Closed Cell Spray Foam We offer a 2 pound density closed cell foam. R-Value = 6.4 per inch of thickness. Ideal for carports, crawl spaces, attics, metal buildings, freezers, sub-flooring, new construction, additions, etc. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)