Spray foam insulation is the perfect solution for cold floors in cantilevered overhangs, floors above garages, and floors over unheated or unconditioned spaces. By using spray polyurethane foam, you prevent any air movement that you would normally have in a fiberglass insulated floor.
Our clients report back that there is a night and day difference in floor temperatures after using spray foam insulation in these areas.
Fiberglass insulation is a very poor choice in these areas as air can flow through fiberglass eliminating most of its R-value. Spray foam insulation completely fills these spaces and seals off those overhangs and prevents cold floors in winter.
The most effective way to warm up your floors would be to use an insulation that both seals and insulates the underside of your subflooring. Spray foam or the installation