WebFeb 18, 2024 · Installing fiberglass will increase the STC rating to 39, but so will open-cell spray foam. So, you could say that both fiberglass and open-cell, not closed-cell, perform exactly the same in terms of soundproofing. Rockwool, on the other hand, performs exceptionally well increasing the STC rating to 45, which is a huge difference. WebWhen it comes to expanding foams, there are two main types: open cell foam, and closed cell foam. Open cell foam can hold a great deal of water, but as a result is neither waterproof nor water resistant. Most open cell spray foam will still dry after it gets wet, though, and due to the fact that it is inedible to mold you’ll never have to ...
FAQ: Is great stuff open cell or closed cell? - De Kooktips
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DuPont™ Spray Foam - Everything You Need to Know
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