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Spray Foam Insulation in West Alton, MO (63386) · Local Professionals

St Louis Spray Foam Insulation · Fast response in West Alton and the St. Louis area · Free estimate 24h

✅ Written Estimates with R-Value & Thickness Specs 🛡️ Fully Insured 💸 Free Quote 24h 🕐 Mon-Sat 7am-6pm
🎯 Get a Free Quote 📞 (314) 912-1801
+29Verified Reviews
14Years in Business
4.9 ★Google Rating
24/7Available
✅ No hidden fees💳 Cards accepted🛡️ Fully Insured✅ Written Estimates with R-Value & Thickness Specs

West Alton is part of our service area in St. Louis. St Louis Spray Foam Insulation delivers professional spray foam insulation services in West Alton with the same high standards we apply across all job sites. We work with homeowners, HOAs, and commercial property managers. West Alton's raised homes between two rivers rely on closed cell rated for flood exposure.

Our services in West Alton

Why choose St Louis Spray Foam Insulation in West Alton?

St Louis Spray Foam Insulation is a fully insured spray foam insulation company serving in St. Louis for 14 years. In West Alton as throughout our area, we adapt our methods to local humidity and condensation risk, attic and crawl space access, and the age and construction of the building. Our crews are available Mon-Sat 7am-6pm.

Free estimate for West Alton

We offer a free, no-obligation estimate within 24h for any job in West Alton (63386). No travel charge, no surprises: the price we quote is the price you pay. Call us or fill out the form below to schedule your service.

Do you offer services in West Alton?
Yes, we serve West Alton (63386) regularly for attic spray foam insulation, closed cell spray foam insulation, open cell spray foam insulation. Free estimate within 24h. Call (314) 912-1801.
How quickly can you respond in West Alton?
Within 24 to 48 hours for urgent jobs in West Alton. For scheduled work, we book around your availability, available Mon-Sat 7am-6pm.
Is travel to West Alton included in the estimate?
Yes, travel to West Alton is always included in our estimates. No hidden fees.

Nearby service areas

📍 St. Louis 63101📍 Chesterfield 63017📍 St. Charles 63301📍 O'Fallon 63366
Why choose us?

Trusted professionals since 2012

🏅

Insured contractors

Continuous training, professional equipment, meticulous and code-compliant work

🛡️

Fully Insured

Full coverage on all our job sites, no exceptions

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Available Mon-Sat 7am-6pm

Emergencies, weekends, holidays: available when you need us

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100% Free Quote

Response within 24h, no commitment, by phone or form

Our services

Our Spray Foam Insulation Services in St. Louis

All your work handled by qualified professionals in St. Louis

Attic Spray Foam Insulation

Sealed attics that keep St. Louis ductwork out of July heat and January cold

Included in your service

  • Open-cell foam on the roof deck; never just piled on the attic floor
  • Story-and-a-half knee walls and slopes closed up to stop ice dams
  • Target R-value and thickness per pass written into the estimate
  • Gable and ridge details closed properly for a two-season Missouri attic
Learn more→

Closed Cell Spray Foam Insulation

Two-pound foam for walls where Missouri vapor drive flips every season

Included in your service

  • R-6.5 per inch with its own built-in vapor retarder
  • The right call for basement foundation walls and Franklin County shops
  • Racked in controlled passes; never one thick lift
  • Depth gauged at the wall because a thin pass fails the first hard freeze
Learn more→

Open Cell Spray Foam Insulation

The friendlier board foot for St. Louis attics and interior walls

Included in your service

  • Half-pound foam that air-seals at a lower cost per board foot
  • Sound dampening for two-family flats; media rooms and shared walls
  • Where basement moisture or winter vapor calls for closed cell; we say so
  • Shaved flush to the framing and the offcuts bagged out
Learn more→

Wall & Injection Foam Insulation

Closed walls filled without opening up a Florissant ranch

Included in your service

  • Small ports drilled through a mortar joint or under a siding course; then plugged and patched
  • Built for 1940s-60s frame and brick-veneer stock with empty wall cavities
  • Solid double-brick city walls get an honest no, there is no cavity to fill
  • Every cavity probed for fill rather than assumed full
Learn more→

Crawl Space Spray Foam Insulation

Crawl spaces under St. Louis additions sealed against cold floors

Included in your service

  • Closed cell on the perimeter walls and the subfloor
  • Common under kitchen additions; sunrooms and enclosed back porches
  • Standing water and drainage fixed first or we decline the job
  • Full encapsulation referred out; the insulation is ours
Learn more→

Rim Joist & Band Joist Spray Foam

The small job that finally warms a St. Louis basement and first floor

Included in your service

  • Every joist bay sealed along the top of the foundation wall
  • Basements are everywhere here and the rim is where the cold gets in
  • Half a day on site and felt the same evening
  • On old city brick the pass is sized so the masonry can still dry
Learn more→

Garage Spray Foam Insulation

Turning a St. Peters garage into space you can use all year

Included in your service

  • Ceiling bays under bonus rooms filled and shaved flush
  • Walls shared with the house sealed against both heat and frost
  • Workshop conversions specified around the tools you actually run
  • The door header and slab edge addressed; not stepped over
Learn more→

Metal Building & Barndominium Spray Foam

The insulation that stops a Missouri shop from sweating and frosting

Included in your service

  • Closed cell straight to the underside of the roof panels
  • Franklin; Lincoln and Warren County shops; pole barns and barndominiums
  • Condensation control settled before R-value is even discussed
  • Purlins and fastener lines sealed; not sprayed around
Learn more→

Commercial & New Construction Spray Foam

St. Louis warehouses and production builds kept on their own schedule

Included in your service

  • Shells and warehouses from Earth City and Fenton to the Chesterfield Valley
  • Code-compliant assemblies documented for your county or city inspector
  • Phased around occupied floors and the Missouri build calendar
  • Ignition and thermal barrier requirements settled up front
Learn more→

Insulation Removal

In a St. Louis attic the old comes out before anything new goes in

Included in your service

  • Vacuumed straight to the truck and bagged; never buried
  • Failed spray foam cut out; the job most installers will not touch
  • Vermiculite flagged for testing and left undisturbed
  • The usual first step on 1940s-60s Affton; Lemay and Florissant homes
Learn more→

Insulation Replacement & Re-Insulation

A full reset for St. Louis attics twenty years past their job

Included in your service

  • Removal; air sealing and new foam handled as one scope
  • For material left flattened; rodent-fouled or wet after storm damage
  • Built to current code R-values; not to what was there in 1965
  • One crew and one price with no handoff between trades
Learn more→

Air Sealing

The cheapest comfort fix in a St. Louis house and it comes first

Included in your service

  • Top plates; chimney chases; can lights and the attic hatch
  • Sealed before insulating so the R-value can actually perform
  • Thermal camera images before and after on a cold or a hot day
  • Priced as its own job; never bundled in to pad a quote
Learn more→
Verified client reviews

29+ Verified Client Reviews in St. Louis

⭐⭐⭐⭐⭐ 4.9/5 · 29 verified Google reviews

Scott H.
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Scott H.
Chesterfield

“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
Karen T.
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Karen T.
St. Charles

“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
Jennifer M.
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JM
Jennifer M.
O'Fallon

“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
Kevin R.
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KR
Kevin R.
St. Peters

“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
Michelle B.
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MB
Michelle B.
Wentzville

“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
David L.
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David L.
Kirkwood

“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
Chris A.
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CA
Chris A.
Florissant

“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
Sarah W.
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SW
Sarah W.
St. Louis

“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 Insulation
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