
Serving O Fallon, IL and surrounding areas
Approved
In business since 2022
Free estimates
Emergency services offered
"Foam Co did an excellent job, very prompt, informative and priced competitively. Highly recommend!"





+15


Serving O Fallon, IL and surrounding areas
Approved
In business since 2022
Free estimates
Emergency services offered
"Foam Co did an excellent job, very prompt, informative and priced competitively. Highly recommend!"





+15

Serving O Fallon, IL and surrounding areas
Approved
Super Service Award Winner
In business since 2021
Free estimates
Small jobs welcome
"The team at West County Insulation came out to remove and install new attic insulation for my home. Throughout the process they had quick communication and were always on top of the project. Recommend for anyone else to use."

Serving O Fallon, IL and surrounding areas
Approved
In business since 2021
Free estimates
Emergency services offered
"Great prompt service. We had some insulation and sheetrock installed in order to complete some remodeling. Very happy the work done. We called on Friday and they did the work the following Monday. Did the work quickly, and on time, and on budget."




Serving O Fallon, IL and surrounding areas
Approved
In business since 2021
Free estimates
Credit card accepted
Good Attic is a trusted attic insulation and home comfort company serving homeowners throughout St. Charles and the greater St. Louis area. We specialize in blown-in insulation upgrades, air sealing, attic cleanouts, and ventilation improvements that solve hot/cold rooms, drafts, high energy bills, and poor airflow. Our team provides honest pricing, same-week appointments, and detailed before-and-after photos so you always know exactly what you’re getting. If you want a cleaner, more comfortable, and more energy-efficient home, Good Attic delivers results you can feel immediately.

Serving O Fallon, IL and surrounding areas
Approved
Super Service Award Winner
In business since 2025
Free estimates
Credit card accepted
"Work was good and quick but pricey"

Serving O Fallon, IL and surrounding areas
In business since 2001
Free estimates
Credit card accepted
"We had St. Louis Insulation seal and insulate the crawlspace in our one-story 3-bedroom brick home in early December. The existing insulation was probably original from the mid-70s and was falling from the ceiling of the crawlspace, about half already on the floor. SLI provided an estimate and described their procedure -- sealing, not just replacing the rolls of insulation but sealing the floor and walls and vents. They described the timeline for the work. The estimate was pricey, but well in line with other providers of the same service, and it's a one-time job, not an every-20-years job. Ultimately we selected SLI as we were impressed by reviews of their work and by their professionalism and the clarity of their description of the work to be done. They arrived punctually and performed the work very fast, considering the nature of the work (removing all old insulation and all the other debris down there, putting in the new plastic and insulation and foam spray). I was very impressed by their politeness, efficiency, and the cooperation they showed in working together. (They're in the crawlspace and so if they had yelled or even been grumpy with each other, I'd have heard it.) They removed approximately 24 very large stuffed trashbags of old insulation (it's a large crawlspace) and stacked them neatly on the driveway, then put everything in their truck and hauled it away. (That was the first day.) They brought in the supplies of the new work -- holy cow, lots of plastic, tanks for the foam spray etc -- and quickly installed all of it. (That was another half-day.) They supplied photos of the work so that I didn't need to get into the crawlspace to see what they'd done. The work was fully completed within the time they had estimated. And everything they did was cleaned up. I would recommend, without reservation, their work. Great people, very professional, and they clearly have done this enough that they are very well organized. Because the entrance to our crawlspace is in the floor of a bedroom closet, they kept that bedroom closed while they were working, and took everything in and out via a window. It kept any mess localized, so that I did have to do a thorough cleaning of the carpet and all surfaces in the room but it was only one room, and I was cleaning the dust basically -- all their supplies and any trash were totally removed. So A+ on that. One small unforeseen issue was that we have small dogs, and we had not thought about the spray foam and any fumes, and SLI did not think of that either, until the day they were going to do the spray foam. We had to quickly move the dogs to another part of the house, and near a window, where they would be less exposed. (They're pugs so I think the fumes would not be an issue for a larger dog -- we just need to be careful because they're pugs.) If you have small dogs, or pet birds, you will want to consider how to keep them safe during the foam spray. Overall, St. Louis Insulation did a great job. They said exactly what they'd do, and they did it. Considering the nature of the work required (bending or kneeling in a crawlspace, hauling huge bags of old insulation and rolls of plastic while bending or kneeling), I am hugely impressed with the professionalism and with their good-natured attitude. They are very good at what they do."





+40

Serving O Fallon, IL and surrounding areas
In business since 2022
Free estimates
Credit card accepted
"Our experience with Koala was great from very first phone call. Office is very organized and friendly. Joe came out, inspected our attic and gave us best options to be more energy and cost efficient. He was very knowledgeable and friendly and didnâ  t push a sales pitch!!! Jeremy and his coworker were very professional, polite, and task oriented. They were quick and efficient, and cleaned up after themselves. They did a great job! Would highly recommend this company for your insulation needs!!!"



Serving O Fallon, IL and surrounding areas
In business since 2016
Free estimates
Credit card accepted
"Excellent, profession-ism, they do a quick job."

Serving O Fallon, IL and surrounding areas
In business since 2022
Free estimates
Credit card accepted
"I’m a land lord of 72 residential properties and the biggest head ache other than common upkeep was the constant battle with roaches and insects inside the units, I had Triple B come out and put their pest control infused insulation at 10 of my properties and within 3 weeks the tenants were in shock at how affective it was, they went from seeing them everyday to hardly ever, I ended up getting them to do all my units and also my own house, this will be a must at any property I ever purchase, highly suggested for new home owners/buyers"





+1

Serving O Fallon, IL and surrounding areas
In business since 2007
Emergency services offered
Credit card accepted
"All services were performed in a professional and timely manner.
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From average costs to expert advice, get all the answers you need to get your job done.

Budget for attic insulation costs based on factors such as attic size, insulation type, amount of insulation needed, labor, and more.

The cost of soundproofing a room depends mainly on the size of the room and the material used. This guide can help you plan your project budget.

Budget for radiant barrier costs based on factors such as foil type, attic size, material quality, ventilation type, labor, and more.

Budget for the costs of a roll of insulation based on factors such as R-value, labor, materials, square footage, alternative options, and more.

Spray foam insulation costs depend on the area size, foam type and thickness, and how the pro installs it. We break down the cost to help you budget.

Create a budget for new insulation using this cost guide, featuring the most important price factors to consider.