Most Oklahoma City homes run their air handler and ductwork through the attic. On a July afternoon, when outdoor highs sit in the upper 90s, a vented attic can pass 140°F, and every foot of duct running through it heats the air before it reaches your rooms. More insulation on the attic floor helps the ceilings, but it does nothing for those ducts.
Spray foam on the underside of the roof deck changes that. Polyurethane foam fills every rafter bay, seals the decking and gable walls, and turns the attic into a sealed, semi-conditioned space that stays much closer to indoor temperature. Ducts stop gaining heat, rooms far from the thermostat finally keep up, and the system runs shorter cycles through the long Oklahoma cooling season.
Before we quote roof deck foam, we inspect the decking for moisture and past hail or leak damage, check bath fan and dryer vent terminations, and compare it honestly against blown-in insulation on the attic floor. When your ducts are not in the attic, blown-in is often the better value, and we will tell you.
Oklahoma City tip
When the roof deck is foamed, soffit and ridge vents are sealed as code allows and the attic becomes unvented. That is correct for a foamed attic. A crew that sprays the deck but leaves the eaves open is mixing two different attic designs.
Signs Your OKC Attic Is a Good Fit for Spray Foam
- ✓Air handler or ductwork in the attic
- ✓Upstairs or bonus rooms several degrees warmer than downstairs
- ✓Ducts that sweat or feel hot in the attic
- ✓Vaulted ceilings with shallow rafters
- ✓Dust lines at ceiling vents and light fixtures
- ✓Summer electric bills that climb every year
Open-Cell or Closed-Cell Foam for an Oklahoma City Attic
Open-cell foam is the usual choice for OKC roof decks. It provides about R-3.5 to R-3.8 per inch, is typically sprayed 5.5 to 7 inches deep, dampens hail and rain noise, and costs about $0.45 to $0.80 per board foot installed.
Closed-cell foam provides about R-6 to R-7 per inch and works as a vapor retarder at about 1.5 inches. It fits vaulted and cathedral ceilings where rafters are too shallow for open-cell, and typically costs about $1.00 to $2.00 per board foot. A board foot is one square foot at one inch thick.
Attic Spray Foam Insulation Services We Offer
✓Roof Deck Spray Foam
A sealed, semi-conditioned attic for ducts and air handlers.
✓Vaulted and Cathedral Ceilings
Closed-cell foam where rafters are too shallow for batts.
✓Bonus Room Insulation
Knee walls, slopes and garage ceilings around upstairs rooms.
✓Gable Wall Sealing
Foam on gable ends so the sealed attic stays sealed.
✓Ignition Barrier Coating
Code-required coating over exposed attic foam where needed.
Attic Spray Foam Insulation Cost in Oklahoma City, OK
| Project | Typical Range | What Affects It |
|---|---|---|
| 1,500 sq ft attic roof deck, open-cell 5.5 in | $3,700–$6,600 | Pitch, hips, valleys and access |
| 2,000 sq ft house roof deck, open-cell 5.5 in | $5,700–$11,400 | 2,300 to 2,600 sq ft of deck |
| Closed-cell instead of open-cell | Add about 40–100% | R-value per inch and moisture control |
| Old insulation removal first | $0.75–$2.00 per sq ft | Depth and contamination |
Planning ranges for Oklahoma City homes. Your free estimate gives the exact written price after we measure the roof deck.
How It Works
- 1
Attic Inspection
We check decking, ducts, vents, wiring and existing insulation.
- 2
Prep and Masking
Rooms below are protected and vents are sealed as code allows.
- 3
Spray in Passes
Foam goes on in controlled passes to the planned depth.
- 4
Depth Check
We probe depths with you, clean up and review the work.
Related reading: What R-Value Does an OKC Attic Need? Attic Insulation Cost in Oklahoma City