| Quick facts | Answer |
|---|---|
| Cost range | $2,031–$2,537 for 1,282 square feet, or about $2 per square foot. |
| Time | Many attic spray foam projects can be completed in a single day or less. |
| Who's qualified | Independent, insured spray foam insulation contractors. |
What are the R-value requirements for attics in Oklahoma?
Oklahoma adopted the 2024 IECC with amendments, effective September 14, 2026. For Oklahoma Climate Zone 3, the prescriptive ceiling requirement is R-38. Climate Zone 4 requires R-49 for ceilings.
Can other materials be used for unvented attics?
Yes, unvented attics can use fiberglass or mineral wool below the roof deck. These materials may be less costly than spray foam. OG&E guidance states finished attic insulation must be at least 13 inches deep or R-38.
What documentation is required for spray foam insulation?
Oklahoma’s residential code requires the insulation installer to provide a certification. This certification must show the thickness and installed R-value of sprayed polyurethane foam insulation. All insulation must be new material and have the R-value stated on the packaging.
What to do next
- Verify the R-value stated on the packaging of all new insulation materials.
- Ask for a certification from the insulation installer showing the thickness and installed R-value of the spray foam.
- Confirm that the proposed insulation meets the R-38 or R-49 requirement for Oklahoma Climate Zone 3 or 4, respectively.
- Call (918) 727-7715 or email [email protected] for a free quote from a independent, insured spray foam insulation contractor.
Tulsa Foam Pros is a free referral service: an independent contractor does the work and may pay us a referral fee. You never pay us anything.
