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DocuSign Envelope ID:D561B1AE-DF34-4907-AD06-AOEB37BBE427 <br /> CHAPEL HILL ORANGE COUNTY VISITORS BUREAU August 12,2020 <br /> 308 WEST FRANKLIN,CHAPEL HILL,NC <br /> 2. For fastening cementitious backer units, use screws of type and size recommended by <br /> panel manufacturer. <br /> D. Sound Attenuation Blankets: ASTM C 665, Type I (blankets without membrane facing) <br /> produced by combining thermosetting resins with mineral fibers manufactured from glass, slag <br /> wool, or rock wool. <br /> 1. Fire-Resistance-Rated Assemblies: Comply with mineral-fiber requirements of <br /> assembly. <br /> 2. Recycled Content: Provide blankets with recycled content such that postconsumer <br /> recycled content plus one-half of preconsumer recycled content constitutes a minimum <br /> percent by weight for MR 4.1 and MR 4.2 compliance.. <br /> E. Acoustical Sealant: As specified in Division 07 Section"Joint Sealants." <br /> 1. Provide sealants that have a VOC content of 250 g/L or less when calculated according to <br /> 40 CFR 59, Subpart D(EPA Method 24). <br /> F. Thermal Insulation: As specified in Division 07 Section"Thermal Insulation." <br /> G. Vapor Retarder: As specified in Division 07 Section"Thermal Insulation." <br /> PART 3 -EXECUTION <br /> 3.1 EXAMINATION <br /> A. Examine areas and substrates, with Installer present, and including welded hollow-metal frames <br /> and framing, for compliance with requirements and other conditions affecting performance. <br /> B. Examine panels before installation. Reject panels that are wet, moisture damaged, and mold <br /> damaged. <br /> C. Proceed with installation only after unsatisfactory conditions have been corrected. <br /> 3.2 APPLYING AND FINISHING PANELS, GENERAL <br /> A. Comply with ASTM C 840. <br /> B. Install ceiling panels across framing to minimize the number of abutting end joints and to avoid <br /> abutting end joints in central area of each ceiling. Stagger abutting end joints of adjacent panels <br /> not less than one framing member. <br /> C. Install panels with face side out. Butt panels together for a light contact at edges and ends with <br /> not more than 1/16 inch(1.5 mm)of open space between panels. Do not force into place. <br /> D. Locate edge and end joints over supports, except in ceiling applications where intermediate <br /> supports or gypsum board back-blocking is provided behind end joints. Do not place tapered <br /> edges against cut edges or ends. Stagger vertical joints on opposite sides of partitions. Do not <br /> make joints other than control joints at corners of framed openings. <br /> GYPSUM BOARD 092900 - 5 <br />