Spray Foam Insulation in Darien
Darien is a coastal Fairfield County town of mid-century colonials and older shoreline homes, where families choose quality and expect it to last. The houses are handsome and the winters are real, which is exactly where good insulation earns its keep.

Insulation built for Darien homes
Sebastian Spray Foam is a Brookfield, CT insulation contractor working in Darien 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 Darien homes. Homes around Darien 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 Darien homes are built like
Much of Darien was built between the 1920s and the 1960s, with framed walls, vented attics, and the drafty rim joists common to homes of that era. Renovations often reveal thin or settled insulation that no longer performs.
Working in Darien
The shoreline neighborhoods near Long Island Sound sit low and take the wind off the water, so air-sealing the attic and rim joists makes the biggest difference in how these homes hold their heat.
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 Darien homeowners
Do you work in Darien?
Yes. Sebastian Spray Foam is based on Federal Road in Brookfield, CT and works across Fairfield County, including Darien and nearby Greenwich, New Canaan and Westport. Call (203) 546-7800 or request an estimate and we will set up an in-home assessment.
Why are the floors in Darien homes near the water so cold?
Cold floors and musty air usually start under the house. In a vented crawl space or at an open rim joist, damp outside air moves up into the living space. Closed-cell spray foam on the crawl space walls and rim joists blocks ground moisture and the drafts that come with it, which is why it is the material we specify there.
What happens when I request an estimate in Darien?
First, an in-home assessment: we inspect your attic, walls or crawl space and find where the house is leaking energy. In Darien that usually means the crawl space and rim joists first, for the moisture, and then the attic. Then a clear quote, with the right material for each space, the same way we quote in Greenwich, New Canaan and Westport. Then the install: our own crew seals the envelope, protects your home throughout, and leaves it spotless, anywhere in Fairfield County.
Serving Darien & nearby
No-obligation assessments across Fairfield County. We serve Darien and the towns around it.
Request an estimate(203) 546-7800Commercial project in Darien?
We handle offices, retail, warehouses, and new construction across Fairfield County, with a schedule you can build around.
See commercial insulationNearby 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.
