Spray Foam Insulation in Danbury
From older multi-families near downtown to modern builds on the outskirts, we seal Danbury homes tight against the cold.

Insulation built for Danbury homes
Sebastian Spray Foam is a Brookfield, CT insulation contractor working in Danbury and across Fairfield County. We install open- and closed-cell spray foam, attic, crawl space and rim joist insulation, air sealing, blown cellulose and fiberglass, and batt insulation in Danbury homes, and commercial insulation for the buildings along its business corridors. Homes around Danbury lose the most energy where you can't see it, the attic, the rim joists, and the gaps inside finished walls. Our licensed, insured crew seals those leaks so your home holds its temperature through every Connecticut season, with lower bills to match.
What Danbury homes are built like
Danbury has the widest range of housing in the area: multi-family houses and pre-1940 homes around downtown and Wooster Square, mid-century capes and ranches in the neighborhoods behind them, and newer colonials and subdivisions on the outskirts toward the Bethel line. The older stock leaks through walls with little or no insulation, unsealed attics and open basements; the newer homes lose heat through bonus rooms and rim joists.
Working in Danbury
Danbury borders Brookfield, where our shop is. Multi-unit conversions near downtown and additions in the outer neighborhoods both come down to the same two jobs: seal the attic and the rim joists, then insulate to the way the house was built.
In the trade since 2017
Nine years of experience, a Brookfield family business, not a call center.
Licensed & insured
CT HIC.0660083, licensed in Westchester & Putnam Counties NY, and fully insured.
A crew, not a subcontractor
Fifteen people and four rigs, so the work is ours from start to finish.
Spotless job sites
We mask, protect, and leave it cleaner than we found it.
Questions from Danbury homeowners
Do you work in Danbury?
Yes. Sebastian Spray Foam is based on Federal Road in Brookfield, CT and works across Fairfield County, including Danbury and nearby Brookfield, Bethel and New Fairfield. Call (203) 546-7800 or request an estimate and we will set up an in-home assessment.
Can you insulate an older Danbury home without opening the walls?
Often, yes. Dense-packed cellulose fills closed walls without opening them, and the attic and rim joists can be air-sealed and insulated from inside. Where a renovation already has the walls open, spray foam seals the cavities before the finishes go back. We look at the house first and recommend the material that fits it.
What happens when I request an estimate in Danbury?
First, an in-home assessment: we inspect your attic, walls or crawl space and find where the house is leaking energy. In Danbury that usually means the attic, the basement or cellar, and the closed walls, worked from the inside so the original detail stays put. Then a clear quote, with the right material for each space, the same way we quote in Brookfield, Bethel and New Fairfield. Then the install: our own crew seals the envelope, protects your home throughout, and leaves it spotless, anywhere in Fairfield County.
Serving Danbury & nearby
Free assessments across Fairfield County. We serve Danbury and the towns around it.
Request an estimate(203) 546-7800Commercial project in Danbury?
We handle offices, retail, warehouses, and new construction across Fairfield County, with a schedule you can build around.
Commercial insulation in DanburyNearby areas
We leave it cleaner than we found it.
We show up when we say we will.
Done properly the first time.
Request an estimate and we'll assess your home or building, specify the right material for each space, and give you a clear plan. On time, and spotless when we leave.
