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Gary H 1978 911 SC
Join Date: Oct 2003
Location: Fort Worth Texas
Posts: 1,306
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I own a business that does spray foam insulation and I have doubts about R.B. That said most shingles are manufactured wall above 450 F and a high temperature in an attic is 185F. Either with either foam or R.B. the temperature increase is 8-12 F according to GAF and ELK shingles manufactures. My doubts are with the spray on R.B. The solar shield on the back of the roof decking lowers the temperature around 35F on a sunny day.
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Gary H 1978 911 SC
Last edited by gshase; 10-15-2013 at 05:20 PM..
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