4.5 
106 *The Angi rating for Insulation Service companies in Danbury, 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 Danbury, 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 May 20, 2026
Serving Danbury, 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 Danbury, 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 Danbury, CT and surrounding areas
Approved
In business since 1981
Free estimates
Credit card accepted
"Discount Insulation quoted a fair price, showed up on time, and did an excellent job insulating the crawl space in our new home. I already feel a difference in how warm our home feels. Stu, the owner, is wonderful to work with and is an excellent resource for all things insulation and beyond. Highly recommend hiring them for any insulation projects in your home."
+6
Serving Danbury, 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 Danbury, CT and surrounding areas
Approved
In business since 2021
Free estimates
Credit card accepted
Get reliable insulation services from responsible insulation contractors: Top Notch Home Solution, LLC. Family-owned and operated in Cromwell, CT, we are professional providers of residential & commercial insulation services. We have 19 years of experience performing insulation services, among other services ranging from door &b window installation to HVAC services and offer..."Top-Notch Home Services.?
Serving Danbury, CT and surrounding areas
Approved
Super Service Award Winner
In business since 2020
Free estimates
Warranties offered
"They were very professional, took care of helping me get the home energy audit and the rebates for attic and wall insulation. Also improved attic ventilation installing soffit vents and baffles. We got three estimates and they were a very good price, but the service is what sold us."
+1
Serving Danbury, CT and surrounding areas
Approved
In business since 2018
Free estimates
Emergency services offered
"Anthony and his team did an incredible job insulating our full gut remodel in Fairfield. He took the time to put together a foam package that made the most of our budget. The crew was polite, neat and efficient. They took great care to cover finished surfaces before spraying and did a thorough clean up so we could jump right into sheet-rocking. Highly recommended for quality of work, constant communication and value!"
+5
Serving Danbury, 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 Danbury, 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 Danbury, CT and surrounding areas
Approved
In business since 2015
Free estimates
Emergency services offered
"They did a really good job at my house. Any questions I had they were willing to answer it. I really recommend them"
+26
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.
