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 did an excellent job. They were very professional and quickly, efficiently and cleanly put new blown insulation on the attic floor of my old house. He also explained clearly how the insulation works, the R values and benefits. Thank you Discount Insulation."
+6
Serving Cos Cob, CT and surrounding areas
Approved
In business since 2015
Free estimates
Warranties offered
"My experience from start to finish was excellent! From The office staff to the insulation team. All work done as described.â EXCELLENT job!!"
+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
"Ecofoam insulated my attic with closed-cell spray foam and the results came out great. The space feels completely sealed and much more comfortable already. Sevi and the team were very professional, easy to work with, and kept me updated throughout the whole process. I would highly recommend EcoFoam for anyone looking for quality insulation work."
+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
"I was impressed with the quality and skill of the crew, they knew exactly what to do and the result was excellent. I was extremely impressed with the quality of the insulation, and feel much more comfortable with my home! The foreman was excellent, very skilled, and the turn out was outstanding!"
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.
The cost of blown-in insulation in New York, NY varies depending on the type of insulation, labor, prep work, and more. Learn more about the cost factors in this guide.
New insulation makes your home more comfortable and boosts energy efficiency. Use this guide to budget for insulation installation costs in New York, NY.
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 New York, NY.
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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.
