We're a Hicksville crew that does one thing, insulation, on the same Capes, Colonials, Hi-Ranches, and Split Levels we grew up around. 680+ Long Island homes since Sandy, and we still pick up the phone.
No sales pitch. No "today only" nonsense. We measure your house, we give you a real number, you think about it.
Six quick questions. We'll call you back within 4 business hours. No sales pitch, ever.
We don’t chase roofs, windows, gutters, or HVAC. We install spray foam, blown-in cellulose, fiberglass batts, and basement/crawl-space encapsulation on Long Island homes — and we’ve gotten pretty good at it.
Installed cost ranges for a typical 1,200–2,000 sqft attic floor in Nassau or Suffolk County, before NYSERDA rebates. Material choice, attic access, and existing conditions all affect the final number — these are the ranges we see on real Long Island jobs.
| Material / Scope | Installed Cost / sqft | Typical R-Value |
|---|---|---|
| Blown-in fiberglass | $1.50 – $2.50 / sqft | R-38 to R-49 |
| Blown-in cellulose | $1.40 – $2.20 / sqft | R-38 to R-60 |
| Spray foam — open cell | $1.00 – $2.00 / sqft | R-3.8 / inch |
| Spray foam — closed cell | $3.00 – $5.00 / sqft | R-7 / inch |
| Air seal + R-60 cellulose (most common LI job) | $1,800 – $3,500 total | R-60 |
Prices shown are installed, Long Island labor + materials, 2026. NYSERDA Comfort Home rebates ($1,000–$3,000 typical) are not reflected. Income-eligible homes may qualify for EmPower+ which covers up to 100% of the project cost. See the full pricing breakdown.
Every Long Island town has its own housing stock, soil profile, and energy challenges. Here’s what we see on the ground in the towns where we work most.
Many 1960s colonials in Huntington have original fiberglass batts well below the current R-38 standard — some we measure below R-11. Huntington Station ranch homes and East Northport capes are especially common candidates for full air-seal and R-60 blown-in cellulose upgrades. We run jobs throughout the 11743, 11746, and 11724 ZIP codes most weeks of the year and are one of the only NYSERDA-approved contractors filing Comfort Home paperwork for Suffolk County.
Ranch homes from the 1960s and 1970s are common throughout Smithtown, Kings Park, and Commack. These houses typically have compressed or settled fiberglass that’s lost meaningful R-value over the decades — compressed fiberglass at 3 inches delivers closer to R-7 than the original R-11. We air-seal the ceiling plane first, then dense-pack to R-49 or R-60 cellulose. Smithtown and Kings Park jobs typically qualify for NYSERDA Comfort Home rebates that offset $1,000 to $2,500 of the project cost.
Levittown cape cods and ranches are some of the most common homes on our schedule. Built in the late 1940s and 1950s, they typically have low-pitch roofs with minimal attic depth — which limits access but doesn’t limit results. We use long-reach hoses and targeted air-sealing to hit R-49 even in tight Levittown attics. PSEG Long Island offers rebates through the EmPower+ program for income-eligible households, stacked on top of NYSERDA Comfort Home rebates where both qualify.
Garden City’s older Tudors and colonials often have complex attic geometries — kneewall spaces, dormers, and cathedral sections in addition to open attic floors. We assess each zone separately and spec the right material for each: loose-fill cellulose on the open attic floor, open-cell spray foam in the conditioned dormer rafters, and rigid foam plus cellulose in kneewall bays. Nassau County permit applications for structural air-sealing work in Garden City are handled entirely by our office.
Great Neck’s larger homes — split-levels, large colonials, and pre-war houses along the north shore — tend to have high attic volumes that hold cold air all winter if not properly insulated and air-sealed. We see many Great Neck homes where contractors simply added a layer of batts without addressing bypass paths (chimney chases, partition top-plates, recessed lights). Air sealing those bypasses first is what makes insulation actually work — and it’s the step that generates the NYSERDA rebate measurement credit.
Comfort Home. EmPower+. HEAP weatherization. The forms are long, the portal is clunky, and most contractors hand the packet back and say “you fill this out.” We don’t. Elena submits every application in-house, tracks the status, and discounts the rebate directly off your invoice. If you would rather talk to a human than fill out a form, here is the number.
Every one of these is a Long Island house we insulated. The "before" shot is the day we pulled up. The "after" is the day we drove away. No staging, no filters.
Every Comfort Home and EmPower+ rebate packet — completed, submitted, and tracked by Elena in our office. You get the discount on the invoice. You never see an application form.
We don't do roofs, windows, HVAC, or bathrooms. Just insulation and air sealing. A BPI-certified crew on its 680th house works differently from a general contractor on their 10th, and you'll see it in the blower-door numbers.
We quote you a number after a blower-door-verified energy audit. That's the number. No "today only" discount, no manager call, no pressure to sign tonight. If you need a week to think, take a week.
Nassau HIC #H0109620000. Suffolk HIC #44127-H. $2,000,000 liability. Workers comp on every guy. NYSERDA Approved. BPI Certified. Demilec certified. BBB A+.
No AI on our phones. No call center. Call between 7am and 6pm Monday through Saturday and you get Elena in the office or Carlos in the truck. Nights and weekends, leave a message, we call back next business morning.
Every person on our trucks lives on Long Island. Carlos grew up in Brentwood. Javier has run LI jobsites for 12 years. When we say we know Nassau and Suffolk, we mean we know which inspector covers Hempstead versus Baldwin.
“We had three contractors out. Carlos was the only one who brought a thermal camera on the first visit. He showed us exactly where the basement was leaking warm air at the rim joist and explained why closed-cell foam was the right call there. The crew finished a day early, cleaned up better than our landscaper, and we got a $1,900 NYSERDA rebate discounted off the invoice. Worth every dollar.”
“I'm a skeptical customer. I got four quotes, read every Google review twice, and called two of their references. Long Island Insulation Co. was not the cheapest. They were the ones who answered the phone, showed up when they said they would, filed the NYSERDA paperwork themselves, and didn't move the price after we signed. I'd hire them again tomorrow.”
“Our cape needed a full attic upgrade and everyone else wanted to dump more fiberglass batts on top because 'it's easier.' Carlos walked us through air sealing vs just adding R-value for 40 minutes on the phone, told us honestly we'd see bigger savings from the blower-door-verified air seal first, and he was right. Two years later our oil bills are still 22% lower.”
Our shop is on Old Country Road in Hicksville, smack in the middle of the island, so no address on Long Island is more than an hour from our front door.
Every other insulation website makes you fill out a form and wait. We built actual calculators so you can see a real ballpark and visualize the finish before you even call us.
Tell us your address and what you think you need — attic, basement, whole house, or 'I have no idea.' We'll ask a few questions and schedule a visit, usually within 2–3 business days.
Carlos or Javier comes out with a blower door and thermal camera. We measure actual air leakage, check existing R-values, and identify the biggest energy losses. Takes about 60 minutes. No pitch at the end.
You get a line-item quote within 48 hours. If NYSERDA rebates apply, Elena files the paperwork and discounts the rebate off your invoice. The number we quote is the number you pay.
Our crew installs in 1–5 days depending on scope. After install, we run a second blower-door test to verify the improvement. You get a before/after report showing exactly what changed.
Every one of these is a real question we hear weekly on the phone, in walk-throughs, or at Home Depot on a Saturday morning. No corporate hedging, just the answer.
See all 30+ FAQsLong Island insulation work is split between national chains and local contractors — but local wins on knowledge. Long Island insulation jobs require understanding LIPA and PSEG territory rules, NYSERDA Comfort Home eligibility, and the specific moisture-load that comes from coastal air and shallow water tables on the South Shore. We're BPI-certified, NYSERDA-approved, and have completed insulation upgrades in more than 1,000 Long Island homes since 2008 — both Nassau and Suffolk. We pull all permits, handle NYSERDA rebate paperwork end to end, and back every job with a 10-year air-seal warranty. Call for a free energy assessment and we'll give you an R-value map and a rebate estimate before you commit to anything.
Tell us your address and Carlos will call you back within 4 business hours to schedule a free BPI energy audit. The audit takes 60 minutes. There's no pitch at the end.
or fill out the form, it takes 20 seconds
Five fields. We take it from there.
