Foam

I have two options: buying close cell, fire resistant, R-7 per inch, 3 lb density foam for $12 per cubic ft. OR buying open cell, fire resistant, R-3.7 per inch, 0.75 density foam for $6.80 per cubic ft.

SO, I would like your educated opinion on what should I buy. Thank you.

P.S. I’m using foam with combination with fiberglass, just what to seal all small gaps to air proof. I do understand difference between open and closed cell/

If you want to "seal all small gaps to air proof" then closed-cell is the only option. Open-cell foam is still permeable, so it will not seal as well as closed-cell.

Posted closed cell foam |