*The Angi rating for Insulation Service companies in Greenwich, 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 Greenwich, 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 Greenwich, 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 Greenwich, CT and surrounding areas
Approved
In business since 2009
Free estimates
Credit card accepted
"My experience with everyone was excellent. It started with an energy assessment followed up with spray foam insulation throughout my home. Good customer service and follow-up. All was explained thoroughly throughout the process and they welcomed my questions. I highly recommend this service."
+15
Serving Greenwich, 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 Greenwich, CT and surrounding areas
Approved
In business since 2015
Free estimates
Warranties offered
"The crew worked quickly and efficiently to replace and upgrade the fiberglass batts in our basement and crawl space. I’m pleased with the outcome. (I put in even more wire supports afterwards — to secure the insulation between the joists — but that’s just my OCD.) It was a relatively small job for this company and I thought the cost was fair."
+21
Serving Greenwich, CT and surrounding areas
Approved
In business since 2000
Free estimates
Warranties offered
"All went really well. Prior to the appointment, I was sent reading material which was helpful and prepared me for the appointment. On the day of the appointment, Nick was professional and personable. His presentation was outstanding. I really liked the videos. I had several questions, and I felt like Nick took his time to ensure I understood and was satisfied with each answer. My neighbors had their attic sprayed by Foamco and they’re extremely satisfied. According to them, their house is much more comfortable during the winter and summer, and they’re saving money monthly on energy bills. The only reason I didn’t get it done was because of sticker shock."
+10
Serving Greenwich, CT and surrounding areas
Approved
In business since 2018
Free estimates
Emergency services offered
"I don’t know why anyone would hire anyone else. Anthony is courteous/responsive, knows insulation cold, was quick to provide estimates and service and is smart about his hires, with net results—great workmanship at a very fair price."
+5
Serving Greenwich, 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 Greenwich, 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 Greenwich, 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 Greenwich, CT and surrounding areas
Approved
In business since 2004
Free estimates
Emergency services offered
"Window & roof insulation quick, easy, & affordable!"
From average costs to expert advice, get all the answers you need to get your job done.
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