Attic Closed Cell Foam Insulation
Polyurethane foam spf insulation and we are frequently asked to march 2007 i jlc i 1 insulating unvented attics with spray foam closed cell polyurethane foam provides the insulation air barrier and vapor retarder necessary for an unvented attic assembly closed cell polyurethane foam provides the insulation air barrier.
Attic closed cell foam insulation. Open cell foam weighs 1 2 pound per cubic foot and closed cell weighs 2 lbs per cubic foot. This type of spray foam offers the specific benefits of continuous insulation interior wall cavity fill and unvented attic applications. Closed cell foam can also increase the racking. Insulating value and strength open cell foam has an r value of about 3 5 to 3 7 per inch while closed cell foam has an r value of about 6 per inch.
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