R-Value of Spray Foam vs Fiberglass: Which Insulation Performs Better?
R-Value of Spray Foam vs Fiberglass: Which Insulation Performs Better? The R-value of spray foam vs fiberglass is often the first comparison homeowners make when choosing insulation, and for good reason. If you’re looking strictly at insulation performance, closed-cell spray foam offers a higher R-value per inch than fiberglass while also sealing air leaks. Fiberglass remains a dependable and more