Kirkwood's Victorian frame houses and brick bungalows from the 1920s through 1950s sit on basements that stay damp half the year, under attics that bake at 130-plus degrees in July and plunge into the teens come January. Those knee-wall attics and drafty stone basements under mature oaks are exactly where spray foam insulation does its best work, and exactly where homeowners in 63122 call us.
St. Louis Spray Foam Insulation has been serving Kirkwood and the surrounding St. Louis area since 2012. We know the building stock here, the seasonal swings that drive your heating and cooling bills, and the moisture problems that show up in crawl spaces and rim joists when spring rains come. We show up with a crew that stays until the job is done right, and we leave your property clean.
Spray Foam Insulation in Kirkwood (63122)
Kirkwood homes carry two insulation challenges that define the work we do. First, the attics: most of your houses have knee walls that frame half-story bedrooms or storage, with original fiberglass that has settled flat and lost its R-value, or with no insulation at all in the rafter bays. Second, the rim joists and band joists where the frame meets the foundation, where air leaks and condensation show up every winter. Stone basements under older homes and poured concrete under the ranches both need sealing at the rim, and both collect moisture that rises into the rim cavity and wicks into the rim board itself.
Spray foam solves both. Open cell foam in the attic lets the roof deck breathe while sealing the air leaks that let your conditioned air escape. Closed cell foam at the rim and band joist creates a vapor barrier and an air seal in one pass, and it holds up to the moisture that shows up in spring. Crawl spaces under some of your homes need the same treatment: a sealed and insulated rim, spray foam on the band joist, and sometimes the crawl space floor and walls if moisture is the problem. We've been doing this work in Kirkwood and across the St. Louis area for thirteen years, and we know which foam type solves which problem.
Our services in Kirkwood
- Attic Spray Foam Insulation in Kirkwood · Open-cell roof-deck foam turns an attic that bakes at 140°F in July and freezes…
- Closed Cell Spray Foam Insulation in Kirkwood · Two-pound closed-cell foam delivers R-6.5 per inch with its own vapor retarder…
- Open Cell Spray Foam Insulation in Kirkwood · Half-pound open-cell foam air-seals attics and walls at a friendlier price per…
- Wall & Injection Foam Insulation in Kirkwood · Injection foam fills closed frame walls through small drilled ports…
- Crawl Space Spray Foam Insulation in Kirkwood · Closed-cell foam on crawl space walls and subfloors ends the cold floors of…
- Rim Joist & Band Joist Spray Foam in Kirkwood · Basement rim joists leak more cold air than almost anything in a St. Louis…
- Garage Spray Foam Insulation in Kirkwood · Garage ceilings under bonus rooms and walls shared with the house are…
- Metal Building & Barndominium Spray Foam in Kirkwood · Closed-cell foam stops a Missouri metal building from sweating in spring and…
- Commercial & New Construction Spray Foam in Kirkwood · Warehouses; offices; churches and production builders served on schedule.
- Insulation Removal in Kirkwood · Old blown-in and batts vacuumed out before any new foam goes in, never buried.
- Insulation Replacement & Re-Insulation in Kirkwood · The full reset: old material removed; gaps air-sealed…
- Air Sealing in Kirkwood · Top plates; can lights; chimney chases and attic hatches leak more heated and…
How a Job Works in Kirkwood
We start with a free on-site assessment. You show us the attic, the basement or crawl space, the rooms that don't heat or cool right, and any spots where you've seen condensation or damp insulation. We measure the area, talk through whether open cell or closed cell foam is the right choice, and answer your questions about the work. That visit tells us what has to come out before anything goes in, whether the substrate is wet or sound, and what the real scope is.
The spray itself takes a day or two, depending on the size of the job. If you're home, we'll talk through the process: the smell during and right after the spray, the mechanical ventilation we run to pull fumes out, and the twenty-four to forty-eight hour re-entry window before you move back into that space. If insulation has to come out first (damp fiberglass, settled batts, or old vermiculite), we handle that removal and haul it away. We coordinate around your HVAC, your roof, and any other work that's happening. When we're done, we clean up, walk through the finished work with you, and make sure you know what you're looking at.
Attic spray foam in Kirkwood typically runs from $1.50 per square foot for open cell foam, depending on the thickness and R-value the building code requires at your address. Wall injection foam for closed cavities runs from $2 per square foot. Rim joist and band joist sealing starts at $650 for a typical basement perimeter. If you have a crawl space that needs sealed and insulated, expect to start at $2,500. Insulation removal runs from $950, and if you're replacing old insulation with new foam, the full re-insulation project typically starts at $2,800. The real cost depends on how much area you're covering, what R-value and thickness you need, whether you're using open cell or closed cell foam, and what has to come out first. We'll give you a written estimate with the R-value and thickness spelled out, so you know exactly what you're paying for. Call us at (314) 912-1801 for a free estimate.
✅ Written Estimates with R-Value & Thickness Specs, fully insured for work in Kirkwood and nearby areas.
