Spray Foam Insulation FAQs Brooklyn

Open-cell foam runs $1.50–$3.50 per board foot installed; closed-cell runs $2.50–$5.00. A typical attic job is $2,500–$7,000, a basement $2,500–$6,000, and a whole-house rowhouse $8,000–$18,000. Our Brooklyn cost guide breaks down what drives the price.

Open-cell is lighter and cheaper (~R-3.5 per inch), great for attics and interior walls, and better at absorbing sound. Closed-cell is denser and pricier (~R-6.5 per inch) and resists moisture, making it the pick for basements and roof decks. See our full open-cell vs. closed-cell comparison.

Once cured — typically within 24 hours — spray foam is inert and safe. During installation we ventilate the work area and ask you and your pets to stay out of the work zone until curing is complete.

Most single-family jobs take one to two days; attics and basements are often done in a single day. We schedule around your life.

Insulation is the building owner's decision — renters can't authorize it themselves. But many renters bring us in: we can assess the unit and give your landlord a written quote showing the payback, which sometimes gets them to split the cost.

Usually yes, but alteration agreements almost always require board approval first. We work with shareholders regularly and can provide the written scope most boards ask for.

We foam the parts of landmark brownstones that don't show — attics, cellars, rim joists, open wall cavities — without touching plaster, moldings, or woodwork. Foam is less invasive than blown cellulose, which requires drilling through walls.

Often, yes. National Grid efficiency programs and federal tax credits for home improvements have covered insulation upgrades — we've seen customers cut net costs by 15–30%. Programs change, so ask us what's current during your free estimate, or read our rebates guide.

Fall is ideal — you lock in scheduling before the heating season and the foam is working by the first cold snap. But we install year-round: if your January bills are spiking, don't wait for spring.

Yes, meaningfully. Open-cell foam in party walls and exterior walls dampens airborne noise — traffic, voices, music. It's not a recording studio, and it won't fix bad windows, but most clients notice the difference.

Usually yes, at least in the areas being foamed — old batts are often compressed, dirty, and full of gaps. We can handle removal as part of the job and include it in your quote.

Check for a NYC home improvement contractor license, real insurance (liability plus workers' comp), a written itemized quote naming foam type and inches, and a contractor who can explain open vs. closed cell clearly. Red flags: no license, cash-only, quotes without a site visit, or prices far below market.