1) One of the most energy-efficient things a homeowner can install is spray foam insulation.

2) The most prevalent form of spray foam insulation is polyurethane. Polyurethane foam is sprayed as a liquid straight into wall and floor cavities, where it soon hardens into thick, dense insulation.

3) Buildings insulated using spray foam insulate up to 50% better than those insulated with standard insulation materials like fiberglass.

4)Spray foam insulation may also operate as a sound barrier for an airborne sound that travels through the roofs, floors, and walls of a structure.