4.6 
24 *The Angi rating for Insulation Service companies in Ottawa, IL 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 Ottawa, IL 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 July 16, 2026
Serving Ottawa, IL and surrounding areas
Approved
In business since 1975
Free estimates
Offers commercial services
"Slagel insulation provided the work that was asked of them. I would hire them back."
+13
Serving Ottawa, IL and surrounding areas
Approved
In business since 2000
Free estimates
Customers say: True professional
"Highly recommend Neil. When we first met he arrived as a worker not a guy in a suit. He arrived when he said he would, he kept me advised of his work. He and his crew re-insulated the underside of my rental module home. He had only a crawl space to work in and I know it was very dirty work. When he found an additional problem he talked to me about it. The estimate he gave for the job was very fair. He is currently working on another estimate for repairing my deck and replacing a sliding glass door. If I could give him 10 stars I would. I am not related to him and never met him until he showed up to work up the estimate. If you need a job done Neil is your guy!!!"
+8
Serving Ottawa, IL and surrounding areas
Approved
In business since 2004
Free estimates
Emergency services offered
"Devan, Lauren and Brendan were my main points of contact with Home Genius Exteriors and they showed professionalism and personality throughout the whole process. Both Brendan and Devan spent time taking to me, even after our business was concluded, this was an exceptional experience and I highly recommend Home Genius Exteriors and all their employees."
Serving Ottawa, IL and surrounding areas
In business since 1948
Emergency services offered
Credit card accepted
"Home Comfort Insulation employee's were very courteous and got the job done in a very expeditious timeframe. I highly recommend using them for any of your insulation needs. You won't be disappointed."
Serving Ottawa, IL and surrounding areas
In business since 1948
Free estimates
Emergency services offered
"Everything was fine until I got the final bill. The estimate they gave was different and the final bill was different. They had put extra charges. When I called them about it, they didn't back down. They also said that because of the extra insulation they used they did they couldn't reduce the cost. Other than that, the job was done fine. At one point, the insulation had blown in, they had a little problem, but that was worked out."
Serving Ottawa, IL and surrounding areas
In business since 2000
Emergency services offered
Warranties offered
"Neil did the job fantastically and explained what he was doing throughout, always asked for an inspection to make sure it was done to my satisfaction. Pricing was extremely fair and he was timely and quick. Would highly recommend for any insulation work you need done. Can’t speak on the other work he does, but if it’s on par with what he did for me, then you’d be doing well."
+11
Serving Ottawa, IL and surrounding areas
In business since 2019
Free estimates
Credit card accepted
"USA Insulation did a excellent job in insulation the whole house. Great crew that really worked well together. We will recommend this company to family and friends. Home is warmer and outside noise is a lot less."
+2
Serving Ottawa, IL and surrounding areas
In business since 2025
Free estimates
Emergency services offered
"This company is fantastic, highly recommended"
+4
Serving Ottawa, IL and surrounding areas
In business since 1978
"these guys are great,they do what they promise,they are efficient and the quote was right on.you wont be sorry if you choose them."
Serving Ottawa, IL and surrounding areas
In business since 2017
Free estimates
Small jobs welcome
We are a local family owned and operated Insulation company. We service North Riverside area and the surrounding communities. With over 10 years of experience, let us ensure your home is properly insulated and save money on your energy every month. You can thank us after for all the money we are going to save you on energy costs.\n
From average costs to expert advice, get all the answers you need to get your job done.
New insulation can make your home more comfortable and boost energy efficiency. Use this insulation cost guide to get an accurate estimate for the installation.
Insulating your attic can massively improve your home’s efficiency and reduce electric bills. Use this guide to find out what attic insulation will cost you.
Your home's ceiling insulation cost will depend on several factors, including the project size, the type of insulation you use, and the R-value.
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.
