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� <br /> � <br /> C Adhesives: As recommended by Gypsum Boazd manufacturer, for adhesively applying <br /> �5W11 � <br /> board to concrete block and insulation,for laminating in multi=layer and single layer at fire <br /> . rated construction. <br /> D Beads and Trim: Exterior comer beads,Dur-A-Bead corner reinforcement;at all exterior � <br /> corners. Inside corners,to have Perf-A-Bead comer reinforcemen� Where gypsum board <br /> ter�ninates provide#400 series metal trim. <br /> E Tape System:Al1 exposed joints and trim to be finished by using USG Perf-A-Tape joint ;� <br /> system. <br /> F Sealant: Sheetrock brand W/R sealant, apply to all cut edges and screw heads of water- � <br /> resistant, <br /> water resistant fire rated and exterior soffit gypsum boazd. <br /> 1. Caulking:Provide caulking as recommended by manufactured to achieve wall STC � <br /> rating. <br /> 23 ADHESIVES � <br /> 1. Only adhesives which ace recoir►mended by the manufactured for use onthe specific <br /> substrate to � <br /> insure pernnanent bond. <br /> PART 3: EXECiJTION <br /> 3.1 INSTALLATION � <br /> A. Wallboard: � <br /> 1. General: Hold gypsum board in firm contact with supports when insta.11ing. No <br /> horizontal joints <br /> permitted,eliminate small pieces. Do not use broken or damaged sheets. � <br /> 2. Joints:install so all joints occur over a support.Neatly fit a11 abutting joints and to <br /> all obstructions, ' � <br /> Do not force joints overIy tigh� <br /> 3. Fastening,General:Fasten gypsum board with adhesive and drywall screws.Apply <br /> adhesive as ' <br /> recommended by manufacturer. Space screws not less than 3/S" from edges and <br /> ends of wallboard. Stagger screws on adjoining edges or ends. While screws are <br /> being driven, hold wallboard in fism contact underlying support. Attach from � <br /> central portion of wallboard toward ends and edges. Drive screws with an electric <br /> screw gun equipped with adjustable screw depth control and Phillips bit. Set heads <br /> of exposed screws to provide slight depression below surface of gypsum board. If <br /> screw size and screw spacing as specified differs wi#h manufacturer's � <br /> recommendations,verify with architect prior to application. <br /> 4. Meta1 corner bead:Securely instalI at all comers in single lengths where the length � <br /> of the corner <br /> does not exceed standard stock lengths. Apply at least two coats of corapound over <br /> beads,each coat feathered out onto panel face. <br /> GYPSUM DRYWALL Page 2 of 3 , <br /> � <br />