - 8 <br />3.6 APPLYING INTERIOR GYPSUM BOARD <br />A. Install interior gypsum board in the following locations: <br />1. Regular Type: As indicated on Drawings. <br />2. Type X: Install in Shower Rooms. <br />3. Type C: Where required for specific fire-resistance-rated assembly indicated. <br />B. Single-Layer Application: <br />1. On ceilings, apply gypsum panels before wall/partition board application to greatest extent <br />possible and at right angles to framing, unless otherwise indicated. <br />2. On partitions/walls, apply gypsum panels vertically (parallel to framing), unless otherwise <br />indicated or required by fire-resistance-rated assembly, and minimize end joints. <br />a. Stagger abutting end joints not less than one framing member in alternate courses of <br />panels. <br />3. On Z-furring members, apply gypsum panels vertically (parallel to framing) with no end joints. <br />Locate edge joints over furring members. <br />4. Fastening Methods: Apply gypsum panels to supports with steel drill screws. <br />3.7 APPLYING CEMENTITIOUS BACKER PANELS <br />A. Cementitious Backer Units: ANSI A108.11, at locations indicated. <br />3.8 INSTALLING TRIM ACCESSORIES <br />A. General: For trim with back flanges intended for fasteners, attach to framing with same fasteners used for <br />panels. Otherwise, attach trim according to manufacturer’s written instructions. <br />B. Exterior Trim: Install in the following locations: <br />1. Cornerbead: Use at outside corners. <br />3.9 FINISHING GYPSUM BOARD <br />A. General: Treat gypsum board joints, interior angles, edge trim, control joints, penetrations, fastener <br />heads, surface defects, and elsewhere as required to prepare gypsum board surfaces for decoration. <br />Promptly remove residual joint compound from adjacent surfaces. <br />B. Prefill open joints, rounded or beveled edges, and damaged surface areas. <br />C. Apply joint tape over gypsum board joints, except those with trim having flanges not intended for tape. <br />D. Gypsum Board Finish Levels: Finish panels to levels indicated below and according to ASTM C 840: <br />1. Level 1: Ceiling plenum areas, concealed areas, and where indicated. <br />2. Level 5: Gypsum board surfaces, unless otherwise indicated <br />a. Primer and its application to surfaces are specified in other Division 09 Sections. <br />3. Level 5: Provide at all Projection and Magnetic Wall Paint Areas. <br />E. Glass-Mat Gypsum Sheathing Board: Finish according to manufacturer’s written instructions for use as <br />exposed soffit board. <br />F. Cementitious Backer Units: Finish according to manufacturer’s written instructions. <br />G. Use the following joint compound combination as applicable to the finish levels specified: <br />1. Embedding and First Coat: Ready-mixed, drying-type, all-purpose or taping compound. Fill <br />(Second) Coat: Ready-mixed, drying-type, all-purpose or topping compound. Finish (Third) <br />Coat: Ready-mixed, drying-type, all-purpose or topping compound. <br />H. For Level 4 gypsum board finish, embed tape in joint compound and apply first, fill (second), and finish <br />(third) coats of joint compound over joints, angles, fastener heads, and accessories. Touch up and sand <br />between coats and after last coat as needed to produce a surface free of visual defects and ready for <br />decoration. Install Level 5 finish in Corridors. <br />1. Where Level 1 gypsum board finish is indicated, embed tape in joint compound. <br />Docusign Envelope ID: 2D852F9B-A7CF-462A-9536-444A53AA848A