Watch Modern Marvels show the amazing insulating power of Urethane Spray Foam

Benefits

Spray foam insulation saves on energy costs and lowers utility bills. Studies by the US Department of Energy show that 40% of a home’s energy is lost as the result of air infiltration through walls, windows and doorways. Buildings treated with spray foam insulation typically insulate as much as 50% better than traditional insulation products.

Insulation that is sprayed in buildings protects against moisture, which provides the benefit of reducing the chance of harmful mold and mildew.

Eliminating mold growth reduces the likelihood of rotting wood in a home, and allergic reactions to mold spores.

What Wikipedia say's

In addition to building temperature and moisture control, spray foam insulation is often used to reduce noise.Foam insulation serves as a barrier to airborne sounds, and reduces airborne sound transfer through a building’s roof, floor and walls.

In the United States, homes treated with spray foam insulation often qualify for state and federal tax deductions.

Guide to Home Insulation

Download this detailed PDF. from Energy.Gov