Open Cell - Typically used in attic spaces
Closed Cell - Used in areas with the most potential moisture (basements, crawl spaces, etc.)
(Typically used by Builders and Contractors)
Traditional fiberglass insulation slows air transfer but fails to seal small holes in a home or office building. Foam does both! Foam insulation actually seals the structure which greatly slows the rate of heat exchange between the inside and outside of the home.