Foam insulation is sprayed in place into walls, ceilings, and foundation areas, where it expands and cures, providing high R-values (3.6 to 6.5 per inch) while generally being effective at blocking air leakage. Application of these products requires special equipment and is usually done by licensed contractors.
Spray polyurethane foam (SPF) accounts for the vast majority of foam-in-place insulation, while a less common inorganic foamed-cement insulation offers some attractive features for health-conscious building occupants.
Products in Spray Foam Insulation
Spray Polyurethane Foam Alliance