KC Insulation Spray Foam Truck Rig is the star of the show when we are at work.

The Warmth of a Home, the Cool of an Office.

KC Insulation Corp is a Long Island insulation company serving Nassau and Suffolk County. Spray foam, blow-in, drywall, and waterproofing in Central Islip, Huntington, Brookhaven, Southampton, East Hampton, and towns from Hempstead to Montauk.

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For General Contractors

The team you need, when you need them.

We align with your building schedule, communicate like part of the crew, and deliver insulation and drywall work that keeps high-end builds moving.

Partner with KC

Get to know us

Our team is dedicated to providing the best possible service to our clients.

Years of Service

K+

Homes Served

Convenient Locations

Family

Owned & Operated

Service Area

Insulation company serving Long Island

Based in Central Islip, KC Insulation provides spray foam, blow-in, fiberglass, drywall, and foundation waterproofing for homeowners and contractors across Nassau County and Suffolk County. We cover Long Island from Hempstead to Montauk, including the Hamptons and the North Fork.

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Nassau County

Hempstead, NY
Glen Cove, NY
Hicksville, NY
Massapequa, NY
Garden City, NY
Levittown, NY
Wantagh, NY
Freeport, NY
Long Beach, NY
Great Neck, NY
Manhasset, NY
Oyster Bay, NY
Syosset, NY
Plainview, NY
Bethpage, NY
East Meadow, NY
Farmingdale, NY
Westbury, NY
Hempstead, NY
Glen Cove, NY
Hicksville, NY
Massapequa, NY
Garden City, NY
Levittown, NY
Wantagh, NY
Freeport, NY
Long Beach, NY
Great Neck, NY
Manhasset, NY
Oyster Bay, NY
Syosset, NY
Plainview, NY
Bethpage, NY
East Meadow, NY
Farmingdale, NY
Westbury, NY

Long Island Sound

Atlantic Ocean

Central Islip, Suffolk County

Suffolk County

Central Islip (HQ), NY
Bay Shore, NY
Smithtown, NY
Huntington, NY
Babylon, NY
Islip, NY
Brentwood, NY
Hauppauge, NY
Commack, NY
Lindenhurst, NY
Amityville, NY
Deer Park, NY
Dix Hills, NY
Melville, NY
Northport, NY
West Islip, NY
Brookhaven, NY
Patchogue, NY
Port Jefferson, NY
Medford, NY
Ronkonkoma, NY
Holbrook, NY
Stony Brook, NY
Centereach, NY
Selden, NY
Coram, NY
Sayville, NY
Lake Grove, NY
Shirley, NY
Rocky Point, NY
Riverhead, NY
Hampton Bays, NY
Southampton, NY
Sag Harbor, NY
East Hampton, NY
Montauk, NY
Greenport, NY
Westhampton, NY
Bridgehampton, NY
Southold, NY
Mattituck, NY
Amagansett, NY
Central Islip (HQ), NY
Bay Shore, NY
Smithtown, NY
Huntington, NY
Babylon, NY
Islip, NY
Brentwood, NY
Hauppauge, NY
Commack, NY
Lindenhurst, NY
Amityville, NY
Deer Park, NY
Dix Hills, NY
Melville, NY
Northport, NY
West Islip, NY
Brookhaven, NY
Patchogue, NY
Port Jefferson, NY
Medford, NY
Ronkonkoma, NY
Holbrook, NY
Stony Brook, NY
Centereach, NY
Selden, NY
Coram, NY
Sayville, NY
Lake Grove, NY
Shirley, NY
Rocky Point, NY
Riverhead, NY
Hampton Bays, NY
Southampton, NY
Sag Harbor, NY
East Hampton, NY
Montauk, NY
Greenport, NY
Westhampton, NY
Bridgehampton, NY
Southold, NY
Mattituck, NY
Amagansett, NY

Insulation company in Hempstead, Nassau County, NY
Insulation company in Glen Cove, Nassau County, NY
Insulation company in Hicksville, Nassau County, NY
Insulation company in Massapequa, Nassau County, NY
Insulation company in Garden City, Nassau County, NY
Insulation company in Levittown, Nassau County, NY
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Insulation company in Central Islip, Suffolk County, NY
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Insulation company in Shirley, Suffolk County, NY
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We offer a wide range of services to meet your needs

Open/Closed Cell Spray Foam

Spray foam insulation is a high-performance alternative to traditional fiberglass and cellulose, acting as both an advanced thermal insulator and a powerful, expanding air barrier.

Sheetrock & Drywall

Precision cutting, secure fastening, and expert handling of complex architectural layouts. From straight runs to vaulted ceilings and curved walls, we hang board that stays true and ready for finish work.

Fiberglass/Rockwool Insulation

The essential building block of any home or business to keep the heat in and the cold out. Fiberglass or Rockwool insulation.

Foundation Waterproofing

Foundation and basement waterproofing built for Long Island's moisture challenges. We protect your investment by spraying a waterproof membrane on the exterior of the foundation.

Blow-In Insulation

Loose-fill cellulose or fiberglass blown into open attics, and top-ups over settled insulation that has lost R-value over the years.

The KC Standard for Quality

Insulated. Drywalled. And a job well done.

A snapshot of the finish quality and jobsite cleanliness contractors and homeowners expect from KC. Every job is a chance to prove our commitment to quality.

01/04

Spray Foam

Tight cavities, clean passes

We apply professional A&B spray foam in open walls, from rim joists to roof decks.

02/04

On Site

Pro-grade equipment, every job

We bring barrel spray foam systems to every job, with a consistent mix and a clean setup.

03/04

Roof Deck

Thermal coverage where it counts

Roof and attic insulation that keeps heat in, moisture out, and the finished space comfortable year-round.

04/04

Finish Quality

Paint-ready when we leave

We finish drywall, spackle, and cleanup to contractor standards so the next trade can start on time.

01 / 04

Free Estimate

Contact us to Schedule a Free Quote for your next home improvement project.

Homeowners and general contractors can share a few project details here. We follow up with next steps for a free insulation or drywall quote.