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A. Protect below-grade insulation on vertical surfaces(from damage during back-filling)by <br /> application of protection board. Set in adhesive in accordance with recommendations of manufacturer of <br /> insulation. <br /> 1. Supplement adhesive attachment of insulation by securing boards with two-piece wall <br /> ties designed for this purpose and specified under Division 4 "Unit Masonry." <br /> B. On units of cellular glass insulation,apply insulation with closely fitting joints using <br /> method indicated below: <br /> 1. Gob Method: Insta.11 four gobs of adhesive per unit and apply firmly against inside <br /> wythe of masonry or other construction as shown. Apply gobs at each corner; spread <br /> gobs to form pads 4 inches in diameter by 1/4 inch thick. <br /> 3.5 INSTALLATION OF GENERAL BUII.DING INSULATION <br /> A. Apply insulation units to substrate by method indicated,complying with manufacturer's <br /> recommendations. If no specific method is indicated,bond units to substrate with adhesive or use <br /> mechanical anchorage to provide permanent placement and support of units.Overlap the layers of rigid <br /> insulation boazd on roof deck <br /> B. Seal joints between closed-cell(nonbreathing)insulation units by applying adhesive, <br /> mastic,or sealant to edges of each unit to form a tight seal as units are shoved into place. Fill voids in <br /> completed installation with adhesive,mastic,or sealant as recommended by insulation manufacturer. <br /> C. Set vapor retarder faced units with vapor retarder to warm side of construction,except as <br /> otherwise indicated. <br /> D. Set reflective,foil-faced units accurately with not less than 0.75-inch air space in front of <br /> foil as indicated. <br /> E. Stuff glass fiber loose fill insulation into miscellaneous voids and cavity spaces where <br /> r shown. Compact to approximately 40 percent of normal maximum volume(to a density of <br /> approaumately 2.5 pc�. <br /> 3.6 INSTALLATION OF VAPOR RETARDERS <br /> A. Gen$ral: Extend vapor retarder to extremities of areas to be protected&om vapor <br /> transmission. Secure in place with adhesives or other anchorage system as indicated. Extend vapor <br /> retarder to cover miscellaneous voids in insulated substrates. <br /> B. Seal vertical joints in vapor retarders over framing by lapping not less than 2 wall studs. <br /> Fasten vapor retarders to framing at top,end,and bottom edges,at perimeter of wall openings,and at lap <br /> joints; space fasteners 16 inches o.c. <br /> C. Seal overlapping joints in vapor retarders with adhesives or tape per vapor retarder <br /> manufacturer's printed directions. Seal butt joints and fastener penetrations with tap�of type <br /> recommended by vapor retarder manufacturer. Locate all joints over framing members or other solid <br /> substrates. <br /> D. Firmly attach vapor retarders to substrates with mechanical fasteners or adhesives as <br /> recommended by vapor retarder manufacturer. <br /> - E. Seal joints caused by pipes,conduits,electrical boxes,and similar items penetrating <br /> vapor retarders with tape of type recommended by vapor retarder manufacturer to create an airtight seal <br /> between penetrating objects and vapor retarder. <br /> F. Repair any tears or punctures in vapor retarders immediately before concealment by other <br /> work. Cover with tape or another layer of vapor retarder. <br /> 3.7 PROTECTION <br /> Page 5 of 6 <br />