Greater Houston
Spray Foam Insulation Cost Estimator — Houston, TX
Get a ballpark on your project before you call. Enter your space type and size and we'll show you a realistic price range for open cell, closed cell, blown-in, metal buildings, crawl spaces, and more. Free, no signup required, takes 60 seconds.
How Pricing Works (Plain English)
Board feet drive cost. Board feet = square feet × inches. More inches or more area = higher cost.
- Foam type matters. Open-cell is budget-friendly and great for sound; closed-cell delivers higher R-value per inch, rigidity, and moisture control—popular for metal buildings and barndos.
- Access & height. Tight attics, tall interiors, lifts, or obstructions can affect labor time.
- Code coatings. Exposed foam in attics/garages/metal buildings may require an ignition or thermal barrier coating.
- Location. Drive time and logistics vary by city (Houston vs The Woodlands, Galveston, College Station, etc.).
Typical Projects We Spray in Greater Houston
Interior and exterior wall cavities during remodels or new builds
- Barndominiums (shell + living space assemblies)
- Crawlspaces, rim joists, garages, and bonus rooms
- Metal buildings, shops, warehouses, and commercial shell spaces
- Specialty: shipping containers, cold rooms, and sound control
Our Process
Scope & target R-value. We confirm assemblies and code requirements for your city.
- Codes, Barriers & R-Values (Quick Guide)
- Surface prep. Masking, protection, and substrate readiness (wood, metal, masonry).
- Spray & verification. Trained techs apply foam to spec; we check thickness and adhesion.
- Ignition/thermal barrier (if required). We apply code-compliant coatings where foam stays exposed.
- Cleanup & handoff. We remove masking, walk the project, and provide maintenance tips.
- R-value measures resistance to heat flow—higher R means better insulation. Many Houston-area rooflines target R-30+, while walls commonly target R-13 to R-21 depending on assembly. If foam is exposed to a storage or mechanical area, the building code typically requires an ignition barrier (or a thermal barrier in specific use cases). The calculator above includes an allowance when you select those options—or choose “I’m not sure” and we’ll guide you.
Our Process
Every project follows the same proven process — free assessment to final documentation.
- 01
How big is it?
- 02
Material & Thickness
Frequently Asked Questions
1) What are you insulating?
Ballpark only. Final bid depends on access, height, obstructions, and on-site inspection. Spray Foam Insulation in Houston: Pricing, Options & Service Areas Use the calculator above to estimate your cost, then explore the information below to understand how pricing works for open-cell and closed-cell spray foam insulation across Houston, The Woodlands, Conroe, Katy, Cypress, Sugar Land, Pearland, Galveston, Freeport, and College Station. Phantom Foam installs foam for homes, barndominiums, metal buildings, warehouses, crawlspaces, and remodels throughout the Greater Houston area. Tap one Blown-In (Avg Market) Crawlspace / Rim Metal Building / Shop Pole Barn / Barndo Shipping Container Use a home preset or enter square footage. 2 bed / 1 bath (~1,200) 3 bed / 2 bath (~1,600) 4 bed / 3 bath (~2,200) Choose foam and thickness. Foam type Open-cell ($0.50/bf) Closed-cell ($1.25/bf) Thickness (in) Coating (optional) Ignition barrier (+$0.35/sf) Thermal barrier (+$0.75/sf) Estimated Total Confidence: Medium 0 bf × $0.50 (Open-cell) Board feet: 0 Area priced: 0 sq ft Rate: $0.50/bf
Open-Cell vs Closed-Cell—Which Should I Choose?
Open-cell (~R-3.7/in) expands aggressively, fills gaps, and deadens sound—commonly used along the roofline in attics and interior walls behind drywall. Closed-cell (~R-6.8/in) is dense and structural, adds shear strength, resists moisture, and can act as a vapor barrier at sufficient thickness—ideal for metal buildings, rim joists, containers, and high-humidity spaces. Not sure? Start with the calculator and select “I’m not sure” for guided defaults, or read our detailed guides: Open-Cell Spray Foam and Closed-Cell Spray Foam.
Serving Greater Houston
Get a Free Estimate
Licensed, insured, and 0% interest financing available. Monday through Saturday scheduling.