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Gateway Park Center PERKINS+WILL <br /> 810495.000 <br /> 12/06/18 <br /> <br /> <br />THERMAL INSULATION <br /> 07 21 00 - 2 <br /> <br /> <br />2.2 ACCESSORIES <br />A. Insulation for Miscellaneous Voids: <br />1. Glass-Fiber Insulation: ASTM C 764, Type II, loose fill; with maximum flame- <br />spread and smoke-developed indexes of 5, per ASTM E 84. <br />PART 3 - EXECUTION <br />3.1 PREPARATION <br />A. Clean substrates of substances that are harmful to insulation, including removing <br />projections capable of puncturing insulation or vapor retarders, or that interfere <br />with insulation attachment. <br />3.2 INSTALLATION, GENERAL <br />A. Comply with insulation manufacturer's written instructions applicable to products <br />and applications. <br />B. Install insulation that is undamaged, dry, and unsoiled and that has not been left <br />exposed to ice, rain, or snow at any time. <br />C. Extend insulation to envelop entire area to be insulated. Fit tightly around <br />obstructions and fill voids with insulation. Remove projections that interfere with <br />placement. <br />D. Provide sizes to fit applications and selected from manufacturer's standard <br />thicknesses, widths, and lengths. Apply single layer of insulation units unless <br />multiple layers are otherwise shown or required to make up total thickness or to <br />achieve R-value. <br />3.3 INSTALLATION OF INSULATION IN FRAMED CONSTRUCTION <br />A. Blanket Insulation: Install in cavities formed by framing members according to the <br />following requirements: <br />1. Use insulation widths and lengths that fill the cavities formed by framing <br />members. If more than one length is required to fill the cavities, provide <br />lengths that will produce a snug fit between ends. <br />2. Place insulation in cavities formed by framing members to produce a friction <br />fit between edges of insulation and adjoining framing members. <br />3. Maintain 3-inch clearance of insulation around recessed lighting fixtures not <br />rated for or protected from contact with insulation. <br />4. For metal-framed wall cavities where cavity heights exceed 96 inches, <br />support unfaced blankets mechanically and support faced blankets by taping <br />flanges of insulation to flanges of metal studs.