Spray foam will cost more to install than conventional fiberglass and blown cellulose insulation but will save the homeowner money every day for the life of the house. Being energy efficient requires an initial investment but the paybacks are substantial and verifiable. Polyurethane spray foam insulated houses can realistically expect to save the homeowner 30% TO 50% energy savings over conventionally insulated homes, with the average payback for the additional cost of the foam reimbursed by energy cost savings in 2 to 4 years.
Polyurethane spray foam does not matte down or age like conventional insulations do, so the energy cost savings will be the same savings 2 decades from today as they are today. The savings become an added property value should the homeowner ever sell the property.