4.4 
64 *The Angi rating for Insulation Service companies in Cos Cob, CT 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 Cos Cob, CT 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 December 08, 2025
Serving Cos Cob, CT and surrounding areas
Approved
In business since 2009
Free estimates
Warranties offered
"the insulation they recommended saved me about 5000kw a year. the amount of money i am saving is far more the insulation payment on my Eversource bill. No money cost to me out of pocket and my electric bill dropped quite a bit. best move i ever did."
+1
Serving Cos Cob, CT and surrounding areas
Approved
In business since 2009
Free estimates
Credit card accepted
"Easy company to work with. In our large crawl space a few spots were missed. One call and the crew was back in 2 days to do touch up. Note that this was difficult work-lying on your back spraying above you with respiratory & eye protection so to miss a few spots might be expected as well as how insulation expands. They did great job removing old batt insulation Filled w mouse poop"
+15
Serving Cos Cob, CT and surrounding areas
Approved
In business since 1981
Free estimates
Credit card accepted
"Stu and his team are amazing! Professional, neat, and honest. You could not find a better person for the job anywhere. I stomgly reccommend Stu and Discount Insulation."
+6
Serving Cos Cob, CT and surrounding areas
Approved
In business since 2015
Free estimates
Warranties offered
"Great Experience from inspection to install. On time, clean, organized and completed job better than expected. Would and will recommend to anyone looking for insulation."
+21
Serving Cos Cob, CT and surrounding areas
Approved
In business since 2018
Free estimates
Emergency services offered
"Small family business. Pleasant C.S.and scheduling experience with back office. Partners were very accommodating and their workers were friendly, neat and completed the full attic 50 year old insulation removal and new batt insulation install in a timely manner."
+5
Serving Cos Cob, CT and surrounding areas
Approved
In business since 2015
Free estimates
Small jobs welcome
"I had my attic insulated by EcoFoam and I?m honestly really happy with how it came out. The crew was on time, clean, and explained everything before they started. The attic looks great now and the house already feels warmer with no drafts. Sevi was easy to work with and kept me updated the whole time. Overall the job was done right and I?d definitely recommend them to anyone who needs insulation."
+29
Serving Cos Cob, CT and surrounding areas
Approved
In business since 2018
Free estimates
Credit card accepted
"Joe and his team were extremely knowledgeable - he thoughtfully explained our options and walked me through the benefits of each. Would recommend Koala for your insulation needs."
+3
Serving Cos Cob, CT and surrounding areas
Approved
In business since 2015
Free estimates
Emergency services offered
"Arrived on time. Spent 2 1/2 hours doing preparation to protect our home prior to start to spray foam. Quality of the insulation installation is top notch. Very professional and respectful. I could not be happier with the final project!"
+26
Serving Cos Cob, CT and surrounding areas
Approved
In business since 2004
Free estimates
Emergency services offered
"Window & roof insulation quick, easy, & affordable!"
Serving Cos Cob, CT and surrounding areas
Approved
In business since 2001
Free estimates
Credit card accepted
"I liked that the first questions we were asked was "Have you had a home energy audit done? Did you know you can get a rebate on your insulation project?" Before even knowing the scope of our project, they were looking to help make it more affordable for us."
From average costs to expert advice, get all the answers you need to get your job done.
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