Spray Foam Insulation in St. Louis, MO

Find top-rated spray foam contractors and save up to 35% on energy bills

💰 Estimated Energy Savings in St. Louis

35%
Average Energy Savings
Typical range: 30% - 40%
$1,596
Estimated Annual Savings
Based on $380/month average energy cost
4 years
Average Payback Period
Return on investment timeline

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.

Verified Contractors in St. Louis

Foam Engineers - Insulation Experts

Direct: 3143780339

5
6 Google reviews

Recent Reviews:

Christiane Remorin★★★★★a month ago

Mindy, came and explained the process… The guys who installed were fast and left no cellulose mess behind… the price was affordable! Can’t be happier with Foam Engineers and their staff.. referred them to my neighbor who’s getting her attic done too!

Kellee Wright★★★★★3 weeks ago

Foam Engineers has exceeded my expectations. I’m a project manager for a home renovation company and have worked with Foam Engineers on my last two projects. Their pricing is very competitive, and their service is outstanding. Dave and his crew installed both spray foam and batt insulation on my most recent project. They were prompt, professional, and maintained excellent communication throughout the process. They went above and beyond in both scope and execution. I’ll continue to use Foam Engineers for future projects and have already recommended them to my colleagues.

Leslie Morton★★★★★3 months ago

Very impressed from start to finish with Foam Engineers! Mindy came out for the estimate and was extremely thorough in explaining the process of installing cellulose insulation and the resulting benefits. The estimate was very detailed, including photos.The installation took place yesterday and we had a fabulous crew! Alex was the lead and impressed me with his knowledge and professionalism. Colin, Dylan, and Tony were all very competent and skilled workers as well. All were committed to the successful completion of the project in a timely manner. I had to run an errand and felt comfortable leaving the guys on their own. Mindy dropped by during the installation. Her attentiveness and follow-up were very much appreciated. I wouldn't look further than Foam Engineers for your insulation needs. Bravo to Mindy and the crew of four - thank you for a job well done!

Premier Foam Insulation, LLC

Specialist

Direct: 5732862411

5
4 Google reviews

Recent Reviews:

justin teter★★★★★8 months ago

Hands down the best insulation in the business!!! Drew was EXTREMELY knowledgeable about all possible products that I could use on my home. He and I went over all options with the pros and cons of each. I am super picky to say the least, so I check everything very closely.They spray foamed the exterior walls and blew in cellulose in the attic. I was impressed with the attention to detail. Not one single area that didn't have the correct amount of insulation or foam extruding past the 2x6’s on the exterior walls. When they left, the job sight was as clean, if not cleaner, than when they arrived. And to end the already great experience, my bill was cheaper than we had discussed. Premier Foam is second to none, 10 out 10, and I will never use anyone else!!!

Chris Nelson★★★★★7 months ago

Timely, conscientious, honored their bid and was concerned with our satisfaction. That’ll work!

kara cook★★★★★8 months ago

Premier Foam is my go to for all my insulation needs! Very professional, clean and friendly!

Missouri Spray Foam Insulation

🏆Certified Pro

Direct: 6362428813

5
24 Google reviews

Recent Reviews:

Moony Williams★★★★★7 months ago

While I haven't used Missouri Spray Foam Insulation myself, I've had the opportunity to interact with their team and was thoroughly impressed by their professionalism and depth of knowledge. They were incredibly helpful and took the time to explain the benefits of spray foam insulation in a way that was easy to understand. Their dedication to providing top-notch service is evident, and I have no doubt they deliver fantastic results. I'm looking forward to potentially working with them in the future and would confidently recommend them to anyone considering spray foam insulation.

Tanya Easley Sena★★★★★4 months ago

Missouri spray foam insulation seems to be very professional. Great information is provided on their website . Great all the way around I would definitely give them a try

Sadie★★★★★5 months ago

They had the upmost professionalism I am happy I use this company for my basement they did a fantastic job and will use them again in the future!!!😊

iFOAM Insulation of O'Fallon

🏆Certified Pro

Direct: 6363393957

5
98 Google reviews

Recent Reviews:

Jeffrey Olander★★★★★2 months ago

I have been struggling with keeping house cool during the summers and warm during the winters. Made a request to iFoam for an evaluation and was promptly contacted and had the evaluation done within a day! Bryan explained everything clearly with his recommendation. Signed everything that same day and just had them at house to complete the job. Can't wait to see the impact that it has to keep house warmer and savings over the next few months. Only thing I wished could have been done was having this done sooner!

James Kerker★★★★★2 months ago

Scott,Brian and Justin are great people to work with . Very professional and friendly. Pricing for their work is reasonable. They stay in contact with you throughout the process. I highly recommend this company for you insulation needs.

Jeff Thompson★★★★★2 months ago

I-foam did a great job on my shop! The fellas that showed up were professional and were done in no time. I will definitely be using them for future projects.

Bi-State Insulation, Inc.

Direct: 3143535400

5
3 Google reviews

Recent Reviews:

matt moriarty★★★★★9 years ago

I am totally rad and this is where i hang out

Tom Raymond★★★★★4 years ago

T Dooner Dooner★★★★★7 years ago

Goley, Inc.

Direct: 6182863355

5
7 Google reviews

Recent Reviews:

Peggy Kraus★★★★★3 months ago

We were very happy with Goley for insulation in our home. Stephen and his team were very efficient, cleaned up any messes if there were any. They were in and out in a timely manner. We’re very pleased with how everything turned out. We even referred our neighbor!

T.J. Siebenman★★★★★a month ago

We had a great experience from start to finish with the team from Goley. We were thrilled with their attention to detail and communication. They cleaned up as if they were never there. The layers of blown insulation looks amazing. We would definitely recommend them to anyone.

Carla Green★★★★★a month ago

The entire process was seamless! I had a quote the same day, service date was scheduled within 2 weeks, the crew showed up as promised, before and after pictures were shared, zero cleanup for me and I received follow up communication the next morning for any questions, concerns or complaints I may have had. I highly recommend Goley! Very professional company! Thank you for making me a happy customer!

Aladdin Insulation of Missouri

Direct: 6369478000

5
5 Google reviews

Recent Reviews:

Kyle Traum★★★★★2 weeks ago

Was great working with Jason on getting a quote and quick install on the books. The two installers, I’m terrible with names, were very professional and did great work. Couldn’t be happier with my overall experience. Highly recommend.

Matt Wieland★★★★★8 months ago

This is the third home I've had done by Aladdin and it was wonderful as usual. They put an additional amount of insulation in the attic and brought it to r49. They added insulation to the garage. They also spray close cell phone insulation on the sill plate in the basement in my house I can already tell seems to be warmer. Another wonderful job!

Lanelle Schultz★★★★★a year ago

This is a trucker review: Super nice people! I arrived during the night. Gentleman knocked on my door and said "as soon as you're ready I can get you unloaded". It's a small area but they left spots open so it's easy to maneuver. Offered me coffee, bathroom, water, or if I needed anything else. Hope I get to deliver here again.

Foam Co.

Direct: 3144630888

5
7 Google reviews

Recent Reviews:

Terry Garrabrant★★★★★6 months ago

I cannot say how great these people are. It was a last minute Schedule to get done They were able to work around the last Minute request. I had to get my sighting replace. I've been waiting for a year and they finally said we're here to do it, so that was the perfect time when everything was off to get it insulated. Thank you so much for the hard work.I noticed it as soon as I get Home.The back bedroom was 5 to 10 degrees cooler

Jesse Nobbe★★★★★2 weeks ago

Foam Co. was very easy to work with. We had new insulation blown and sprayed in. They were able to get it done in a day and went above and beyond providing pictures of the install and working independently. They communicated promptly and clearly throughout the process.

James Lee★★★★★2 months ago

Very professional company from the beginning of the project to it's completion. Every person was nice and respectful. When they say the workers will start at 7am that is what they ment. They blew in our new insulation. They came right in, introduced themselves and got to work. The project did not take long at all and they cleaned up behind themselves. The price for the job was nice too. If we need any more work done we will be calling them again . James and Brenda Lee

St. Louis Insulation of Metro East Illinois

Direct: 3143340153

5
5 Google reviews

Recent Reviews:

Miles Kofron★★★★★2 years ago

We've had St. Louis insulation out to our house now twice to help us with sealing off unneeded vents and also adding better quality insulation material. We couldn't be happier with the quality of the work and also how fast they were!

N C★★★★★2 years ago

Michael came to our house to quote our attic insulation situation. He explained different improvements we could take and explained the current situation up there in a way that made sense. His quote was very competitive and his scheduling was even more competitive. They installed without any issues. If you want a knowledgeable professional to look at your attic with a hard working, small company team, this is the one for you.

Amber Williams★★★★★5 years ago

Zachary did an amazing job my husband and I are very happy with the outcome and we would strongly recommend him to anyone. Always on time, always was there to answer any of our questions. The prices are very affordable and he was in and out with a quickness which is something I personally like. There was no delays or unexpected issues. If u need work done Zack would be the one to call for sure! Thanks again

West County Insulation

Direct: 3148664208

4.9
123 Google reviews

Recent Reviews:

Chris Carr★★★★★4 months ago

Read the Google Reviews and decided to approach West County Insulation for my historic home re-insulation after water and mold damage. They did a phenomenal job talking options with me for eco-friendly and something that would allow the home to breath appropriately. Could not beat the price and level of service and professionalism. Used them for cellulose batting and blow-in for the attic spaces beyond the bedroom walls. Cannot recommend them enough.

Sahar Joakim★★★★★2 months ago

I am so glad I contacted West County Insulation for a second opinion. Brandon S had great communication, so friendly (but not tooo friendly). Super professional, intelligent. Was he a sales person? Felt like he was just there to take photos and explain how to make my attic insulation more effective. I'm hiring the company to redo my insulation (just had to come on here and rave about the sales rep!) I'll update the review if the labor is not fittingly excellent

Caitlind Walker★★★★★2 months ago

West County insulation did an incredible job with removing and replacing our attic insulation! They quickly got us competitive a quote and Brandon was excellent explaining the process and working with us to reschedule installation when our electrical work took longer than expected. David and Isaac performed the insulation removal and installation: both were kind, informative, and left the area around our attic and stairs cleaner than when they came! Highly recommend this company for any insulation needs.

Koala Insulation of Gateway West & Metro East IL

Direct: 3147565661

4.9
506 Google reviews

Recent Reviews:

Faith Missler★★★★★2 weeks ago

My husband and I had a great experience with Koala Insulation. They showed up on time for our appointment, charged us a great price, and were in and out in about an hour for the actual service. They even cleaned up like they were never there! Wish all businesses were so easy to work with. Highly recommend!

David Binaei★★★★★a week ago

its always great when someone does such a stellar job and everything goes smoothly, definitely a big relief. Brianna was amazing through out whole insulation press she really made it difference when everything streamlined and well coordinated. great company wonderful staff.

Bill A★★★★★a month ago

Koala give a free assessment. In the quoting process they go over every aspect of the attic space and what it needs and nice to haves. They gave me a few different options in the quote to best suite my budget and what I wanted. The work was done about a week ago at time of this review. I think it will be hard to quantify the effect right of way adding insulation to the attic, but it is supposed to help keep hot air out of the house in the summer and keeping the heat in in the winter. I am pleased with how professional both the quoting person and the install crew were.

St Louis Insulation

Direct: 3143340153

4.9
35 Google reviews

Recent Reviews:

jon deak★★★★★a year ago

I dont even know where to start here! Chris took a bunch of time on a sunday while he was with his family to talk to us about our issues, what we needed and took the time to really explain everything and educate us about insulation, and he did all of this within ONE HOUR of me reaching out to get a quote. Chris told us what we needed, gave us such a good price and then guaranteed his work and our happiness and he wasnt lying! I just got home from work and checked my attic and they did such a great job on blowing in additional insulation for us since the home builders couldnt get it right not once or twice, they came out and got us right within 2 hours. Im so glad we used st louis insulation and we will continue to do any business that we need with them and will reccomend them to anyone needing insulation, i cant explain how wonderful this entire experience with them was and his prices are extremely competitive. Thank you so much chris and your entire team!!

David Eckell★★★★★a year ago

I had a great experience with St Louis Insulation. The quote process was quick and the price was very reasonable. Everything is done through their portal, so chatting, quotes and payment are easy. The day of the install was just as good. Brandon and his crew were fast and gave me pictures showing the quality of the work. They cleaned up and were very polite. I was impressed. They also showed up a little early!

Eric Farson★★★★★2 years ago

Great experience. They were super friendly and not only gave me a quick bid for adding insulation in my attic but also gave me a few other tips for making my basement more energy efficient. I appreciated the overall process including approving the bid and the installation date via a link sent via text. This was much easier than calling back and forth. The installers were also friendly and efficient. The price was very reasonable and well worth it.

Koala Insulation of St. Louis

Direct: 3142795064

4.9
10 Google reviews

Recent Reviews:

Stephanie Molnar★★★★★a week ago

We had a great experience with Koala Insulation from start to finish! They removed our old insulation that was damaged from the tornado and blew in new insulation, and the entire process was smooth and professional. The crew was efficient, respectful of our home, and did an excellent job cleaning up afterward. Nick H. was especially wonderful to work with. He walked us through every step, answered all of our questions, and made sure we felt confident and informed throughout the whole process. His communication and customer service really stood out. We’re very happy with the results and would absolutely recommend Koala Insulation to anyone looking for quality work and great service!

Tina Wright★★★★★2 weeks ago

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.

Tim Wolfe★★★★★2 weeks ago

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.

Foam Products Corporation

Direct: 3147398100

4.8
5 Google reviews

Recent Reviews:

Laura Ockel★★★★★6 years ago

Foam Products offers recycling for styrofoam packing materials and coolers, which is a much-needed service here in St. Louis. They make it so easy, you can drop off your recyclables in their convenient bins 24 hours a day. The bins are located around the side of the building. They do not accept styrofoam peanuts or food containers.

Michael O'Dea★★★★★4 years ago

Great service. They thought outside the box and helped a local nursing home find a safer solution. Go team!

Julio Viskovich★★★★★a year ago

Really great group of people at FPC! Had a chance to talk business with Brian, and he is a very knowledgeable, helpful and friendly person. I wouldn't hesitate for a second if you're in the market for any custom foam products!

Capital Foam Systems

Direct: 6362945205

4.8
68 Google reviews

Recent Reviews:

Mike Holloway★★★★★6 months ago

Salesman was upfront and likable. Installers did a top notch job. All promises kept.

Adam Thrower★★★★★a week ago

Corey came out to give us a bid, and gave us a great price to closed cell spray foam our pole barn. We were very picky compared to most customers due to our foam being the finished product inside the building. Corey sent out Shawn to finish out a few punch list items, and we are very happy. There are a lot of contractors that will ghost you when small things need to be fixed. That is not Capital Foam. Corey stood behind his product, and in the end made it to where we were 100 percent satisfied with the finished product. Highly recommend. Great pricing, quality, and they stand behind their work.

Tom DeClue★★★★★6 months ago

they sprayed the entire outside of my old farm house! excellent work. worked with me on schedule. Shawn is great guy!

U.S. Spray Foam Rentals

Specialist

Direct: 6363991569

4.2
5 Google reviews

Recent Reviews:

Ryan Bunch★★★★★3 years ago

Corey with US Spray Foam Rentals was great to work with. I did 3” of closed cell foam on the exterior walls of my house build. Saved some money by using their services. I will plan to use them again in the future and would definitely recommend them to anyone considering spray foam.

Cliff Watson★★★★★6 years ago

I just had the pleasure of working with Corey from US spray foam rentals. He was extremely professional, on time, knowledgeable, and their equipment was superb. I sprayed a 5000 s.f shop for 1/2 the price of using a contractor and the closed cell foam not only insulates but adds structure and rigidity to your building. If you don’t mind getting your hands dirty and like saving money then I wholeheartedly, absolutely recommend U.S. spray foam rentals.

Garrett C★★★★★7 years ago

U.S. Spray Foam Rentals is an excellent company to work with! I sprayed my building and saved a small fortune doing it. They did everything the said they would from start to finish. I would recommend this company to anyone looking to save on their foam project!

Frequently Asked Questions — Spray Foam Insulation in St. Louis

How much can spray foam insulation save on heating and cooling bills in St. Louis?
Homeowners in mixed climates like St. Louis, MO typically see 20–30% reductions in total energy costs after spray foam installation. The savings come from both reduced heating in winter and reduced cooling in summer. The exact savings depend on your home's current insulation, size, and local energy rates, but most homeowners recoup the investment within 3–6 years.
Is spray foam better than fiberglass insulation for homes in St. Louis?
For most homes in St. Louis, MO, spray foam outperforms fiberglass significantly. Fiberglass batts insulate but do not air seal — meaning conditioned air still escapes through gaps. Spray foam both insulates and creates an airtight seal, addressing the root cause of energy loss. While spray foam costs more upfront, the performance difference in mixed climates makes it the better long-term investment for most homeowners.
Is spray foam insulation worth the cost?
For most homeowners, yes. Spray foam creates an air-tight seal that traditional insulation cannot match, reducing energy bills by 15–35% annually. It also adds structural rigidity, acts as a moisture and vapor barrier, reduces outside noise, and can increase home resale value. The higher upfront cost compared to fiberglass is typically recovered within 3–7 years. One important note: because spray foam creates a very tight building envelope, proper mechanical ventilation is important to maintain healthy indoor air quality and prevent interior moisture buildup. This is typically handled by an Energy Recovery Ventilator (ERV) — a system that brings fresh outside air in while pushing stale air out, recovering the energy from the outgoing air so you don't waste what you paid to heat or cool — or a Heat Recovery Ventilator (HRV), which works similarly but is optimized for cold climates. A qualified contractor will assess whether your home needs ventilation upgrades as part of the installation.
How much does spray foam insulation cost?
Spray foam insulation typically costs $1.00–$3.00 per square foot installed, depending on the type and your location. Open-cell foam runs $0.44–$0.65 per board foot, while closed-cell foam costs $1.00–$2.00 per board foot. A typical 2,000 sq ft home attic costs $2,000–$6,000. Most homeowners recoup this investment within 3–7 years through energy savings of 15–35% annually.
What is the difference between open-cell and closed-cell spray foam?
Open-cell spray foam is softer, less dense, and less expensive. It expands significantly and is ideal for interior walls, attics, and soundproofing. Closed-cell spray foam is denser, stronger, and provides a moisture barrier — making it better for exterior applications, crawl spaces, and areas prone to flooding or humidity. Closed-cell also has a higher R-value per inch (R-6 to R-7 vs R-3.5 to R-4 for open-cell). One key difference: open-cell foam allows some vapor movement, while closed-cell acts as a vapor barrier — an important consideration for your home's ventilation needs.
How long does spray foam insulation last?
Spray foam insulation is one of the most durable insulation options available, with a lifespan of 80+ years when properly installed. Unlike fiberglass batting which can sag and settle over time, spray foam maintains its shape and insulating properties indefinitely. It will typically outlast the building it is installed in.
How do I find a qualified spray foam insulation contractor?
Look for contractors who are licensed, insured, and have verifiable reviews. Spray foam requires specialized equipment and training — improper installation can cause off-gassing, adhesion failure, or fire hazards. Ask for references, verify their insurance, and get at least 2–3 quotes. A qualified contractor will also assess your home's ventilation needs — a tightly sealed spray foam installation requires adequate mechanical ventilation to prevent moisture and indoor air quality issues. FoamMatch pre-screens all listed contractors for licensing and insurance so you can compare verified professionals in your area.
How long does spray foam installation take?
Most residential spray foam jobs take 1–2 days depending on the size of the area. A standard attic takes 4–8 hours. After spraying, the foam cures within 24 hours, though most contractors recommend waiting 24–72 hours before occupying the space due to off-gassing during the curing process.
Does spray foam insulation need to be replaced?
No — spray foam insulation does not need to be replaced under normal circumstances. Unlike fiberglass insulation which degrades over time, spray foam maintains its R-value and air sealing properties for the life of the building. The only reasons to remove or replace spray foam are water damage, renovation work, or improper original installation.