Creve Coeur's 1950s and 1970s custom ranches and two-story homes sit on large wooded lots and deep basements, and many are in the middle of a serious renovation cycle right now. If your attic hits 140 degrees in July and drops to single digits in January, or if you are replacing old insulation that has settled flat or gone damp, spray foam insulation and air sealing are the fastest way to stop the temperature swings and the bills that come with them.
St. Louis Spray Foam Insulation has served Creve Coeur and the surrounding St. Louis area since 2012. We work in occupied homes, we coordinate around existing HVAC and roofing, and we pull out contaminated or failed insulation before we spray. Our team is fully insured, and every estimate includes the R-value and thickness you need to hold the building department accountable.
Spray Foam Insulation in Creve Coeur (63141)
The homes in Creve Coeur were built to last, and they have. The trade-off is that the attics and rim joists were insulated decades ago with fiberglass batts and blown-in fiber that have settled, compacted, or absorbed moisture from the humid St. Louis summers. The basement rim joist, where the rim band sits on top of the foundation wall, is often uninsulated or insulated only with batts that have pulled away from the rim. Closed-cell spray foam seals both the attic and the rim joist in a single pass, stops air leakage, and handles the seasonal vapor drive that flips from outward in winter to inward in summer. Open-cell foam costs less and works well in attics where closed-cell is overkill. Wall cavities in the original construction are often empty or have settled fiber, and injection foam fills them without tearing open the walls.
We have been doing this work in Creve Coeur and across the St. Louis area since 2012. We know the building stock, the moisture patterns, and the way basements and attics behave in this climate. We also know when the cheaper option is the right one, and we say so.
Our services in Creve Coeur
- Attic Spray Foam Insulation in Creve Coeur · Open-cell roof-deck foam turns an attic that bakes at 140°F in July and freezes…
- Closed Cell Spray Foam Insulation in Creve Coeur · Two-pound closed-cell foam delivers R-6.5 per inch with its own vapor retarder…
- Open Cell Spray Foam Insulation in Creve Coeur · Half-pound open-cell foam air-seals attics and walls at a friendlier price per…
- Wall & Injection Foam Insulation in Creve Coeur · Injection foam fills closed frame walls through small drilled ports…
- Crawl Space Spray Foam Insulation in Creve Coeur · Closed-cell foam on crawl space walls and subfloors ends the cold floors of…
- Rim Joist & Band Joist Spray Foam in Creve Coeur · Basement rim joists leak more cold air than almost anything in a St. Louis…
- Garage Spray Foam Insulation in Creve Coeur · Garage ceilings under bonus rooms and walls shared with the house are…
- Metal Building & Barndominium Spray Foam in Creve Coeur · Closed-cell foam stops a Missouri metal building from sweating in spring and…
- Commercial & New Construction Spray Foam in Creve Coeur · Warehouses; offices; churches and production builders served on schedule.
- Insulation Removal in Creve Coeur · Old blown-in and batts vacuumed out before any new foam goes in, never buried.
- Insulation Replacement & Re-Insulation in Creve Coeur · The full reset: old material removed; gaps air-sealed…
- Air Sealing in Creve Coeur · Top plates; can lights; chimney chases and attic hatches leak more heated and…
How a Job Works in Creve Coeur
We start with a free on-site assessment. We walk the attic, the crawl space, and the rim joist with you, take measurements, identify any moisture, contamination, or failed insulation that has to come out first, and explain what we are going to spray, where, and why. We answer questions, and we give you a written estimate with the R-value and thickness specified so you know exactly what you are getting and what it costs.
On the day of the work, our crew sets up mechanical ventilation to manage the smell during application and cure. We spray the foam to the thickness and coverage specified in your estimate, and we work around occupied rooms and furniture. Spray foam cures fully in 24 to 48 hours, and we tell you the re-entry window up front so you can plan your week. If you are living in the house during the work, the ventilation we run keeps the space safe and livable.
When the foam is cured, we clean up, do a final walkthrough with you, and answer any questions about maintenance or future work. Your property leaves clean.
Attic spray foam in Creve Coeur typically runs from $1.50 per square foot for open-cell foam to $1.20 per board foot for closed-cell, depending on the depth and R-value you need and whether existing insulation has to come out first. A 1,500-square-foot attic with old blown-in fiber that needs removal and replacement runs roughly $2,800 to $4,500 depending on access and the foam type. Wall injection foam runs from $2 per square foot. Rim joist and band joist sealing starts at $650. Crawl space encapsulation with spray foam and air sealing typically runs $2,500 and up. The main cost drivers are the area to cover, the R-value and thickness specified, whether you choose open or closed cell, and what has to be removed before we spray. Call us at (314) 912-1801 for a free estimate. We measure on site, we quote what you actually need, and there are no surprises.
✅ Written Estimates with R-Value & Thickness Specs, fully insured for work in Creve Coeur and nearby areas.
