Find top-rated spray foam contractors and save up to 37% on energy bills
Compare 16 verified spray foam insulation contractors serving Longmont, Colorado, backed by 842 customer reviews averaging 4.7★. Whether you're insulating a new build, retrofitting an existing home, or upgrading attic and crawl-space insulation, these pre-screened Longmont contractors handle both open-cell and closed-cell spray foam. Homeowners here typically cut energy bills by around 37% — 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 Very Cold.
Recent Reviews:
I haven't actually used their services as of yet But know I will in the future and I'd refer anyone I know to them They seem to be on the level straight shooters and good for what they say as far as I can tell Great guys hard workers very reasonable rates for their industry Good luck guys on your journey!
Great people, good service, excellent communication. i recommended this company
These guys kill always do a great job was pleased with there work !!!!!!! Recommend
Recent Reviews:
Recent Reviews:
I just received attic insulation from Arvada Insulation. I'll save you the time on shopping around, Arvada Insulation was the most competitive quote by far. I was new to the attic insulation process, so I received quotes from several other vendors in the area to get a baseline. More importantly, Phil was very easy to work with. Friendly, honest, and straight to the point. Phil gave me a quote, and maintained the price throughout. Even after making several repairs and modifications to improve the integrity of my attic beyond the insulation. Vic was also nice. He enthusiastically showed me how the fiber glass hopper worked. Phil was careful to keep the work area clean, and the fiber glass insulation was not as dusty or messy as I would have expected. I will be recommending Arvada Insulation to anyone in the area :)
I had a great experience with Phil & Arvada Insulation. One of the bedrooms in our 1959 house was always colder in the Winter and warmer in the Summer. Now that it was a nursery for our baby boy we needed to do something about it. After trying a new vent and cellular shades I decided it was time to try to get the walls insulated, which felt like it would be a daunting (and expensive!) task. I called Phil from Arvada Insulation because I knew he was local to my neighborhood. Phil talked me through his process and my options to blow in insulation into the walls then scheduled a same day estimate. He was right on time for the estimate (though I almost napped through it) and throughly reviewed the room inside and out then provided my options and a hand-written estimate at a shocking reasonable price. I was hesitant about how my exterior brick/mortar would look following the project and Phil went the extra mile by showing me some other properties where he had done similar work and creating a new mortar sample just for me. On the day of the project Phil again showed up on-time, was respectful of my property, and did an extremely professional and thorough job. The best part is that it actually WORKED! My baby’s nursery maintained heat 3-4 degrees better than it had before which is such a huge relief. I highly recommend Phil & Arvada Insulation and will most definitely be calling him for future insulation projects.
After getting a great quote from Arvada Insulation for my attic insulation job, I accepted and got scheduled quickly. It included the sun room which another company had missed. I was impressed with his knowledgeable approach, and how good the results were. Thanks Phil and Vic, I will be recommending you in the future!
Recent Reviews:
We needed spray foam in our garage done. We scheduled an estimate and within a few days we were able to get the work done. Our garage has never felt better! We will definitely be recommending them to our family and friends. Thanks for the great work, JD Insulation!
Couldn’t be happier with the work they did! Was a last minute idea before we finished up the project and they were able to make it out fast and did a great job!
Professional, amigable and knowledgeable staff.
Recent Reviews:
These guys were fantastic. I knew the insulation in my attic was low (around 6–10 inches), so they came out, assessed the situation, and provided a quick, clear estimate. I considered doing it myself, but for just a bit more money (and a lot less time and hassle) it made so much more sense to have them handle it. I'm glad I did. The upstairs temperature has dropped by about 5°+ on 90° days, and now it's roughly the same as downstairs which is huge for my A/C unit and electric bill.
Koala Insulation did a fantastic job upgrading the insulation in our attic and other parts of the house. They identified key areas for improvement, and the project plan earned praise from our home energy advisor. When it was discovered on the day the work was to take place that an issue with construction of our house prevented the project from happening as originally planned (and bid), Koala worked to troubleshoot the issue and provided us with a compromise solution that was fairly priced and still allowed for maximum insulation benefit under the circumstances. The Koala team who did the work were friendly, professional, and great to have around. They finished the job quickly and cleaned up completely afterward. We’re looking forward to greater comfort and energy savings this winter!
Absolutely the best service! A year ago we needed to replace a room of insulation for mice mitigation. Koala helped out. They were very professional, on time, and efficient. We decided to finish a bathroom in the basement. So, I called to see if they could do the same thing a remove and replace the insulation. I talked to Justin, and glad I did. He was immensely helpful. He gave great advice and actually did something most businesses don't these days. He actually said the price to do this would be more expensive to go with them, and walked me through how to do it myself and save hundreds! What business wouldn't just accept the job and make me pay hundreds more without realizing it? Koala Insulation of NoCo we appreciate all of your advice and will continue to recommend your services!
Recent Reviews:
Fantastic crew and service. Professional, fast and friendly. I would highly recommend.
The quality and professional workmanship of this company is great. I would highly recommend them if you are in need of a spray foam insulation in your home, attic or business.
Overall Great service , I definitely recommend , they have been great to us for years now , they are my go to .
Recent Reviews:
Recent Reviews:
Overall my whole experience with the company from start to finish excellent customer service . I would highly recommend my closest friends and family to do the same and call the Apex team for all the services they might need. Thanks again and keep up the Great Work...
This company does excellent work, they are very hard working and got the job done. Very professional and respectful. I recommend for good quality work.
Company has integrity and professionalism. As seem in photos job well done!
Recent Reviews:
Koala Insulation of Boulder: I contacted Chris White from Koala Insulation of Boulder in late November and he was able to get me scheduled before the holidays. His spray technician Bernie and assistant Brandon showed up promptly on the morning of installation. They were both very professional, polite and friendly. I was communicated to exceedingly well, and knew from start to finish what was happening. Care in clean up was also done well. My back office and garage attic now feel much warmer and quieter and these efficiency improvements will add value to my home. I can now do some final wiring and finish work with confidence. I am quite pleased with the results and would recommend Koala Insulation to anyone. Money well spent! Mark W
UPDATE: It's been over a month now and I'm so happy I did this! I used to know how cold it was outside the second I put my feet on my bedroom floor, but now I have no idea because it's toasty warm! Thanks again guys! - - - I'm a hard guy to impress, but impress me they did! Devin was thorough when we went over my needs, and he was great with communication and getting me an estimate quickly. The price for the foam insulation job was very reasonable (I'd looked previously and had sky high estimates). The Job. My house has numerous rooms with cantilevers that overhang the level below, and they were poorly insulated in the late 70's. The floor over these cantilever areas was freezing all winter long! I had enough, time to fix it properly! Bernie was the specialist that was sent to do my job and he was great! He and his assistant were extremely courteous, professional and clean! They went above and beyond when hearing what was most important to me, and did an outstanding job! They were fast, polite and made a big effort to work cleanly. I'm extremely happy with the job that Koala Insulation of Boulder did, and will definitely call them back for the other insulation projects that my older house needs. Bring on the cold! Thanks guys! - Craig
Amazing service, the team was very quick, got us in earlier than expected and was in and out quickly. They added more insulation than I expected and left our house very clean. We opted for the solar fan and added a few soffits. Man was that the right move. After adding central air to our house we noticed the upstairs would not cool down when sun was shinning on house but after this service it is night and day difference. Our AC isn’t running all day, we are cool and saving tons of $$
Recent Reviews:
My parents recently hired "The Insulation Guy" to install insulation in their home, and we couldn’t be more impressed with the service. From the initial consultation to the final installation, the owner was professional, knowledgeable, and efficient. He took the time to explain the different insulation options, helping my parents make an informed decision based on their needs. The installation process was smooth, and he ensured that everything was done right. Since the job was completed, we've noticed a significant improvement in the comfort of their home, with more consistent temperatures and lower energy bills. I highly recommend The Insulation Guy for anyone in need of top-notch insulation services!
Chuck is excellent to work with on your insulation project. He addresses every possible cause of an insulation issue and goes out of his way to address them. He is very honest and kind. I highly recommend him!
I’ve used Chuck and his crew at The Insulation Guys several times now, and they’re always amazing! Chuck’s expertise is top-notch, and his crew works tirelessly to get everything just right. They’re friendly, trustworthy, and always make sure I’m in the loop. I wouldn’t trust anyone else with my home
Recent Reviews:
Everyone at Ascend was incredibly warm, helpful, and professional. They did an excellent job with my installation, and were communicative at every step. Further, they helped explain how to apply for a rebate from my energy company and walked me through the tax implications in a clear way that made everything go smoothly. I cannot recommend them enough!
This company did a crawl space encapsulation and radon mitigation system for me. They were wonderful. Great guys, on time, left the place cleaner than it was. Highly recommend!
Connected with Ascend through the Fort Collins energy rebate program. Talked with Lizzy on the phone and Chris came out for the estimate. Super easy to work with and great communication all around. We decided to have our attic sealed (spray foamed) and new blown-in insulation installed. When it came time to do the work, Pete and crew were all very polite, professional and kept our home clean during the process. Again, communication was outstanding. Never was I wondering where we were at in the process or what was happening next. Work was completed on time with no outstanding issues. Highly recommend and will use them again for future projects.
Recent Reviews:
I had a great experience. Very professional and courteous. Got a hold of me in timely manner. Highly recommend.
They are a reputable company that does what they say they will do. I appreciated the line of communication they kept. Highly recommended.
Communication was great, answered all my questions and they were on time. I recommend this Company. 👍
Recent Reviews:
I've hired Cole and his team twice to insulate some less than typical structures. The first time was a shipping container house, the second for a school bus camper conversions. In both cases I was blown away with the results. Cole and his team have exceptional customer service and a high attention to detail. After seeing the work of some other installers, I won't be hiring anyone but PolarPak for any future projects.
With the usual trepidation one experiences when hiring a contractor, it is always a pleasure to encounter a company that exhibits knowledge, professionalism, and a desire to make their customer happy. This, PolarPak did from start to finish. Cole (owner) and Loren showed up, on time, to fix the cause of mold on the interior of my exterior walls. Typical fiberglass insulation creates a barrier, allowing condensation to occur whenever freezing outside temperatures meets inside home temps, with the end result -mold. They covered everything, including the floor, before they started. Then, carefully viewing the job before them (I had just installed a fire block which created a challenge), they sprayed foam everywhere it was needed, plus a few extra areas that I asked them to take care of. They did all this with a smile. I highly recommend PolarPak for your home insulation needs. And besides mold remediation, their process stops insect infiltration and drafts. Very nice.
Cole and his team did a great job insulating my A-Frame style garage building. It was a challenging job, and they nailed it. It makes a huge difference. The building is now comfortable, regardless of the temperature outside.
Recent Reviews:
These guys absolutely exceeded my expectations!
Quick, clean and efficient with incredibly fair pricing!
Came on time, worked hard and cleaned when they left. This is our second time using them. First for the basement and now the attic. I would recommend this company to anyone.
Recent Reviews:
Great Staff. Great service and quality of work.
I hired RG Insulation to install baffles and blow additional insulation in my attic. Everyone I dealt with from the salesman who quoted me the price to the two gentlemen who performed the work were very professional. They took care to protect my floors and prevent mess. They did an excellent job in a short period of time and then made sure I pleased with their work. Plus, their price was excellent as compared to competitors. Highly recommend!
Great staff
Recent Reviews:
We obtained in-home quotes from several insulation companies to upgrade our home insulation, air seal, and install a whole house fan. After narrowing it down to 2 possible contractors, we chose Timberline Insulation. We were VERY happy with our choice. Reed's in-home inspection was very informative and we found him to be very friendly, knowledgeable, and easy to work with throughout the process. Their quote was more competitive than the others. He and his 3 man crew were very efficient, tidy, and organized. They completed the extensive job in 1.5 days and were very conscious to leave the area very clean at the end of each day. I give them my HIGHEST recommendation.
Timberline Insulation was great to work with. John answered all of our questions, provided us with a fair quote, and got us scheduled within a very reasonable timeframe. We are extremely happy with the results and can tell a significant difference from the work performed. The installation crew was very professional and efficient. We highly recommend this company.
EXTREMELY PROFESSIONAL!!! John and his crew were/are very knowledgeable and simply did great work. They were very good at explaining the details of insulating a new house, as well as even educating me on other code issues. If you want a good job done, go with Timberline. None finer!!
These are the questions Longmont homeowners ask most about spray foam cost, R-value, and open- vs. closed-cell foam — with context for local pricing and roughly 37% typical energy savings. Compare the 16 verified Longmont contractors above for exact quotes.
Not finding the right fit in Longmont? Many spray foam contractors travel to nearby towns. These communities within about 60 miles all have verified contractors listed.