$50 OFF if Installed by June 30
Serving Clinton, Old Saybrook, Guilford, and surrounding shoreline communities

Expert Fiberglass Insulation for Homes in Connecticut

Fiberglass delivers reliable, cost-effective comfort—great for homeowners who want proven performance and year-round energy savings without overcomplicating things.

Takes 30 mins
Zero Obligation
Same Day Quote
4.8 Customer Rating
EnergizeCT Insulation Installers Network
Licensed & Insured
Fiberglass insulation in a wall next to stairs
Fiberglass crawlspace insulation

Fiberglass Insulation is a Solid Choice

The benefits of using fiberglass insulation.

Nealon Insulation truck
Fiberglass being installed
Fiberglass crawlspace insulation
Fiberglass ceiling insulation
A person installing insulation in the walls
Rolling Up Fiberglass Insulation
Fiberglass insulation in the roof
Takes 30 mins
Zero Obligation
Same Day Quote

Your Path to Superior Insulation Starts Here

Efficiency Meets Excellence, Every Step of the Way

rapid-response
1
Get a free estimate

Building science is complicated. Our estimators don't just tell you what we'll do, they explain why we're doing it.

Schedule
2
Schedule the Work

We work with your timeline and availability. We typically schedule 2 - 4 weeks out

professional-installation
3
Insulation Begins

You will have a dedicated project lead and project manager who will walk you through every step of the process

enjoy-home
4
Enjoy your Home

Your home becomes your comfort zone, as you stop dealing with drafty rooms, inconsistent temperatures, and high energy bills.

Takes 30 mins
Zero Obligation
Same Day Quote

When to Choose Fiberglass Insulation?

Here are common scenarios when fiberglass is the right insulation choice for you.

You’ve Got a Big Attic and a Budget to Watch

Need to cover a lot of square footage without breaking the bank? Fiberglass batts or blown-in options give you solid R-value at one of the best price points per square foot. Perfect for attics, basements, and bonus rooms that need a fast, effective solution.

Fiberglass being installed

You're Renovating or Building New

If the walls are already open, fiberglass slips right in—quick, clean, and cost-efficient. It’s a go-to for builders and remodelers who want reliable performance without the mess.

Fiberglass ceiling insulation

You Want Fire Resistance Without Extra Chemicals

Fiberglass is naturally non-combustible. No need for added fire retardants—just solid peace of mind baked right in.

Moisture-Prone Areas

You’ve Got Moisture-Prone Areas

Basements, crawlspaces, garages—fiberglass holds up well in areas where humidity can be an issue. It doesn’t absorb water, which helps prevent mold and mildew from making themselves at home.

Worker wearing gloves installing pink fiberglass

You’re Just Looking to Knock Down the Noise

Got thin walls or loud teenagers? Fiberglass adds a layer of soundproofing that can make your evenings a little quieter—without the need for specialized (and pricey) acoustic setups.

The Nealon Difference

Where Historic Charm Meets Modern Efficiency – Without Compromise

Home Specialists

Older Home Specialists

As EPA Lead-Safe certified contractors, we understand the unique challenges of insulating historic New England homes.

Energy Saving

Proven Energy Savings

Our customers typically see a 30% reduction in energy costs after our professional insulation services. Your investment often pays for itself through years of lower utility bills.

Assessment Process

Professional Energy Assessment Process

Every project begins with a thorough energy assessment to identify your home's specific needs.

Takes 30 mins
Zero Obligation
Same Day Quote
Difference Background

Frequently Asked Questions?

Is fiberglass insulation safe?

Yes, fiberglass insulation is safe when properly installed and handled with care. During installation, its glass fibers can irritate skin, eyes, and lungs. Wearing gloves, masks, and protective clothing reduces exposure. Once sealed behind walls, it poses minimal health risks.

How long does fiberglass insulation last?

Fiberglass insulation can last 80 to 100 years under ideal conditions. Its performance may decline after 15 to 20 years due to moisture, settling, or damage. Regular inspections help identify when replacement is needed to maintain energy efficiency.

Where is fiberglass insulation best used?

Fiberglass insulation is best used in walls, attics, basements, and ceilings. It fits easily between studs, joists, and beams, making it ideal for unfinished spaces. Its thermal resistance reduces heat transfer and improves energy efficiency in both homes and commercial buildings.

Does fiberglass help with soundproofing?

Yes, fiberglass insulation helps with soundproofing by absorbing sound and reducing noise transmission. It’s commonly used in walls, ceilings, and floors to dampen airborne noise and improve acoustics. While not a full sound barrier, it provides noticeable noise reduction.

Can fiberglass insulation get wet?

Yes, fiberglass insulation can get wet, but it loses effectiveness when saturated. Moisture reduces thermal performance and can lead to mold growth. If it dries fully and remains undamaged, it may still be usable. Prolonged exposure usually requires replacement.

Is fiberglass better than cellulose or spray foam?

Fiberglass is more affordable and easier to install than cellulose or spray foam but offers lower R-values and air sealing. Cellulose provides better thermal performance and is eco-friendly. Spray foam has the highest R-values and best air sealing. The best option depends on your goals and budget.

Can you install fiberglass insulation over old insulation?

Yes, you can install fiberglass insulation over old insulation if it is dry, mold-free, and not compressed. Avoid adding insulation with a vapor barrier, which can trap moisture. Inspect for structural damage or pest issues before installing new layers.

Does fiberglass insulation itch?

Yes, fiberglass insulation can itch because its tiny glass fibers irritate the skin. Contact during installation often causes discomfort. Wearing gloves, long sleeves, and protective gear helps prevent irritation when handling fiberglass.

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

Nealon Energy Solutions has been my go to company for my personal property energy solutions & savings and all of my residential remodeling projects. as a remodeling contractor myself, I take pride in utilizing quality trades people, using quality products that perform at the top of their game. Nealon has the depth of experience that is in my opinion unmatched in the CT business market. Clients appreciate the thorough explanations of the options available to them, the professional execution of the contracted work and the cleanliness of the project when the work is completed. GO NEALON!!

Jonathan Knight Remodeling

Ready To Start Saving?

Schedule your FREE home energy assessment today. No pressure, no obligation— just expert advice for your home's needs.

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