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DocuSign Envelope ID: B94F2D40-3B3C-47A7-86C2-6F1 B4F92C62C <br /> SECTION 07 21 19—FOAM-IN-PLACE INSULATION <br /> j. Closed Cell Content(ASTM D2856) : Greater than 90%. <br /> 4. Equipment used to apply the foam insulation shall have fixed ratio positive displacement pumps and approved <br /> by foam manufacturer. <br /> 5. Fire Propagation Characteristics: Passes NFPA 285 testing as part of an approved assembly. <br /> 6. Report tested and approved substrates and exterior covering materials per NFPA 285 testing. <br /> 7. Potential Heat value per NFPA 259. <br /> 2.3 MISCELLANEOUS MATERIALS <br /> A. Retain "Primer" Paragraph below if priming is required. <br /> B. Primer: Material recommended by insulation manufacturer where required for adhesion of insulation to substrates. <br /> C. Liquid joint sealant applied at 50 wet mils (+/- 5)thickness around window openings at all head,jambs and sills. <br /> Turn liquid joint sealant up the inside face of the block by one full block. Install BEFORE Foam In Place Insulation. <br /> D. Miscellaneous: Materials recommended by insulation manufacturer where required for insulation repairs, fire <br /> proofing, and flashing membrane as a transition material. <br /> PART 3 - EXECUTION <br /> 3.1 EXAMINATION <br /> A. Do not begin installation until substrates have been properly prepared. <br /> B. If substrate preparation is the responsibility of another installer,notify Architect of unsatisfactory preparation before <br /> proceeding. <br /> C. Commencement of work outlined in this section shall be deemed as acceptance of existing work and conditions. <br /> 3.2 PREPARATION <br /> A. Verify that substrates are clean, dry, and free of substances that are harmful to insulation. <br /> B. Apply only when surfaces and environmental conditions are within limits prescribed by the material manufacturer. <br /> C. Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the <br /> substrate under the project conditions <br /> D. Establish a Safety Zone to ensure unauthorized workers are not in the application area during the spray foam <br /> application. Cordon off area for spray foam application and post warning signs as necessary to prevent entry to <br /> the area by other persons not wearing appropriate Personal Protective Equipment(PPE). <br /> E. For applications to CMU,concrete or masonry base walls,use transition membranes to seal junctions of dissimilar <br /> materials,such as window framing. Do not apply transition membranes at wall corners or changes of plane where <br /> the masonry/concrete construction is continuous. Backer material covered with transition membrane can be used <br /> to bridge between two masonry/concrete walls constructed independent of each other. <br /> F. Mask off or move materials or equipment in the vicinity of the spray foam application to prevent accidental <br /> overspray. <br /> 3.3 INSTALLATION <br /> A. Comply with insulation manufacturer's written instructions applicable to products and applications. Ensure <br /> compliance with weather conditions, substrate temperature, chemical temperature, equipment settings, substrate <br /> condition, and personal protective equipment(PPE)requirements. <br /> B. Install liquid applied flashing joint sealant at end and edge joints with sufficient hand pressure to ensure seal and <br /> in accordance with manufacturer's recommendations. <br /> 3.4 PROTECTION <br /> A. Protect installed insulation from damage due to harmful weather exposures, physical abuse, and other causes. <br /> B. Touch-up, repair or replace damaged products prior to Substantial Completion. <br /> END OF SECTION 07 21 19 <br /> ©BOOMERANG DESIGN 0721 19-3 510 Meadowlands Drive,Hillsborough,NC <br /> BD#1835 ORANGE COUNTY,NC 12/07/2018 <br />