Ducts in the Crawl Space – Insulate With Fiber or Foam?
There is so much to be said for these competing products in many applications. Spray polyurethane foam of both primary types, open-cell foam, and closed-cell foam, is still compared to fiberglass and vice versa in so many applications. Differences in performance, R-value, moisture qualities, pricing, effects on the environment, blah blah, etc., have always been …