St. Peters is built on 1980s and 1990s split-levels and two-stories, the kind of house where the original attic insulation has flattened down to almost nothing and your heating and cooling bills have crept up year after year. These homes sit on basements or crawl spaces, with attics that bake at 130 to 150 degrees in July and drop into the teens in January, and the walls between were framed and closed up without any cavity insulation at all.
When homeowners in St. Peters (63376) and around the St. Louis area need to bring those bills back down and stop the temperature swings from room to room, they call St. Louis Spray Foam Insulation. We have been doing this work since 2012, and we know exactly what a 1980s split-level needs to perform the way it should.
Spray Foam Insulation in St. Peters (63376)
Your St. Peters home sits in the ring of suburbs where 1980s and 1990s construction is now hitting the age where original attic insulation has compressed flat, empty wall cavities are letting conditioned air leak straight out, and crawl spaces and rim joists have become thermal weak spots that pull heat out in winter and let humidity in during the summer. The attic temperature swings are brutal, and so is the condensation risk when humid air from the living spaces rises into a cold attic in winter or when summer humidity drives inward through walls and into an unconditioned crawl space.
Spray foam insulation seals and insulates in one step. We spray closed cell or open cell foam into attics, into the walls of rooms that never reach temperature, into crawl spaces and rim joists, and around the band board where the house sits on its foundation. The foam expands, fills every gap, and stops air leakage and moisture drive cold. We also remove and replace insulation that has gotten wet, settled, or contaminated, and we handle the air sealing around it that makes the whole assembly work together. Since 2012 we have been serving St. Peters and the St. Louis area with fully insured crews and honest estimates that specify the R-value and thickness we are putting in.
Our services in St. Peters
- Attic Spray Foam Insulation in St. Peters · Open-cell roof-deck foam turns an attic that bakes at 140°F in July and freezes…
- Closed Cell Spray Foam Insulation in St. Peters · Two-pound closed-cell foam delivers R-6.5 per inch with its own vapor retarder…
- Open Cell Spray Foam Insulation in St. Peters · Half-pound open-cell foam air-seals attics and walls at a friendlier price per…
- Wall & Injection Foam Insulation in St. Peters · Injection foam fills closed frame walls through small drilled ports…
- Crawl Space Spray Foam Insulation in St. Peters · Closed-cell foam on crawl space walls and subfloors ends the cold floors of…
- Rim Joist & Band Joist Spray Foam in St. Peters · Basement rim joists leak more cold air than almost anything in a St. Louis…
- Garage Spray Foam Insulation in St. Peters · Garage ceilings under bonus rooms and walls shared with the house are…
- Metal Building & Barndominium Spray Foam in St. Peters · Closed-cell foam stops a Missouri metal building from sweating in spring and…
- Commercial & New Construction Spray Foam in St. Peters · Warehouses; offices; churches and production builders served on schedule.
- Insulation Removal in St. Peters · Old blown-in and batts vacuumed out before any new foam goes in, never buried.
- Insulation Replacement & Re-Insulation in St. Peters · The full reset: old material removed; gaps air-sealed…
- Air Sealing in St. Peters · Top plates; can lights; chimney chases and attic hatches leak more heated and…
How a Job Works in St. Peters
We start with a free on-site assessment. We walk your attic, crawl space or the walls you want to address, we look at what is there now, we check for moisture or damage, and we talk through what open cell or closed cell foam makes sense for your use and your budget. We give you a written estimate with the R-value and thickness we plan to spray, the area we are covering, and the price.
On the day of the work, we set up mechanical ventilation to manage odor during the cure, we protect floors and fixtures, and we spray the foam to the thickness and density the estimate calls for. If old insulation has to come out first, we remove it and haul it away. We do not spray over wet, contaminated or leaking substrates, and we do not spray a crawl space with standing water. We fix the moisture first or we walk away. Your home will need to stay ventilated and unoccupied for 24 to 48 hours while the foam cures, and we will tell you the exact re-entry window when we are done.
We clean up after ourselves, we do a final walkthrough with you, and we leave your property the way we found it except for the insulation and air sealing that is now in place.
Attic spray foam in St. Peters typically runs from $1.50 per square foot for open cell to $1.20 per board foot for closed cell, depending on the thickness and R-value you need and whether old insulation has to come out first. A crawl space foam job starts around $2,500. Wall injection foam for rooms that do not heat or cool runs from $2 per square foot. Rim joist and band joist sealing starts at $650. If your insulation is wet, matted or contaminated and has to be removed and replaced, budget $2,800 and up, depending on the area and what goes back in. The real cost drivers are the square footage or board footage to cover, the R-value and thickness you choose, whether you are spraying open or closed cell, how much old material has to come out, and how easy or tight the access is. We give you a free written estimate with all of that spelled out at (314) 912-1801. Call us or reach out and we will walk your job and give you a price that is honest and competitive.
✅ Written Estimates with R-Value & Thickness Specs, fully insured for work in St. Peters and nearby areas.
