Spray foam insulation on Long Island

Spray foam for Long Island homes

Long Island homes tend to be larger, with full attics and basements. Spray foam seals and insulates in one layer, so it suits the parts of a house that are hardest to insulate well.

Where we spray

• Attics and cathedral ceilings: foam under the roof deck in capes, colonials and finished attics.
• Rim joists: the band around the basement, a big source of drafts.
• Basements and crawl spaces: closed-cell foam on foundation walls.
• Shore homes: on the South Shore, closed-cell foam where moisture and wind are a concern.
• Pole barns and garages: closed-cell foam that also stops condensation.

Open cell or closed cell?

• Closed cell: dense and water resistant, for rim joists, basements, crawl spaces and shore homes.
• Open cell: lighter, for pitched roofs and walls, and it quiets noise.

Rebates

On Long Island, gas is mostly National Grid and electric is PSEG Long Island. Depending on your home and what is funded this year, that can open National Grid, PSEG Long Island or NYSERDA programs. For 2027, Con Edison and National Grid plan one joint weatherization program for market-rate homes and apartment buildings. We check what is open for your address before we price the job. See the rebate guide.

Common questions

Do you cover all of Long Island? We cover Nassau and Suffolk. Call (347) 200-5089 to check your town.

How long does it take? Most homes take one or two days.