Spray foam can increase the energy efficiency of your home by 30-40% because of its air sealing properties. No other insulation can do this as effectively as spray foam can. The Department of Energy states that 40% of the losses in an average residential home is attributable to air infiltration and poor air sealing. Spray foam eliminates moisture and condensation problems and inhibits mold growth as well as improves indoor air quality.
The bottom line is a one-time insulation investment will save you every month on your utility bills.