Attic Insulation ROI Calculator

Oklahoma falls in DOE climate zone 3, where the recommended attic insulation range is R-38 to R-60. Homes with little or no existing insulation should target R-60; homes that already have some insulation can typically top up to R-38 or R-49. This calculator estimates your current R-value from the depth of your existing insulation and recommends a target for the Tulsa area. Call (918) 734-4444 for a free attic assessment.

Installed prices in the Tulsa area typically run $0.05–$0.08 per square foot per inch for blown fiberglass, $0.07–$0.10 for cellulose, and $1.00–$1.40 for closed-cell spray foam. A typical 2,200 sq ft attic topped up to R-49 with cellulose usually lands between $1,600 and $2,500 installed. Use the calculator above for your home, then call (918) 734-4444 for an exact quote.

Adding insulation to an under-insulated attic typically cuts heating and cooling costs by 10–20%. The U.S. Department of Energy estimates most homes can save up to 15% on heating and cooling costs, and savings are higher for severely under-insulated attics. This calculator estimates your annual savings from your attic size and the size of the upgrade. Many Tulsa homeowners see a simple payback of 2–6 years.

Closed-cell spray foam delivers roughly 6.0 R-value per inch — nearly double fiberglass or cellulose — and seals air leaks at the same time, which is often where most energy loss happens. It costs more per square foot, but it can be the better value in unconditioned attics with ductwork. Use the calculator to compare payback, or ask us for a side-by-side quote.

Simple payback is the installed cost of the insulation divided by the estimated annual energy savings. For example, a $2,000 insulation job that saves $500 a year pays for itself in 4 years. This calculator uses installed Tulsa pricing and a 10–20% savings band based on your attic size and how much insulation you are adding.