Spray foam insulation comes in two varieties: open cell and closed cell. Interior uses for open-cell foam insulation include wall cavities, the underside of roof decks, attics, basement walls, and crawl spaces. Low-density foam insulation's open cell structure allows for moisture permeability, which aids in moisture control. The closed cell form adds strength to your walls and raises the value of your house. Visit here - gorillabuilding.com For more information