Serving Clinton, Old Saybrook, Guilford, and surrounding shoreline communities

When Quality and Reliability Matter, We Deliver

As Connecticut's premier insulation specialists, we partner with contractors who demand excellence for their projects.

Takes 30 mins
Zero Obligation
Same Day Quote
4.8 Customer Rating
EnergizeCT Network
Licensed & Insured
A man in a hard hat and overalls standing in a room under construction.

We Minimize Your Headaches

Your Industry Experts For Every Insulation Challenge

Home Builder
Framer
contruction
Sider
attic
female-architect
air-conditioning
Takes 30 mins
Zero Obligation
Same Day Quote

Our %bCommercialb% Process

Efficiency Meets Excellence, Every Step of the Way

rapid-response
1
Rapid Response Bidding

Send us your plans or scope, and receive a detailed quote within 48 hours.

Schedule
2
Flexible Scheduling

We work around your timeline and coordinate with other trades to keep your project moving.

professional-installation
3
Professional Installation

Our trained teams handle everything from prep to cleanup, maintaining the highest standards of quality and safety.

quality
4
Quality Assurance

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

Benefits
Cellulose
Fiberglass
Spray Foam
Cost
Superior coverage at budget-friendly rates
Cellulose
Fiberglass
Spray Foam
Meets Building Code
Exceeds Connecticut's strictest building standards for your peace of mind
Cellulose
Fiberglass
Spray Foam
Insect & Rodent Inhibitor
Natural pest protection that safeguards your home's well-being
Cellulose
Fiberglass
Spray Foam
Mold & Fungus Inhibitor
Built-in moisture management for a healthier New England home
Cellulose
Fiberglass
Spray Foam
Sound Protection
Your sanctuary of silence – superior soundproofing for modern living
Cellulose
Fiberglass
Spray Foam
Air Sealant
Seals the hidden leaks that drive up your energy bills
Cellulose
Fiberglass
Spray Foam
Fire Retardant
Advanced fire resistance for uncompromising family safety
Cellulose
Fiberglass
Spray Foam
Easy to Work With
Perfect fit for every space – even your historic home's unique features
Cellulose
Fiberglass
Spray Foam
Net Zero
Investment that pays itself back – turning energy bills into home equity
Cellulose
Fiberglass
Spray Foam

The Nealon Quality Guarantee

Where Historic Charm Meets Modern Efficiency – Without Compromise

reliability

Unmatched Reliability and Quality

fully-licensed

Fully Licensed and Insured

proven-track

Proven track record with leading contractors

Takes 30 mins
Zero Obligation
Same Day Quote
Difference Background

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.

Tom L

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!!

David Chase

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.

Christine

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

Takes 30 mins
Zero Obligation
Same Day Quote

Certifications & Insurance

Why You Can Trust Us

Full Commercial Liability Insurance
EPA Lead-Safe Certified
Licensed Commercial Contractor
EnergizeCT Insulation Installers Network
4.8/5 Customer Rating

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!!!

Dia CJW

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.

Ariyanakylstram

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!

Timothy Saunders

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.

Christine

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!!

David Chase

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.

Tom L

Frequently Asked Questions?

What does insulation really do?

It is one of the most cost-effective ways of saving energy and helping reduce heating and cooling bills. In addition, it adds to the thermal and acoustical comfort to your home.

What are the main areas in a house that should be insulated?

First priority should be the attic, followed by the exterior walls, basement and/or crawlspace. Additional areas that need insulation include kneewalls, kneewall floors, sloped walls, cathedral or vaulted ceilings, and cantilevers.

What is an R-Value?

The amount of insulation installed is specified by an R-Value. This is a measure of the ability for the insulation to resist heat traveling through it. The “R” stands for resistance to heat flow. The higher the R-Value the better the thermal performance. Different climates and locations can require different R-Values.

What R-Value is recommended for the Connecticut area?

In the Attic, at least an R-49, exterior walls R-15 and basements and crawl spaces R-21

What insulation products do you use?

We use blown Class I Cellulose called Green Fiber Sanctuary. Cellulose insulation is an excellent choice because it is eco-friendly, made primarily from recycled paper, and treated for fire and pest resistance. It provides superior thermal performance, effectively sealing gaps and reducing air infiltration for better energy efficiency. Its dense composition also enhances soundproofing, creating a quieter and more comfortable home. Plus, it’s a sustainable option that reduces environmental impact while delivering long-lasting insulation benefits.

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.

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.

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.

Is there an insulation rebate available?

Yes, you can visit energizect.com for more information on the current available programs. Qualified homes can currently receive $1.70 per square foot rebate on attics, walls, garage ceilings (with room above) and rim joists, along with an $.80 per square foot rebate on basements and crawls. This rebate can vary, so check the website for the latest information.

Is there an insulation tax credit available?

Yes, you can claim a 30% tax credit for the products purchased and installed, up to a $1,200 maximum credit. See your tax preparer for details.

What other services do we provide?

We also do insulation removal and venting. We can install gable vents, ridge vents, roof and soffit vents.

What other services do we provide?

We also do insulation removal and venting. We can install gable vents, ridge vents, roof and soffit vents.

Is there an insulation tax credit available?

Yes, you can claim a 30% tax credit for the products purchased and installed, up to a $1,200 maximum credit. See your tax preparer for details.

Is there an insulation rebate available?

Yes, you can visit energizect.com for more information on the current available programs. Qualified homes can currently receive $1.70 per square foot rebate on attics, walls, garage ceilings (with room above) and rim joists, along with an $.80 per square foot rebate on basements and crawls. This rebate can vary, so check the website for the latest information.

Start Your Partnership Today

Join Connecticut's top contractors who trust Nealon Insulation for their high-end residential projects.

4.8 Customer Rating
EnergizeCT Insulation Installers Network
1500+ Homes Upgraded
Licensed & Insured