Finishing off a basement Step 1 ?
Paul Franklin wrote:
2 inches of foam has higher r value than 6 inches of fiberglass.
2 inches of polyisocyanurate has approximately the same R-value as 3.5"
of fiberglass. Most people would use the cheaper blue or pink foam
board, which would require 4" of foam to equal the 6" of fiberglass.
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