How Much Does Spray Foam Insulation Cost in Houston?
Houston Elite Spray Foam prices spray foam by the square foot, and the type of foam sets the range: $1.50 to $3.25 for open-cell and $2.50 to $5.25 for closed-cell.
For a Houston home with 1,500 to 2,000 square feet of exterior wall area, wall insulation typically comes in between $4,000 and $12,000, depending on the foam and how open the walls are.
Attics are priced on their own terms, and most of ours fall between $3,500 and $9,000. A whole house in new construction, with every cavity open and nothing to tear out, usually runs $7,000 to $16,000.
This guide breaks the cost down by foam type and by area, then covers the site conditions that push a Houston quote higher or lower.
Why Choose Houston Elite Spray Foam?
- 15+ years of spray foam experience
- On-site assessment before every job
- Open-cell and closed-cell foam options
- Attic, wall, crawl space and barndominium work
- Roofline attics that protect attic ductwork
- Metal building and pole barn condensation control
- Residential and commercial experience
- Insured, SPFA-trained crews
- Clear, itemized written estimates
- Serving Harris, Montgomery and Fort Bend counties
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Spray Foam Insulation Cost in Houston, TX
Cost by Foam Type
- Open-cell — $1.50 to $3.25 per square foot
- Closed-cell — $2.50 to $5.25 per square foot
Closed-cell carries the higher price because it is denser, takes more chemical per inch, and insulates more per inch: roughly R-6 to R-7, compared with about R-3.5 to R-3.8 for open-cell.
So the cheaper number per square foot is not automatically the cheaper job. When a cavity has a fixed depth and a target R-value, closed-cell reaches that target in fewer inches, and the gap between the two narrows once you price the result instead of the material.
Cost by Area of the House
- Attic — most projects between $3,500 and $9,000
- Walls, 1,500 to 2,000 sq ft of wall area — $4,000 to $12,000
- Pier-and-beam crawl space, sealed and foamed — $3,000 to $8,000
- Whole house, new construction — $7,000 to $16,000
New construction is the least expensive way to foam a house. Studs and rafters are exposed, there is no old insulation to haul out, and our crew is not working around furniture or finished drywall. If you are building in the Houston area, our new construction spray foam insulation costs well below a retrofit of the same house.
What Moves a Houston Quote
Access and Working Room
Retrofit pricing depends mostly on how easily we can reach the surfaces. Open framing during a remodel goes quickly; finished walls mean removing drywall or drilling and injecting, which adds labor.
Attics differ just as much. A tall hip roof with walkable decking is a different job from a low-pitch ranch attic where the crew crawls between trusses in summer heat.
Old Insulation and Radiant Barrier
Many Houston attics hold blown fiberglass or cellulose plus a foil radiant barrier stapled to the rafters. Before we foam a roof deck, loose fill over the ceiling is usually vacuumed out and the foil comes down, because foam has to bond directly to the decking. Both show up as line items.
Thickness
Our per-square-foot ranges assume a standard depth. Asking for more inches to reach a higher R-value raises the cost in proportion, so we write the depth on every estimate.
Prep and Protection
Overspray sticks to whatever it lands on. Masking floors, covering HVAC equipment in the attic and protecting belongings takes longer in a lived-in home than in a house under construction.
Air Sealing and Detail Work
Top plates, plumbing and wiring penetrations, duct boots and the attic hatch all need sealing. This detail work decides how well the job performs, so we never trim it to hit a lower number.
Where Foam Earns Most in Houston
Houston sits in climate zone 2A, with a cooling season that runs most of the year, summer highs in the mid-90s and humidity that rarely lets up. A vented attic here can climb past 140 °F on a July afternoon.
Most Houston homes also run the air handler and ductwork in that attic. Sealing the roofline with attic spray foam insulation pulls that equipment inside the conditioned space, which is usually the single biggest return on any foam project here.
Older pier-and-beam homes in neighborhoods such as the Heights, Montrose and Garden Oaks come next. Humid air under the floor reaches the cooler floor system and condenses, and crawl space spray foam insulation stops that cycle.
What Our Written Estimate Includes
- Open-cell or closed-cell for each area, and the reason
- Application thickness in inches and the resulting R-value
- Total square footage covered
- Removal and disposal of existing insulation, if needed
- The air sealing and detail work included
- Ventilation changes when an attic is converted to unvented
- Masking, protection and cleanup
- Warranty terms
We put depth and R-value in writing because they are the two figures that tell you whether the installed job matches what you paid for.
Get a Free On-Site Estimate
Access, existing insulation and attic layout only show up in person, so we come out, measure, and give you a written, itemized price for your house.
Houston Elite Spray Foam works throughout Houston and nearby areas, including Harris, Montgomery, Fort Bend, Brazoria and Galveston counties.
Priced by the Inch, Built for Houston Heat — Free Estimates Across the Metro