From Rye and Larchmont to Bedford and Pound Ridge, Cloud9 insulates older homes, additions and new construction across Westchester with closed-cell and open-cell spray foam, dense-pack and blown-in insulation, and mineral wool. Our shop is just over the state line in Norwalk, CT.
★★★★★ 5.0 · 36 Google reviews WC LIC #WC-40826-H26 BPI & OSHA30 certified
Westchester has one of the oldest housing stocks in the region. According to the county’s Affordable Housing Needs Assessment (American Community Survey data), about 31% of the county’s homes were built before 1940 and nearly 58% before 1960. In Larchmont, almost six in ten homes are pre-war; in Scarsdale and Mamaroneck, close to half.
Those homes are beautiful, but most were built long before modern energy codes: balloon-framed walls with little or no insulation, plaster ceilings, knee-wall attics in Tudors and capes, and stone or block foundations that wick moisture.
Westchester also sits in Climate Zone 4A under New York’s energy code, a mixed-humid climate with cold winters and muggy summers. Insulation here has to control moisture as well as heat, so we plan every job around air sealing first, then the right material for each part of the house.
Most of the calls we get from Westchester homeowners start with one of these. Each one has a specific fix.
We insulate single-family homes throughout southern and northern Westchester, from Sound Shore colonials and Tudors to country homes in the northern hills.
Rye Brook & Port Chester · Rye · Harrison & Purchase · Mamaroneck & Larchmont · New Rochelle · Scarsdale · White Plains
Pound Ridge · Lewisboro (South Salem, Cross River & Vista) · Bedford, Bedford Hills & Katonah · North Castle (Armonk & Banksville) · New Castle (Chappaqua) · Mount Kisco
Not on the list? Call (203) 202-1000 and we’ll tell you right away if we can help.
Westchester County requires home improvement contractors to be licensed by its Department of Consumer Protection. Cloud9 Spray Foam holds Westchester County license WC LIC #WC-40826-H26, and you can confirm it anytime with the county’s online license lookup. We’re also licensed in Connecticut (CT LIC #0698762) and fully insured.
We are OSHA30 and BPI certified.
Every project starts with a free, no-pressure inspection. We look at your attic, walls, basement, crawl space and rim joists, explain what we find in plain language, and recommend only the work that will make a real difference.
There’s no single best insulation. The right choice depends on where it goes and how your house is built. This is how we usually match materials to Westchester homes:
Basements, stone and block foundation walls, rim joists, garage ceilings and anywhere moisture is a concern. It packs the most R-value into each inch and doubles as an air and vapor barrier.
Rooflines, cathedral and vaulted ceilings, and interior walls where you want an airtight seal and quieter rooms at a lower cost per inch.
Attic floors and hard-to-reach spaces where blown-in cellulose or fiberglass is the most practical, budget-friendly upgrade.
Soundproofing between floors and around media rooms, plus fire blocking. We often pair it with spray foam.
These photos come from our own job sites. They aren’t stock images.
A few recent homes and rooms our crews insulated, from colonials and country homes to attic additions, sunrooms and finished basements.
We spray only premium foam made by NCFI Polyurethanes, a NASA partner for over four decades. We never economize on the material that goes into your home.
Computer-controlled proportioners keep the two foam components at the exact 1:1 ratio the manufacturer specifies. That ratio is what makes foam cure fully and perform safely on every job.
Our equipment records data from every application, and every customer gets a data-backed report on their installation, so there’s no guesswork about what’s in your walls and roof.
Watch our crew at work, and see how spray foam stops air leaks compared with fiberglass and cellulose.
Your free inspection and written estimate happen before installation day. Once you’ve approved the plan, here’s how the day goes:
Rye, Rye Brook, Port Chester, Harrison, Purchase, Mamaroneck, Larchmont, New Rochelle, Scarsdale, White Plains, Armonk, Banksville, Chappaqua, Mount Kisco, Bedford, Bedford Hills, Katonah, Pound Ridge, South Salem, Cross River and Vista. If you’re not sure whether we cover your address, just call.
Yes. Cloud9 Spray Foam holds Westchester County license WC LIC #WC-40826-H26, which you can verify with the county’s online license lookup. We’re also licensed in Connecticut (CT LIC #0698762) and fully insured.
Yes. We use a system that only requires opening part of the wall, and in most cases just small sections of plaster or sheetrock. We’ll connect you with a drywall company we work with and coordinate the schedule. They open the walls or floors before we arrive, we remove the old fiberglass and fill the cavities with spray foam, and they come back to restore the openings.
Yes, when it’s specified correctly. Westchester’s mixed-humid climate makes moisture control important, so we typically use closed-cell foam on foundation walls and rim joists, and choose open- or closed-cell for rooflines based on how the roof is built.
Yes, and they’re some of our favorite projects. New additions often feel colder or hotter than the rest of the house. Sealing them with spray foam pulls them into the home’s thermal envelope. We also insulate finished basements, bonus rooms and new custom homes before drywall.
Most homes take 1 to 2 days, depending on scope. We’ll confirm the schedule when we inspect.
Yes. Plan to be out of the house while we spray and for 24 hours after, while the foam cures and the rooms air out. We’ll go over the details with you ahead of time.
Tell us about your home and we’ll schedule a no-charge inspection, with an honest assessment and a clear plan whether the issue is high bills, cold rooms, moisture, a new addition or walls that are open for a renovation.
Closed- and open-cell spray foam · Attics & rooflines · Basements, crawl spaces & rim joists · Walls (open or closed) · Garages & bonus rooms · Soundproofing
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