Find top-rated spray foam contractors and save up to 35% on energy bills
Compare 4 verified spray foam insulation contractors serving St. Louis, Missouri, backed by 638 customer reviews averaging 4.8★. Whether you're insulating a new build, retrofitting an existing home, or upgrading attic and crawl-space insulation, these pre-screened St. Louis contractors handle both open-cell and closed-cell spray foam. Homeowners here typically cut energy bills by around 35% — get free quotes and read verified reviews below.
Note: Actual savings vary based on home size, current insulation, energy rates, and climate conditions. These estimates are based on Department of Energy data for Cold.
Recent Reviews:
My crew did an amazing job today removing old insulation from my attic and replacing it with all new blown-in in insulation. They were very courteous they explained every move they draped off doorway so that no dust would get into my house. They removed all the debris and cleaned up impeccably afterwards. I would recommend them 100%
These guys were straightforward with fair pricing. They provide pictures of the work and pictures of any issues they see during the quoting process. They did a good job, kept the house clean, and when the crew came out to perform part of the job they reassessed that part of the job was unnecessary which saved me several hundred dollars. Professional and knowledgeable crew. Would recommend to others.
I highly recommend West County Insulation. From the moment Sean came to my house for the estimate, I knew they were different. He spent so long in my attic I worried that something had happened to him! However, he was taking photos and measurements and doing a thorough analysis of the work that had to be done! Then we sat down and he went over everything. What an amazing thing that was after initial visits from two previous dud companies. One company just left and then I never heard from them again! West County Insulation cleaned out the old, repaired gables and holes, cleaned the area with disinfectant and THEN blew in new insulation. And when the tech found that my air return was split open, he took care of it without notable added expenses. I think they are a company that is a rare mix of quality and integrity. And yes, in case you are wondering, they are very affordable as well! Please call them!
Recent Reviews:
I would just like to highly recommend Oscar and Aaron for all your installation and weatherazation needs. They arrived on time and never stopped working. They installed installation throughout the whole house. And did so much more. I would highly recommend Aaron and Oscar. My wife and I are very pleased with there work. They were very informative about everything they did. I would like to personally thank Affordable Comfort and team for providing excellent service Thank you so much you all were greatly appreciated. THUMBS UP!!!!!!
This place should get no stars I had this company come in my home to do work one of the workers was in my room for 2 days dealing it up he moved my bed a saw I had money under there and took it now I have to call the police to get this situated there trying to say that they didn’t take it but your was the only one in my room please be careful who you let in your house have anyone else had something like this happen
Recent Reviews:
I was greatly satisfied with the services rendered by KOALA. Their employees demonstrated good teamwork and time management. They arrived on time and came well prepared. Each employee was very professional (very polite). All of the work was completed to my expectations - including their good housekeeping skills. All debris was removed inside and out. Surprisingly, the price was very affordable. Moreover, the smiles and gentlemen-like behavior was greatly appreciated.
Very knowledgeable all the way from sales to installation. We had a solar fan installed and immediately made a positive impact on how much we ran the air conditioner. I wish I had known about this years ago. Thank you to everyone at Koala.
Got us filled up to R49 and some insulation rolls. Ryan and team kept me well updated during the process of blowing in the insulation. They took lots of pictures of the attic. I was really happy and would recommend. We had a delay in the initial quote which they said was a new system, but once we got on track everything was great.
Recent Reviews:
Great company to do business with. We have used them twice on two residential units. One was for blown in insualtion, the other was spray foam. The crew arrived early, told us how long it would take, and got to work. They were efficient and cleaned up with no mess and completed the job quickly . Definitely recommend them for any insulation projects.
From the sales rep, Steve, the office staff to Tommy and Jared who blew the fiberglass insulation in to bring the attic to R49 the whole experience was positive. Great communication from a professional efficiently run company. Never called anybody else as it was a fair price with a reputable contractor (also recommended by roofer). Very pleased with the installers. They answered my questions, were on time and friendly. Highly recommend based on my experience. Thank You!
Thrilled with my service with insulation pros! The estimate came in quickly, the price was fair, the work was super professional. The workers did a great job, really quickly, and cleaned up after themselves. Couldn't be more happy or reccomend them highly enough!
These are the questions St. Louis homeowners ask most about spray foam cost, R-value, and open- vs. closed-cell foam — with context for local pricing and roughly 35% typical energy savings. Compare the 4 verified St. Louis contractors above for exact quotes.
Not finding the right fit in St. Louis? Many spray foam contractors travel to nearby towns. These communities within about 60 miles all have verified contractors listed.