How does Closed Cell compare with Open Cell formulas like Icynene?
Closed cell foam is much more effective. Closed cell spray foam has approximately double the R-value of open celled foams, plus it resists water and seals out air in just 1 inch. Just sealing out air leaks alone can lead to a dramatic savings in energy costs according to the U.S. Department of Energy. Open cell foams hold water which can quickly lead to mold problems.
