When Quality and Reliability Matter, We Deliver
As Connecticut's premier insulation specialists, we partner with contractors who demand excellence for their projects.
We Minimize Your Headaches
Your Industry Experts For Every Insulation Challenge







Our %bCommercialb% Process
Efficiency Meets Excellence, Every Step of the Way
Send us your plans or scope, and receive a detailed quote within 48 hours.
We work around your timeline and coordinate with other trades to keep your project moving.
Our trained teams handle everything from prep to cleanup, maintaining the highest standards of quality and safety.

Every installation is inspected and verified to meet our rigorous standards and your specifications.
Why %wCellulosew% Insulation?
The Smart Choice For Performance, Value, and Sustainability
The Nealon Quality Guarantee
Where Historic Charm Meets Modern Efficiency – Without Compromise

Unmatched Reliability and Quality

Fully Licensed and Insured

Proven track record with leading contractors

Why Leading Contractors Choose %wNealonw%?
Why over 400 Connecticut businesses have trusted us for 48 years

Great experience! Very friendly and professional. They were on time, stuck to their quote and work timeline and have done a great job with two projects for me. I would definitely recommend.

Fast, efficient and great price! Didn’t even notice them insulating our attic and making a big difference already! Would highly recommend for anyone that wants to cut down on their energy bill!!

The Nealon team was professional and considerate of my property. I noticed a 200-kilo watt decrease in my electric bill along with an additional savings in oil consumption of 50 gallons. No more drafty cellars and so far, the mice have gone elsewhere.
Cozy Winters, Cool Summers - Guaranteed
Experience year-round comfort with our precision installation guarantee
Your Home Deserves The Royal Treatment
Careful, clean, and respectful - we treat every project like it's our own family's home
Natural and
Eco-Friendly Products
Our products don't emit dangerous chemicals into your home
Trusted by Your Neighbors Since 1977
Join thousands of happy Connecticut homeowners who sleep better in their cozy homes
Certifications & Insurance
Why You Can Trust Us
Reviews from our customers over 48 years

Nealon did an outstanding job in terms of courteous services, as their team members, as well as Chris who was responsible for directing the job, were most professional!!! They cleaned up nicely, and my goods remained intact. Also and happily stated, it’s been one week since they’ve installed insulation in our home, and we notice a huge difference in the amount of energy we are using for heating…which equates to $avings!!! In short, we’d use them again, and glad we chose them for this endeavor!!!

Highly recommended. Their estimate was competitive, the work was done in a timely and clean manner, they explained what was done, and our house is warmer as we head into the winter. When we had a question, they came back out to talk with us and helped us answer our questions. I will use them again and recommend them to anyone.

They are an amazing company to do work with! Jen in the office is polite, pleasant, and very competent. The work was done well and very quickly. We had our attic and basement insulated. I would 100% recommend!

The Nealon team was professional and considerate of my property. I noticed a 200-kilo watt decrease in my electric bill along with an additional savings in oil consumption of 50 gallons. No more drafty cellars and so far, the mice have gone elsewhere.

Fast, efficient and great price! Didn’t even notice them insulating our attic and making a big difference already! Would highly recommend for anyone that wants to cut down on their energy bill!!

Great experience! Very friendly and professional. They were on time, stuck to their quote and work timeline and have done a great job with two projects for me. I would definitely recommend.
Frequently Asked Questions?
What if I don’t know what is existing in my walls, can you find out?
Yes, we would first ask when your house is built as that is a determining factor. Building codes started in 1971 in Connecticut so anything prior most times is empty unless renovated, but in between years may so we can provide you with a wall test. This is where we would remove a couple rows of siding or pieces of clapboard, drill a 2 1/8” hole to see what is inside and replace the siding. We can add here, we usually charge $150 for a wall test, which we would credit to the job if they were in need of insulation and went with us. You can also choose to get an energy audit to have a blow-door test to find out your insulation needs. This is related to the insulation rebates available and more information can be found at energizect.com.
How do we remove insulation in an attic space?
If the insulation existing in an attic space is batting, we bag, seal and haul it out of the attic space. If the insulation existing is blown, we use a Hepa Vac System, in which we vacuum out from the attic through a hose the insulation, which is collected in a Hepa vac bag outside the premises and hauled away.
Can you be home when the insulation is installed?
You can stay home during insulation installation because the process is minimally invasive and generally quick. Insulation is installed using equipment designed to contain dust and debris, ensuring a clean and safe environment. Nealon also takes precautions to work efficiently and respect your space, allowing you to go about your day while the work is completed.
Start Your Partnership Today
Join Connecticut's top contractors who trust Nealon Insulation for their high-end residential projects.