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THE CITY OF SUNNY ISLES BEACH <br />PROJECT NO. 21-1011 <br />BUILDING DEPARTMENT RELOCATION TO ANNEX <br /> <br />Project No. 21-1011 November 2024 072700 Thermal and Air Barrier Wall <br />System-7 <br />cellular plastic foam, complying with the following methods and meeting the <br />following physical properties: <br /> <br />1. Core Density, ASTM D1622: Minimum 2pcf <br /> <br />2. Thermal Resistance, ASTM C518: 140degreeF/90day Aged R-Value, measured at <br />75F mean Temp: Minimum R6.1/inch. <br /> <br />3. Flame Spread, ASTM E84, Class A: 25 or less. <br /> <br />4. Smoke Developed, ASTM E84, Class A): 450 or less. <br /> <br />5. Compressive Strength minimum, ASTM D1621, 10 percent parallel to rise: 20 psi. <br /> <br />6. Closed Cell Content, ASTM D2856: minimum 90 percent. <br /> <br />7. Water Absorption by Volume maximum, ASTM D2842: 5.0 percent. <br /> <br />8. Water Vapor Permeability maximum, ASTM E96: 3.0 perm-inches. <br /> <br />B. Acceptable Products: The Dow Chemical Co. “Styrofoam” Spray Polyurethane Foam CM <br />Series. <br /> <br />1. Comply with specific type recommended by manufacturer dependent upon <br />surface temperature of substrate. <br /> <br />C. Provide manufacture's recommended water based thermal barrier coating over areas <br />of spray foam insulation. <br /> <br />1. Foam plastic shall be separated from the interior of a building by an approved <br />thermal barrier of 1/2-inch gypsum wallboard or equivalent thermal barrier <br />material that will limit the average temperature rise of the unexposed surface to <br />not more than 250ºF after 15 minutes of fire exposure, complying with the <br />standard time-temperature curve of ASTM E 119 or UL 263. The thermal barrier <br />shall be installed in such a manner that it will remain in place for 15 minutes based <br />on FM 4880, UL 1040, NFPA 286 or UL 1715. <br /> <br />2. Flame Seal-TB Coating or equivalent acceptable to manufacturer and complying <br />with thermal barrier/ignition barrier requirements of the Pennsylvania Uniform <br />Construction Code. <br /> <br />PART 3 - EXECUTION <br /> <br />3.1 EXAMINATION <br /> <br />A. Examine substrates and installation conditions for compliance with requirements for installation <br />conditions affecting performance of the work. <br /> <br />1. Verify that metal wall studs, opening framing, bridging, bracing and other framing <br />support members and anchorage have been installed within thermal wall system <br />alignment tolerances and requirements. <br /> <br />2. Verify that substrate surfaces to receive spray polyurethane foam are free of frost,