Spray foam insulation is a polyurethane foam sprayed into walls, attics, underneath housing, metal buildings, chicken houses, and anywhere else you need insulation. It works extremely well to keep heat in during cold temperatures and cold in during hot temperatures. Spray foam insulation has extreme benefits such as getting into all tiny nooks and crannies which fiberglass is unable to do. This provides better coverage and longer-lasting protection. Spray foam insulation also prevents drafts because it seals every crack and crevice.