All About DIY Spray Foam Insulation Kits ~ Closed-cell polyurethane spray foam has some pretty awesome qualities. It has a high R-value. It’s resistant to water, mold and insects. It expands into hard-to-reach nooks and crannies. Heck, it can even add structural support to walls and roofs.
Installing insulation is one of the most environmentally friendly things a homeowner can do. About 65 percent of U.S. houses are poorly insulated, a 2005 Harvard study estimates. The Best Insulation Types for Your Home | Tiny Homes