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What Is Spray Foam Insulation's

Return-on-Investment (ROI)?


Spray foam insulation has the highest return-on-investment (ROI) of almost every other upgrade done to a building. In many cases, people who install spray foam in their homes can expect to see an average ROI between 3 to 5 years depending on the size of the building, where the home is located, the condition of the HVAC unit, home energy usage and the areas being spray foamed. 


When using spray foam, the absolute highest ROI per dollar spent comes when insulating our attic roof rafters. Up to 35% of heat loss in cold climates and up to 40% of radiant heat gain in warm climates comes from poorly insulated attic areas of most homes and buildings. By using spray foam, you prevent the unconditioned air from entering your home and the conditioned air from leaving your home. Spray foam insulation is your first, and only, line of defense against the elements!

Applying spray foam in your attic roof rafters will also significantly decrease the humidity in your attic, which will help the HVAC system become much more efficient. Unlike fiberglass and cellulose, spray foam is the only insulation that is a complete air barrier. Spray foam insulation is effective at keeping the hot, humid outdoor air from entering your building in the summer months while keeping the cool, conditioned air inside your building.

By spraying foam insulation in the roof, you raise the thermal envelope from the attic floor to the underside of the roof deck allowing the attic to become semi-conditioned space. Because of spray foam's incredible efficiency, your attic will now be within 5-10 degrees of the rest of the home throughout the year. This helps make the building more comfortable, reduces wear-and-tear on HVAC equipment and can reduce energy bills by as much as 50% or more. Instead of an attic getting to 100+ degrees Fahrenheit on hot summer days and below freezing on frigid winter nights, the attic will now be close to your home's set temperature of 65-85 degrees year-round which significantly reduces the risk of condensation on HVAC vents and wear and tear on the unit as well. 


Below is an example of a potential savings example

Average new home size in the US is 2355 sq ft.

Traditional fiberglass insulation install cost $5000

Spray foam insulation install cost $10,000

$5000 net cost difference

Estimated Annual Utilities for Heating and Cooling for the average US home $2,060 according to

Average Monthly Heating and Cooling Bill With Standard Insulation is $172 per month.

If spray foam is substituted in place of traditional insulation average Monthly Heating and Cooling Bill of $86 per month @ 50% savings.

monthly savings of $86 per month

Yearly savings $1032

5 years to break even ROI when using spray foam, assuming HVAC sizes are the same.

Typical HVAC tonnage reduction of 40% is common practice with spray foam insulation. Reduced HVAC unit size and associated costs would put the additional cost of spray foam to have an ROI of between 3 to 4 years when all costs are taken into account.

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