Fully Insured, in St. Louis and surrounding areas. Attic Spray Foam Insulation · Closed Cell Spray Foam Insulation · Open Cell Spray Foam Insulation.
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All your work handled by qualified professionals in St. Louis
Sealed attics that keep St. Louis ductwork out of July heat and January cold
Included in your service
Two-pound foam for walls where Missouri vapor drive flips every season
Included in your service
The friendlier board foot for St. Louis attics and interior walls
Included in your service
Closed walls filled without opening up a Florissant ranch
Included in your service
Crawl spaces under St. Louis additions sealed against cold floors
Included in your service
The small job that finally warms a St. Louis basement and first floor
Included in your service
Turning a St. Peters garage into space you can use all year
Included in your service
The insulation that stops a Missouri shop from sweating and frosting
Included in your service
St. Louis warehouses and production builds kept on their own schedule
Included in your service
In a St. Louis attic the old comes out before anything new goes in
Included in your service
A full reset for St. Louis attics twenty years past their job
Included in your service
The cheapest comfort fix in a St. Louis house and it comes first
Included in your service
Pick the job, tell us roughly how much surface has to be covered, and see the range we actually work in. No email wall, no waiting.
Tell us the area to cover and we'll send your free written estimate →
Indicative ranges only. Final pricing depends on the thickness and R-value specified, what has to come out first, access, and whether open or closed cell is the right product. Measured on site at the board foot. Minimum job charges apply on small jobs.
Reach us by phone at (314) 912-1801 or fill out the estimate form. We get back to you within 24 hours, no commitment required.
Our Spray Foam Insulation Contractor visits your property, evaluates the project, and provides a written quote before any work begins.
Our crew completes the spray foam insulation and leaves your property clean and tidy. Full cleanup is included.
Continuous training, professional equipment, meticulous and code-compliant work
Full coverage on all our job sites, no exceptions
Emergencies, weekends, holidays: available when you need us
Response within 24h, no commitment, by phone or form
Available Mon-Sat 7am-6pm
We serve in St. Louis and surrounding areas · On-site visits included · Free estimate within 24h
St Louis Spray Foam Insulation is a team of local, fully insured professionals based in St. Louis. We respond quickly in St. Louis and surrounding areas with professional equipment suited to every job.
Free estimate, transparent pricing, no subcontracting. Tell us about the space. We'll handle the rest.
📞 Call (314) 912-1801⭐⭐⭐⭐⭐ 4.9/5 · 29 verified Google reviews
“We had them seal up our attic access area with spray foam and it made such a difference. The crew was in and out in about 3 hours, and they cleaned up every bit of mess. Our upstairs is finally staying warm in winter.”
Attic Spray Foam Insulation
“Really impressed with how they handled our attic project. They sealed around the access hatch area and the whole attic space with open cell foam. The difference in our energy bills was noticeable right away.”
Attic Spray Foam Insulation
“Our old attic had almost no insulation left, so we called St Louis Spray Foam to re-insulate the whole thing. They removed the deteriorated stuff and sprayed open cell foam throughout. The crew was professional and the work looks great. Only thing is they took a bit longer than estimated, but the quality made up for it.”
Open Cell Spray Foam Insulation
“Had them come out to seal air leaks around our ventilation penetrations in the attic. Small job but they treated it like it mattered, which it does when you're trying to control your heating costs.”
Air Sealing
“Converted our garage into a workshop and needed it insulated. They sprayed closed cell foam on all the walls and the overhead door area. It's night and day, stays warm in winter and I can actually work out there now without freezing.”
Garage Spray Foam Insulation
“We had a cold basement and our energy guy recommended sealing the rim joists. St Louis Spray Foam came in, foamed the entire perimeter band joist area with closed cell, and it stopped the drafts completely. Very satisfied with the results.”
Rim Joist & Band Joist Spray Foam
“We're finishing a metal barn into living space out in the country and needed the whole thing insulated. They sprayed closed cell foam on the walls and roof deck, about 2,400 square feet. Professional crew, stayed on schedule, and the insulation job is solid.”
Metal Building & Barndominium Spray Foam
“Our 1950s house had zero insulation in the exterior walls. Instead of tearing everything apart, they drilled and injected closed cell foam into the cavities. Three days of work and we went from freezing to comfortable. Wish we'd done it sooner.”
Wall & Injection Foam InsulationReal photos of our work in St. Louis · Each image shows the final result achieved for our clients
Indicative estimates: your free personalized quote is always exact
| Service / Criteria | Indicative Rate |
|---|---|
| Open-Cell Attic Floor Spray with Air Sealing | Starting at $1.50/sq ft |
| Closed-Cell Roof Deck Spray (Sealed Attic) | Starting at $3.00/sq ft |
| Removal and Replacement (Full Retrofit) | Starting at $2.50/sq ft |
| Rim Joist and Band Joist Air Sealing Only | Starting at $800 |
| Travel and Estimate | Free |
| Service / Criteria | Indicative Rate |
|---|---|
| Rim Joist and Band Joist Sealing | Starting at $1.20/board ft |
| Foundation Wall Insulation | Starting at $1.20/board ft |
| Metal Building and Roof Deck Insulation | On estimate |
| Sealed Attic and Roof Deck Spray | On estimate |
| Travel and Site Inspection | Included |
| Service / Criteria | Indicative Rate |
|---|---|
| Open Cell Spray Foam Attic | Starting at $0.55/board ft |
| Wall Cavity Injection Foam | Starting at $0.60/board ft |
| Rim Joist and Band Joist Sealing | Starting at $0.65/board ft |
| Insulation Removal and Replacement | On estimate |
| Travel and Mobilization | Included |
| Free Written Estimate | No cost |
| Service / Criteria | Indicative Rate |
|---|---|
| Rim joist and band board injection (closed cell) | Starting at $2.50/sq ft |
| Wall cavity injection (open cell) | Starting at $2/sq ft |
| Combination retrofit (rim plus walls) | Starting at $3/sq ft |
| Insulation removal before injection | On estimate |
| Travel and site assessment | Included |
| Estimate | Free |
| Service / Criteria | Indicative Rate |
|---|---|
| Standard crawl space insulation | Starting at $2,500 |
| Larger or complex crawl space | Starting at $4,000 |
| Moisture assessment and remediation | On estimate |
| Travel and site visit | Included |
| Free estimate | No charge |
| Service / Criteria | Indicative Rate |
|---|---|
| Rim Joist Seal (Small Perimeter) | Starting at $650 |
| Rim Joist Seal (Full Basement) | Starting at $1,200 |
| Cantilever or Bonus Room Floor | Starting at $400 |
| Complex or Retrofit Job | On estimate |
| Travel | Included |
| Free Estimate | No obligation |
| Service / Criteria | Indicative Rate |
|---|---|
| Single-car garage ceiling | Starting at $1,200 |
| Two-car garage ceiling | Starting at $1,800 |
| Garage under finished bonus room | Starting at $2,500 |
| Insulation removal and replacement | Add $300 to $600 |
| Travel and estimate | Included |
| Service / Criteria | Indicative Rate |
|---|---|
| Metal Building Roof Deck (2-3 inches closed-cell) | Starting at $1.75/sq ft |
| Barndominium Full Envelope (roof, walls, rim) | Starting at $2.25/sq ft |
| Wall Cavity Fill or Band Joist Sealing | Starting at $2.00/sq ft |
| Substrate Preparation or Removal of Old Insulation | On estimate |
| Travel and Consultation | Included |
| Free Written Estimate | No obligation |
| Service / Criteria | Indicative Rate |
|---|---|
| Free Commercial Estimate | Free |
| Closed Cell Spray Foam | Starting at $1.25 per board foot |
| Open Cell Spray Foam | Starting at $0.85 per board foot |
| Insulation Removal and Replacement | On estimate |
| Travel and Mobilization | Included |
| Estimate Response Time | Within 24 hours |
| Service / Criteria | Indicative Rate |
|---|---|
| Small attic removal (under 1,000 sq ft) | Starting at $950 |
| Standard attic removal (1,000 to 2,000 sq ft) | Starting at $1,400 |
| Large or complex removal (over 2,000 sq ft or tight access) | Starting at $2,000 |
| Failed spray foam removal | On estimate |
| Travel and setup | Included |
| Free estimate | No charge |
| Service / Criteria | Indicative Rate |
|---|---|
| Attic insulation replacement with closed-cell foam | Starting at $2,800 |
| Rim joist and band joist sealing | Starting at $1,200 |
| Wall cavity injection foam retrofit | Starting at $2,200 |
| Crawl space insulation replacement | Starting at $1,500 |
| Complex or multi-zone replacement project | On estimate |
| Free estimate and consultation | No charge |
| Service / Criteria | Indicative Rate |
|---|---|
| Attic hatch and can light sealing | Starting at $650 |
| Rim joist and top plate sealing | Starting at $1,200 |
| Complete air sealing retrofit | Starting at $2,800 |
| Complex or large-scale job | On estimate |
| Travel and estimate | Included |
Indicative rates, actual cost varies with project size, materials, and site access. Free personalized estimate within 24h.
Spray Foam Insulation in St. Louis · Response within 24h · No commitment · ☎ (314) 912-1801
Your Free Quote Request