Are ‘Hot Roofs’ allowed in Minnesota?
- Also, on old one-and-one-half story homes with no soffits or very short soffits, adding proper soffit ventilation can be difficult or impossible. 8 per inch, while fiberglass batt insulation is about half that, and it’s nearly impossible to install properly. Foam insulation makes for a perfect seal – no gaps, no air leakage, no attic bypasses. Sprayed Polyurethane foam insulation has an R-Value of 6. . What are the benefits? Closed-cell spray foam has a higher insulating value (R-Value) than anything else. If ductwork is located in the attic space it won’t need to be insulated, eliminating a lot of energy loss
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