Real Long Island insulation pricing. No fabricated numbers.
Every number on this page is an industry range benchmarked against Remodeling Magazine Cost vs Value, HomeAdvisor True Cost, and Angi LI regional data. We never quote a single fake price to a homeowner who has not had a walk-through.
What a Long Island insulation project actually costs
Ranges below assume a 2,000 sqft Long Island home (typical 4-bed Colonial, Cape, or Hi-Ranch), standard attic access, blower-door verification, permits where required, and a 10-year workmanship warranty. NYSERDA Comfort Home and EmPower+ rebates come off the invoice after the install.
Closed-Cell Foam
- 80–100 year lifespan
- Lifetime on material, 10 years on installation
Open-Cell Foam
- 80–100 year lifespan
- Lifetime on material, 10 years on installation
Cellulose
- 50–80 year lifespan
- Lifetime on material, 10 years on installation
Fiberglass
- 30–50 year lifespan
- Lifetime on material, 10 years on installation
Attic Upgrade
- 50–80 year lifespan
- Lifetime on material, 10 years on workmanship
Crawl Encapsulation
- 30–50 year lifespan
- Lifetime on material, 10 years on workmanship
Rim Joist
- 50–80 year lifespan
- Lifetime on material, 10 years on workmanship
Whole-Home
- 50–80 year lifespan
- Lifetime on material, 10 years on workmanship
Why your neighbor’s quote looked different
Same house on paper can land $8,000 apart depending on what’s under the existing insulation, how many stories, and whether the town is in a historic district. Here are the adjustments we see most.
Want the number for your specific house?
Give us your address. Carlos will come by for a 60-minute BPI energy audit — blower door, thermal camera, insulation inventory — and send you a written scope with NYSERDA rebate pre-calculated within 48 hours. If you like it, great. If not, no hard feelings.
or fill out the form, it takes 20 seconds
Schedule a walk-through
Five fields. We take it from there.