Spray Foam Insulation in NYC

Spray foam that insulates and seals in one step

Spray foam goes on as a liquid, expands into every gap, and cures into a solid layer of insulation and air barrier. That’s why it works so well in New York’s older homes and buildings, where the roof decks, rim joists and framing are full of cracks that batts and boards can’t seal. We install it with our own crew and our own rig, across Brooklyn, Queens, Manhattan, the Bronx, Staten Island and Long Island.

Open cell or closed cell?

Open cell spray foam

Soft, light foam at about R-3.6 to R-3.8 per inch. It fills deep cavities at a lower cost and absorbs sound well.

• Attic roof decks and cathedral ceilings
• Interior walls and floors where noise is the concern
• Large cavities where thickness is easy to add

Closed cell spray foam

Dense, rigid foam with the highest R-value per inch, about R-6 to R-7. It blocks moisture and adds stiffness to the surface it’s sprayed on.

• Basements, rim joists and crawl spaces
• Exterior walls where space is tight
• Flat roofs, commercial and industrial buildings
• Anywhere damp air or condensation is a concern

Not sure which you need? We’ll look at the space and tell you, and our instant estimate shows both price ranges.

Where we use spray foam

• Attics and roof decks: brings the attic inside the insulated part of the house, so ducts and equipment up there stop losing heat.
• Rim joists: the band of wood on top of the foundation wall is one of the leakiest spots in any house.
• Basements and crawl spaces: closed cell on the walls keeps floors warmer and controls moisture. See crawl space insulation.
• Walls during renovation: when walls are open, foam gives the most insulation in the least space.
• Commercial, industrial and multifamily: warehouse roofs, metal buildings, bulkheads and ceilings over unheated space.

How a spray foam job goes

1. Visit and estimate. We measure, check for moisture and wiring issues, and give you a written price.
2. Prep. We cover floors and anything nearby, and set up ventilation.
3. Spray. Most homes take one or two days.
4. Cure and clean up. Foam cures quickly. We trim, clean up and walk the work with you. Plan to stay out of the work area while we spray and for the cure time we give you.

Rebates

Spray foam often qualifies for utility and NYSERDA programs when they’re funded. We check what’s open for your address and file the paperwork. See our NYC insulation rebate guide.

Common questions

Is spray foam safe? Once cured, yes. The safety rules are about installation: trained installers, protective gear, ventilation, and keeping people out of the space while it’s sprayed and curing.

Does spray foam replace air sealing? Where it’s sprayed, it is the air seal. We still seal other leaks in the house, like the attic floor and plumbing runs. See air sealing.

Can it go over old insulation? Usually we remove old batts from a roof deck first, so the foam bonds and seals properly.