Coastal Insulation Co
Call (800) 555-0602

Long Island's Premier Insulation Company

Professional insulation for Long Island homes — attics, walls, basements, and crawl spaces. Cut your PSEG bill and improve comfort across Nassau and Suffolk counties.

Get Your Free Estimate
NYS Licensed & InsuredBPI CertifiedEnergy Star PartnerFinancing Available

Our Insulation Services

🏠

Attic Insulation

Blown-in and batt insulation for attics — the #1 source of heat loss in most homes. Immediate energy savings.

🧱

Wall Insulation

Dense-pack cellulose and injection foam for existing walls. No major demolition required.

💨

Spray Foam Insulation

Closed-cell and open-cell spray foam for maximum R-value, air sealing, and moisture protection.

🏗️

Basement & Crawl Space

Rigid board, spray foam, and vapor barriers for below-grade spaces. Stop moisture and heat loss at the foundation.

Why Long Island Homeowners Choose Us

3,000+

Homes Insulated

Thousands of homes made more comfortable and efficient.

40%

Energy Savings

Average reduction in heating and cooling costs.

4.9★

Average Rating

Top-rated insulation contractor in the region.

$0

Down to Start

Flexible financing and rebate assistance included.

Get Your Free Insulation Estimate

Fill out the form below and we'll get back to you within 24 hours.

Serving All of Long Island

Many Long Island homes — especially mid-century builds in Levittown, Hicksville, and Massapequa — were built with minimal insulation. Upgrading your attic, walls, and crawl space dramatically cuts PSEG Long Island bills and improves year-round comfort. Our BPI-certified crews serve all of Nassau and Suffolk counties with spray foam, blown-in, and batt insulation.

HempsteadHuntingtonIslipSmithtownBrookhavenBabylonOyster BayNorth HempsteadRiverheadSouthamptonEast HamptonMassapequaLevittownHicksvilleCommackLindenhurstValley StreamLong BeachFarmingdalePatchogue
Coastal Insulation Co | Long Island Insulation Experts