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HomeMy WebLinkAbout09250.pdf BICKFORD OF CARMEL, IN 12/12/2012 GYPSUM BOARD 09250 - 1 SECTION 09250 - GYPSUM BOARD PART 1 - GENERAL 1.1 RELATED DOCUMENTS A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section. 1.2 SUMMARY A. Section Includes: 1. Interior gypsum board. 2. Exterior gypsum board for ceilings and soffits. 3. Tile backing panels. B. Related Requirements: 1. Division 6 Section "Sheathing" for gypsum sheathing for exterior walls. 2. Division 9 Section "Non-Load-Bearing Steel Framing" for non-structural framing and suspension systems that support gypsum board panels. 3. Division 9 Section "Gypsum Board Shaft-Wall Assemblies" for metal shaft-wall framing, gypsum shaft liners, and other components of shaft-wall assemblies. 4. Division 9 Section "Ceramic Tile" for cementitious backer units installed as substrates for ceramic tile. 1.3 ACTION SUBMITTALS A. Product Data: For each type of product. 1.4 DELIVERY, STORAGE AND HANDLING A. Store materials inside under cover and keep them dry and protected against weather, condensation, direct sunlight, construction traffic, and other potential causes of damage. Stack panels flat and supported on risers on a flat platform to prevent sagging. 1.5 FIELD CONDITIONS A. Environmental Limitations: Comply with ASTM C 840 requirements or gypsum board manufacturer's written recommendations, whichever are more stringent. B. Do not install paper-faced gypsum panels until installation areas are enclosed and conditioned. C. Do not install panels that are wet, those that are moisture damaged, and those that are mold damaged. 1. Indications that panels are wet or moisture damaged include, but are not limited to, discoloration, sagging, or irregular shape. BICKFORD OF CARMEL, IN 12/12/2012 GYPSUM BOARD 09250 - 2 2. Indications that panels are mold damaged include, but are not limited to, fuzzy or splotchy surface contamination and discoloration. PART 2 - PRODUCTS 2.1 PERFORMANCE REQUIREMENTS A. Fire-Resistance-Rated Assemblies: For fire-resistance-rated assemblies, provide materials and construction identical to those tested in assembly indicated according to ASTM E 119 by an independent testing agency. B. Low Emitting Materials: For ceiling and wall assemblies, provide materials and construction identical to those tested in assembly and complying with the testing and product requirements of the California Department of Health Services' "Standard Practice for the Testing of Volatile Organic Emissions from Various Sources Using Small-Scale Environmental Chambers." 2.2 GYPSUM BOARD, GENERAL A. Size: Provide maximum lengths and widths available that will minimize joints in each area and that correspond with support system indicated. 2.3 INTERIOR GYPSUM BOARD A. Gypsum Wall Board, Type X: ASTM C 1396/C 1396M. 1. Thickness: 5/8 inch (15.9 mm). 2. Long Edges: Tapered. B. Gypsum Ceiling Board: ASTM C 1396/C 1396M. 1. Thickness: 5/8 inch (15.9 mm). 2. Long Edges: Tapered. 2.4 EXTERIOR GYPSUM BOARD FOR CEILINGS AND SOFFITS A. Glass-Mat Gypsum Sheathing Board: ASTM C 1177/C 1177M, with fiberglass mat laminated to both sides and with manufacturer's standard edges. 1. Core: 5/8 inch (15.9 mm), Type X. 2.5 TILE BACKING PANELS A. Glass-Mat, Water-Resistant Backing Board: ASTM C 1178/C 1178M, with manufacturer's standard edges. 1. Core: 5/8 inch (15.9 mm), Type X. 2. Mold Resistance: ASTM D 3273, score of 10. 2.6 TRIM ACCESSORIES BICKFORD OF CARMEL, IN 12/12/2012 GYPSUM BOARD 09250 - 3 A. Interior Trim: ASTM C 1047. 1. Material: Galvanized or aluminum-coated steel sheet, rolled zinc, plastic, or paper-faced galvanized steel sheet. 2. Shapes: a. Cornerbead. b. LC-Bead: J-shaped; exposed long flange receives joint compound. c. Expansion (control) joint. B. Exterior Trim: ASTM C 1047. 1. Material: Hot-dip galvanized steel sheet, plastic, or rolled zinc. 2. Shapes: a. Cornerbead. C. Aluminum Trim: Extruded accessories of profiles and dimensions indicated. 1. Aluminum: Alloy and temper with not less than the strength and durability properties of ASTM B 221 (ASTM B 221M), Alloy 6063-T5. 2. Finish: Corrosion-resistant primer compatible with joint compound and finish materials specified. 2.7 JOINT TREATMENT MATERIALS A. General: Comply with ASTM C 475/C 475M. B. Joint Tape: 1. Interior Gypsum Board: Paper. 2. Exterior Gypsum Soffit Board: Paper. 3. Glass-Mat Gypsum Sheathing Board: 10-by-10 glass mesh. 4. Tile Backing Panels: As recommended by panel manufacturer. C. Joint Compound for Interior Gypsum Board: For each coat use formulation that is compatible with other compounds applied on previous or for successive coats. 1. Prefilling: At open joints and damaged surface areas, use setting-type taping compound. 2. Embedding and First Coat: For embedding tape and first coat on joints, fasteners, and trim flanges, use setting-type taping compound. a. Use setting-type compound for installing paper-faced metal trim accessories. 3. Fill Coat: For second coat, use drying-type, all-purpose compound. 4. Finish Coat: For third coat, use drying-type, all-purpose compound. 5. Skim Coat: For final coat of Level 5 finish, use drying-type, all-purpose compound. D. Joint Compound for Exterior Applications: 1. Exterior Gypsum Soffit Board: Use setting-type taping compound and setting-type, sandable topping compound. 2. Glass-Mat Gypsum Sheathing Board: As recommended by sheathing board manufacturer. E. Joint Compound for Tile Backing Panels: BICKFORD OF CARMEL, IN 12/12/2012 GYPSUM BOARD 09250 - 4 1. Glass-Mat, Water-Resistant Backing Panel: As recommended by backing panel manufacturer. 2.8 AUXILIARY MATERIALS A. General: Provide auxiliary materials that comply with referenced installation standards and manufacturer's written recommendations. B. Steel Drill Screws: ASTM C 1002, unless otherwise indicated. 1. Use screws complying with ASTM C 954 for fastening panels to steel members from 0.033 to 0.112 inch (0.84 to 2.84 mm) thick. 2. For fastening cementitious backer units, use screws of type and size recommended by panel manufacturer. C. Sound Attenuation Blankets: ASTM C 665, Type I (blankets without membrane facing) produced by combining thermosetting resins with mineral fibers manufactured from glass, slag wool, or rock wool. 1. Fire-Resistance-Rated Assemblies: Comply with mineral-fiber requirements of assembly. D. Thermal Insulation: As specified in Division 7 Section "Building Insulation." E. Vapor Retarder: As specified in Division 7 Section "Building Insulation." PART 3 - EXECUTION 3.1 EXAMINATION A. Examine areas and substrates including welded hollow-metal frames and framing, with Installer present, for compliance with requirements and other conditions affecting performance. B. Examine panels before installation. Reject panels that are wet, moisture damaged, and mold damaged. C. Proceed with installation only after unsatisfactory conditions have been corrected. 3.2 APPLYING AND FINISHING PANELS, GENERAL A. Comply with ASTM C 840. B. Install ceiling panels across framing to minimize the number of abutting end joints and to avoid abutting end joints in central area of each ceiling. Stagger abutting end joints of adjacent panels not less than one framing member. C. Install panels with face side out. Butt panels together for a light contact at edges and ends with not more than 1/16 inch (1.5 mm) of open space between panels. Do not force into place. D. Locate edge and end joints over supports, except in ceiling applications where intermediate supports or gypsum board back-blocking is provided behind end joints. Do not place tapered edges against cut edges or ends. Stagger vertical joints on opposite sides of partitions. Do not make joints other than control joints at corners of framed openings. BICKFORD OF CARMEL, IN 12/12/2012 GYPSUM BOARD 09250 - 5 E. Form control and expansion joints with space between edges of adjoining gypsum panels. F. Cover both faces of support framing with gypsum panels in concealed spaces (above ceilings, etc.), except in chases braced internally. 1. Unless concealed application is indicated or required for sound, fire, air, or smoke ratings, coverage may be accomplished with scraps of not less than 8 sq. ft. (0.7 sq. m) in area. 2. Fit gypsum panels around ducts, pipes, and conduits. 3. Where partitions intersect structural members projecting below underside of floor/roof slabs and decks, cut gypsum panels to fit profile formed by structural members; allow 1/4- to 3/8-inch- (6.4- to 9.5-mm-) wide joints to install sealant. G. Isolate perimeter of gypsum board applied to non-load-bearing partitions at structural abutments, except floors. Provide 1/4- to 1/2-inch- (6.4- to 12.7-mm-) wide spaces at these locations and trim edges with edge trim where edges of panels are exposed. Seal joints between edges and abutting structural surfaces with acoustical sealant. H. Attachment to Steel Framing: Attach panels so leading edge or end of each panel is attached to open (unsupported) edges of stud flanges first. I. Wood Framing: Install gypsum panels over wood framing, with floating internal corner construction. Do not attach gypsum panels across the flat grain of wide-dimension lumber, including floor joists and headers. Float gypsum panels over these members or provide control joints to counteract wood shrinkage. J. Install sound attenuation blankets before installing gypsum panels unless blankets are readily installed after panels have been installed on one side. 3.3 APPLYING INTERIOR GYPSUM BOARD A. Install interior gypsum board in the following locations: 1. Wallboard Type: As indicated on Drawings. 2. Type X: As indicated on Drawings and/or where required for fire-resistance-rated assembly. 3. Ceiling Type: As indicated on Drawings. 4. Type C: As indicated on Drawings and/or where required for specific fire-resistance- rated assembly indicated. 5. Glass-Mat Interior Type: As indicated on Drawings. B. Single-Layer Application: 1. On ceilings, apply gypsum panels before wall/partition board application to greatest extent possible and at right angles to framing unless otherwise indicated. 2. On partitions/walls, apply gypsum panels vertically (parallel to framing) unless otherwise indicated or required by fire-resistance-rated assembly, and minimize end joints. a. Stagger abutting end joints not less than one framing member in alternate courses of panels. b. At stairwells and other high walls, install panels horizontally unless otherwise indicated or required by fire-resistance-rated assembly. 3. On Z-furring members, apply gypsum panels vertically (parallel to framing) with no end joints. Locate edge joints over furring members. 4. Fastening Methods: Apply gypsum panels to supports with steel drill screws. BICKFORD OF CARMEL, IN 12/12/2012 GYPSUM BOARD 09250 - 6 C. Multilayer Application: 1. On ceilings, apply gypsum board indicated for base layers before applying base layers on walls/partitions; apply face layers in same sequence. Apply base layers at right angles to framing members and offset face-layer joints one framing member, 16 inches (400 mm) minimum, from parallel base-layer joints, unless otherwise indicated or required by fire- resistance-rated assembly. 2. On partitions/walls, apply gypsum board indicated for base layers and face layers vertically (parallel to framing) with joints of base layers located over stud or furring member and face-layer joints offset at least one stud or furring member with base-layer joints, unless otherwise indicated or required by fire-resistance-rated assembly. Stagger joints on opposite sides of partitions. 3. On Z-furring members, apply base layer vertically (parallel to framing) and face layer either vertically (parallel to framing) or horizontally (perpendicular to framing) with vertical joints offset at least one furring member. Locate edge joints of base layer over furring members. 4. Fastening Methods: Fasten base layers and face layers separately to supports with screws. 3.4 APPLYING EXTERIOR GYPSUM PANELS FOR CEILINGS AND SOFFITS A. Apply panels perpendicular to supports, with end joints staggered and located over supports. 1. Install with 1/4-inch (6.4-mm) open space where panels abut other construction or structural penetrations. 2. Fasten with corrosion-resistant screws. 3.5 APPLYING TILE BACKING PANELS A. Glass-Mat, Water-Resistant Backing Panels: Comply with manufacturer's written installation instructions and install at showers, tubs, and where indicated and locations indicated to receive tile. Install with 1/4-inch (6.4-mm) gap where panels abut other construction or penetrations. B. Where tile backing panels abut other types of panels in same plane, shim surfaces to produce a uniform plane across panel surfaces. 3.6 INSTALLING TRIM ACCESSORIES A. General: For trim with back flanges intended for fasteners, attach to framing with same fasteners used for panels. Otherwise, attach trim according to manufacturer's written instructions. B. Interior Trim: Install in the following locations: 1. Cornerbead: Use at outside corners. 2. LC-Bead: Use at exposed panel edges. C. Exterior Trim: Install in the following locations: 1. Cornerbead: Use at outside corners. D. Aluminum Trim: Install in locations indicated on Drawings. BICKFORD OF CARMEL, IN 12/12/2012 GYPSUM BOARD 09250 - 7 3.7 FINISHING GYPSUM BOARD A. General: Treat gypsum board joints, interior angles, edge trim, control joints, penetrations, fastener heads, surface defects, and elsewhere as required to prepare gypsum board surfaces for decoration. Promptly remove residual joint compound from adjacent surfaces. B. Prefill open joints and damaged surface areas. C. Apply joint tape over gypsum board joints, except for trim products specifically indicated as not intended to receive tape. D. Gypsum Board Finish Levels: Finish panels to levels indicated below and according to ASTM C 840: 1. Level 1: Ceiling plenum areas, concealed areas, and where indicated. 2. Level 2: Panels that are substrate for tile. 3. Level 4: At panel surfaces that will be exposed to view unless otherwise indicated. a. Primer and its application to surfaces are specified in other Division 9 Sections. E. Glass-Mat Gypsum Sheathing Board: Finish according to manufacturer's written instructions for use as exposed soffit board. F. Glass-Mat Faced Panels: Finish according to manufacturer's written instructions. 3.8 PROTECTION A. Protect adjacent surfaces from drywall compound and promptly remove from floors and other non-drywall surfaces. Repair surfaces stained, marred, or otherwise damaged during drywall application. B. Protect installed products from damage from weather, condensation, direct sunlight, construction, and other causes during remainder of the construction period. C. Remove and replace panels that are wet, moisture damaged, and mold damaged. 1. Indications that panels are wet or moisture damaged include, but are not limited to, discoloration, sagging, or irregular shape. 2. Indications that panels are mold damaged include, but are not limited to, fuzzy or splotchy surface contamination and discoloration. END OF SECTION 09250