4.6 
208 *The Angi rating for Insulation Service companies in Longmont, CO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Insulation Service needs.
*The HomeAdvisor rating for Insulation Service companies in Longmont, CO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Insulation Service needs.
Last update on March 27, 2025
Serving Longmont, CO and surrounding areas
Approved
In business since 1993
Free estimates
Credit card accepted
"Minimal clean up do after the job was done. Denver Insulation is using the very top grade foam glass insulation to perform the work"
+10
Serving Longmont, CO and surrounding areas
Approved
In business since 2020
Free estimates
Warranties offered
"Alvin and Jose did a wonderful job for us. They are conscientious and skilled and I would recommend this company to everyone needing insulation."
+25
Serving Longmont, CO and surrounding areas
Approved
Super Service Award Winner
In business since 2021
Free estimates
Offers commercial services
"RL Insulation LLC has been an incredible partner on several commercial projects for my company. Their team is reliable, efficient, and consistently delivers high-quality work. They complete projects quickly without sacrificing attention to detail, and their professionalism makes them a pleasure to work with. If you're looking for an insulation company that gets the job done right the first time, I highly recommend RL Insulation LLC!"
+2
Serving Longmont, CO and surrounding areas
Approved
In business since 2001
Free estimates
Customers say: Quick response
"Dave and his crew did great with our garage insulation. I would hire them again"
Serving Longmont, CO and surrounding areas
Approved
In business since 1976
Free estimates
Emergency services offered
Home Pro of the Year in 2010 (Service Magic)Home Performance Contractor of the Year for the last 8 out of 10 years. We are a company that specializes in re-insulating existing homes by using blown-in insulation and getting huge reductions on our customers energy bills by Air Sealing and compressing fiberglass or rockwool in the walls and Dense packing it tight.Where most companies are happy getting 10%energy reductions on their clients homes, we want 50% or higher. Our family has owned and operated Bestway Insulation, LLC, in Colorado since 1976. Born & raised CO. Top Rebate producer for air sealing in 2009 - 2021. Home Performance with energy star Contractor of the year 21 out of 23 Years starting with NREL when they were doing it in 1996. I want huge results for my clients.
Serving Longmont, CO and surrounding areas
Approved
Super Service Award Winner
In business since 2020
Free estimates
Offers commercial services
"Trust Us Insulation has great service. On-time, clean, and very professional. Insulation has only been installed a few weeks but I can feel a difference also on my energy bill, Thanks once again!"
+10
Serving Longmont, CO and surrounding areas
Approved
In business since 2021
Free estimates
Offers commercial services
"Alvin is a very good worker and takes pride in his work. The spray foam work is amazing and I definitely recommend it. I had insulation done as well and had no complaints. Everything from business to work is great with DINO insulation."
+15
Serving Longmont, CO and surrounding areas
Approved
Super Service Award Winner
In business since 2024
Free estimates
Small jobs welcome
"Empower Insulation did a fantastic job installing insulation at my house. They were professional, efficient, and made sure everything was done right. I really appreciated their attention to detail and how clean they left the space afterward. Highly recommend them if you’re looking for quality insulation work!"
+11
Serving Longmont, CO and surrounding areas
Approved
In business since 2019
Free estimates
Credit card accepted
"Prompt, clean, courteous and a job well done. The two brothers do good work. I would use them again if I had insulation related home projects."
Serving Longmont, CO and surrounding areas
Approved
Super Service Award Winner
In business since 2014
Free estimates
Emergency services offered
"Insulation station did a tremendous job putting insulation in my attic it has made a tremendous improvement in keeping my home warm money well spent"
+20
From average costs to expert advice, get all the answers you need to get your job done.
Insulating your attic can improve your home’s efficiency and reduce electric bills. Use this guide to find out what attic insulation will cost you in Denver, CO.
New insulation makes your home more comfortable and boosts energy efficiency. Use this guide to budget for insulation installation costs in Denver, CO.
The cost of blown-in insulation in Denver, CO varies depending on the type of insulation, labor, prep work, and more. Learn more about the cost factors in this guide.
What is insulation? This behind-the-scenes home fixture will maintain comfortable temperatures in your home no matter the season. It’ll lower energy bills, to boot.
Use this DIY checklist for insulation repair to make your living space more comfortable and reduce your heating and cooling bills in the process.
There are 10 types of insulation you can use for your home. Read this guide to discover which insulation types could be best for the job.
