Heating and cooling account for 50 to 70 percent of the energy consumed in an average home. Inadequate insulation and air leakage are leading causes of this energy waste. Even homes with fiberglass insulation may have gaps around window frames, pipes, vents and other areas that permit air leakage. Foam actually outperforms fiberglass insulation; it air-seals the home, conserving energy and boosting the efficiency of air conditioners. The result is lowered heating/cooling bills.