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How much R-value does a SPF spray polyurethane foam roofs and/or wall system offer?

April 26, 2017foam Offer polyurethane R-Value roofs SPF spray system wall

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How much R-value does a SPF spray polyurethane foam roofs and/or wall system offer?

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They offer the highest R-value per inch of any insulation. 3-lbs density roofing foams have an R-value of 6.7 per inch and 2-lbs wall foams have an R-value of 6.2 per inch.