Quick Homeowner Estimator

Pick what you’re insulating, enter size, and get a ballpark.

  1. 1) What are you insulating? Tap one
  2. 2) How big is it? Presets or manual
  3. 3) Material & Thickness
Estimated Total Confidence: Medium

$0.00

Board feet: 0
Area priced: 0 sq ft
Rate: $0.00
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.

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.).

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.

Typical Projects We Spray in Greater Houston

  • Home attics, knee walls, cathedral ceilings, and conditioned rooflines
  • Interior and exterior wall cavities during remodels or new builds
  • Metal buildings, shops, warehouses, and commercial shell spaces
  • Barndominiums (shell + living space assemblies)
  • Crawlspaces, rim joists, garages, and bonus rooms
  • Specialty: shipping containers, cold rooms, and sound control

Our Process

  1. Scope & target R-value. We confirm assemblies and code requirements for your city.
  2. Surface prep. Masking, protection, and substrate readiness (wood, metal, masonry).
  3. Spray & verification. Trained techs apply foam to spec; we check thickness and adhesion.
  4. Ignition/thermal barrier (if required). We apply code-compliant coatings where foam stays exposed.
  5. Cleanup & handoff. We remove masking, walk the project, and provide maintenance tips.

Codes, Barriers & R-Values (Quick Guide)

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.

Where We Work

Phantom Foam serves Greater Houston and surrounding towns, including: Houston, The Woodlands, Conroe, Spring, Magnolia, Tomball, Katy, Cypress, Sugar Land, Pearland, Pasadena, League City, Baytown, Galveston, Freeport, Angleton, Rosenberg, Brenham, College Station—and nearby rural areas. View our hub page: Spray Foam Insulation in Houston.

Why Homeowners & Builders Choose Phantom Foam

  • Texas-trained installers and precise thickness control for consistent R-values
  • Clean, protected job sites and clear communication from estimate to final walkthrough
  • Local knowledge of Houston-area codes, humidity, and building assemblies
  • Fast quoting (same-day estimates available) and reliable scheduling

FAQs

How accurate is the calculator?
It uses typical Houston market rates and project modifiers to provide a planning estimate. For a firm price, we verify access, height, coatings, and assemblies on site.
Do I need an ignition or thermal barrier?
If foam remains exposed in attics, garages, or metal buildings, code usually requires a protective coating. Select it in the calculator—or choose “I’m not sure.”
Open-cell vs closed-cell—what’s best?
Open-cell is cost-effective and great for sound behind drywall. Closed-cell offers the highest R per inch, rigidity, and moisture resistance—great for metal or exterior-facing assemblies.
How soon can you start?
We service Houston and surrounding cities daily. After a site check, most residential projects schedule quickly based on crew availability.