5 Best Insulation Services in New York (2026)

Independently ranked by our review of ratings, reviews and reputation · How we chose

By Brad Smith, Home Services Expert · ✓ Data verified July 2026 · 8 min read

Your heating bill doubled and the attic is the obvious suspect. Insulation work is one of those jobs where the difference between a good crew and a bad one hides behind drywall for years, so a track record matters more than a sales pitch. Every insulation contractor in New York on this page sits at 4.9 or 5.0, a tenth of a star apart at most, backed by as many as 101 reviews for the top name.

Short answer: A&J Insulation in Brooklyn tops the list with a perfect 5.0 rating across 101 reviews and zero negative reviews on file. Go Go Green and Insulation Builders are close behind, both also at 5.0, while Foam Insulation Solution and A1 Foam Fire Water Seal round out the list at 4.9. All five specialize in spray foam or full building-envelope sealing.

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1. A&J Insulation
2. Go Go Green
3. Foam Insulation Soluti…
4. A1 Foam Fire Water Sea…
5. Insulation Builders
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New York's top insulation contractors, compared

#	Business	Rating	Reviews	Best for
1	A&J Insulation	5.0 ★	101	Overall / spray foam attic work	View ›
2	Go Go Green	5.0 ★	82	Cellulose and blown-in insulation	View ›
3	Foam Insulation Solution	4.9 ★	61	National Grid rebate paperwork help	View ›
4	A1 Foam Fire Water Seal	4.9 ★	61	Multi-trade sealing (fire, water, and foam)	View ›
5	Insulation Builders	5.0 ★	43	Smaller residential attic jobs	View ›

5 Best Insulation Services in New York (2026)

Our picks, reviewed one by one

#1 Overall🕑 Open 7 days↩ Responds to reviews

A&J Insulation

5.0101 Google reviews

A&J Insulation is a Brooklyn-based contractor specializing in spray foam insulation, alongside fire protection and waterproofing work. Run day-to-day by Jesse, the crew handles both new attic jobs and retrofit spray foam in existing walls, and reviewers describe the same technician showing up, explaining the process, and following through on the quote.

What people praise

Every single review on file is 5 stars, a genuinely clean sheet at over 100 reviews
Jesse specifically praised for clear communication and explaining the process before starting
Reviewers note noticeable energy savings after the job (fewer nooks left unsealed)
Crews described as punctual, respectful of the home, and clean on cleanup

Reputation scorecardrank in New York

Rating5 / 5

Review volume101 · 98th

Confidencemoderate

Recency2 months ago

Info completenesssite · phone · hours

Rating breakdown100% 5-star

✓ VerifiedSource: Google

Our take: It ranks first on the strongest combination of a perfect rating and the largest review base of the group (101). If you're set on spray foam specifically, this is the most-reviewed specialist on the list.

Website +1718-435-3364 Directions

5923 Strickland Ave, Brooklyn, NY 11234

#2🕑 Open 7 days↩ Responds to reviews

Go Go Green

5.082 Google reviews

Go Go Green Insulation is a Brooklyn contractor built around eco-friendly insulation, energy audits, and air sealing, run by Devon and a small crew. Its site frames the pitch as fast, flexible scheduling with sustainable materials, and reviewers back up the cellulose and blown-in attic work specifically, alongside some drywall repair jobs that come up in the same visits.

What people praise

Fast turnaround repeatedly mentioned, jobs booked and completed within a week in several reviews
Customers note noticeable temperature difference the same day the work finished
Pricing comes up as fair to affordable across multiple reviews, not just one

Reputation scorecardrank in New York

Rating5 / 5

Review volume82 · 93rd

Confidencemoderate

Recency4 months ago

Info completenesssite · phone · hours

Rating breakdown96% 5-star

✓ VerifiedSource: Google

Our take: It ranks second on a perfect 5.0 average across 82 reviews. Slightly smaller volume than A&J, but the reviews are just as specific and just as recent.

Website +1347-515-1822 Directions

304 Schenck Ave, Brooklyn, NY 11207

#3🕑 Open 6 days/wk

Foam Insulation Solution

4.961 Google reviews

Foam Insulation Solution is a Brooklyn spray foam contractor that also stocks and sells insulation materials directly. Reviewers name two people repeatedly, Amos and Mendy, and describe the crew helping customers navigate the National Grid Energy Efficiency Rebate program on top of doing the physical install, which isn't something every contractor on this list offers.

What people praise

Reviewers specifically credit the team with helping secure utility rebates, not just installing insulation
Century-old homes and older attics mentioned as handled carefully, with attention to sealing every crevice
Pricing described as competitive against other quotes customers had gathered

Worth knowing

Most of the detailed reviews are a couple of years old rather than from the last few months, worth confirming current availability before you book

Reputation scorecardrank in New York

Rating4.9 / 5

Review volume61 · 85th

Confidenceearly

Recency8 months ago

Info completenesssite · phone · hours

Rating breakdown97% 5-star

✓ VerifiedSource: Google

Our take: It ties for third with A1 Foam Fire Water Seal at a 4.9 average, but we placed it ahead on more recent review activity. The rebate-navigation help is a genuine differentiator if you're trying to use the National Grid program.

Website +1888-616-8704 Directions

4205 Avenue H, Brooklyn, NY 11210

#4🕑 Open 5 days/wk

A1 Foam Fire Water Seal

4.961 Google reviews

A1 Foam Fire Water Seal, trading as A1 Seal, is a Brooklyn contractor combining six trades under one roof: spray foam insulation, firestopping, waterproofing, floor coatings, pipe insulation, and garage seal work. It positions itself for larger residential, commercial, and industrial jobs, and reviewers mention large-scale projects like a 500-unit building alongside smaller residential work.

What people praise

Handles multiple building-envelope needs in one contractor (fire, water, and thermal sealing), useful if you need more than just insulation
Reviewers specifically praise Sam and the project management on larger jobs
Described as following code requirements closely on commercial-scale work

Worth knowing

Nearly all of the detailed reviews on file are several years old rather than recent, worth asking for a current reference before a large job

Reputation scorecardrank in New York

Rating4.9 / 5

Review volume61 · 85th

Confidenceearly

Recency6 years ago

Info completenesssite · phone · hours

Rating breakdown95% 5-star

✓ VerifiedSource: Google

Our take: It ties for third at 4.9, and the review count (61) matches Foam Insulation Solution exactly. If your job spans more than insulation (fire stopping, waterproofing too), this is the more versatile option of the two.

Website +1718-831-7300 Directions

31 Warsoff Pl, Brooklyn, NY 11205

#5🕑 Open 5 days/wk↩ Responds to reviews

Insulation Builders

5.043 Google reviews

Insulation Builders is a Brooklyn-based contractor run with Shai Cohen handling much of the customer-facing work, specializing in attic insulation and rebate navigation through National Grid and Con Edison. Reviewers describe smaller residential jobs, from a single attic to a couple of homes for the same customer, done in a few hours rather than a multi-day install.

What people praise

Shai Cohen named directly and praised for flexibility around scheduling and clear cost estimates
Jobs described as efficient, often complete in around two hours for a standard attic
Clean-up after the job specifically called out as thorough

Worth knowing

The smallest review base of the group (43), so the track record, while strong, is a shorter one

Reputation scorecardrank in New York

Rating5 / 5

Review volume43 · 73rd

Confidenceearly

Recency5 months ago

Info completenesssite · phone · hours

Rating breakdown98% 5-star

✓ VerifiedSource: Google

Our take: It ranks fifth on a perfect 5.0 average but the smallest sample size here. Worth a call if you have a smaller, straightforward attic job and want a contractor who handles rebate paperwork directly.

Website +1347-200-5089 Directions

3701 Bedford Ave, Brooklyn, NY 11229

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How we score insulation contractors

Rating is the live Google average pulled directly from each business’s profile. Review volume measures how many customers actually left a rating, which we weigh against the average, since a perfect score on a handful of reviews carries less confidence than one built on a hundred. Recency checks whether people are still reviewing the business now or only years ago. No business can pay to change any of these numbers.

What insulation costs in New York (2026)

None of the five contractors here publish a fixed price list, and insulation cost depends heavily on the type of material (spray foam versus blown-in cellulose versus fiberglass), the square footage, and whether you’re insulating an attic, walls, or both, so we’re not going to guess at a number. What consistently moves the price in reviewers’ own accounts: material choice (foam runs above cellulose or fiberglass), the age and accessibility of the building, and whether you qualify for a National Grid or Con Edison rebate, which several of these contractors specifically help customers apply for.

Insulation services across New York

Every contractor on this list is based in Brooklyn, but all serve the wider metro, including Queens, Manhattan, and in several cases the Bronx and Staten Island. If you’re searching for insulation services near me from another borough, don’t rule these out; multiple reviewers specifically mention jobs done outside Brooklyn itself.

What to ask before you hire an insulation contractor

Which material do you recommend for my attic or wall type, and why (spray foam vs. blown-in vs. fiberglass)?
Can you help with National Grid or Con Edison rebate paperwork?
Is the crew licensed and insured for spray foam work specifically?
How long will the job take, and does the price include cleanup and disposal of old material?
Do you offer any warranty on the insulation itself or just the labor?

Frequently asked questions

Are these rankings paid?

No. Rankings come from public Google data. A business can pay to be a Featured Partner (badge plus top placement), but that never changes another business’s score or position.

How did you choose these five?

We pulled every insulation contractor serving New York with a meaningful Google presence, then ranked by a blend of star rating, review volume, and how recently people are still leaving reviews.

How often is this page updated?

We refreshed this ranking in July 2026 using live Google data. Ratings and review counts shift over time, so treat the numbers here as a snapshot rather than fixed.

Is spray foam always the best choice?

Not necessarily. It’s effective for air sealing but costs more than cellulose or fiberglass, and the right material depends on your building type, budget, and whether you’re chasing a specific rebate program.

The bottom line

A&J Insulation is the safe default: a perfect rating on the deepest review base of the group, with a documented pattern of clear communication and clean work. If rebate paperwork is your main headache, Foam Insulation Solution and Insulation Builders both have a specific track record of walking customers through National Grid and Con Edison programs.

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