Sherman has 1,954 housing units, the smallest housing stock of the 23 towns in
Fairfield County. We are not going to pretend that makes it a separate
technical universe. What we find here is close to what we find in New
Fairfield, one town south. What really differs is the drive, and we do make
it.
The houses we insulate in Sherman
The median Sherman house was built in 1973, 96.3% of the stock is detached and
95.8% is owner-occupied, on wells and septic throughout. Those figures are
solid. The decade breakdown is not: in a town of under 2,000 units the
survey’s margins are large next to its estimates. The pre-1940 count comes
back as 252 give or take about 140, and it reports zero units built since 2010
— a small-sample artifact, not a finding about the town. Call it a third
of the stock in the 1960s and 70s and two-thirds before 1980, indicative
rather than precise.
In practice Sherman is three kinds of house. At the north end of Candlewood
Lake there are the converted cottages: floor decks over open crawl spaces and
piers, batts long since out of the joist bays, water lines in the same cold
crawl, and roofs framed too shallow for insulation and a vent channel both.
Closed cell under the subfloor with the rim sealed is what lasts, and it
handles the pipes too.
Away from the water, the 1960s to 80s houses on wooded lots are the ordinary
job: loose-fill settled to four or five inches, an open chimney chase, a
garage ceiling, an unsealed rim joist. The post-and-beam farmhouses are the
hard one. No stud cavity worth filling, open framing gaps at the center
chimney on every floor, a fieldstone foundation with an open sill, additions
from every era each framed differently. There the work is air sealing, the
attic floor and the basement — not blind dense-pack.
We seal before we insulate
Insulation slows heat moving through a surface. It does nothing about air
moving through a gap. Pack a leaky attic with cellulose and you have a leaky
attic with cellulose in it — the air still moves, it just moves through
something fluffier.
So the first half of a real job is closing the holes. In a Sherman farmhouse
that is the open framing around the center chimney and the sill on a
fieldstone wall. In a cottage it is the sill over the crawl and the junctions
with the additions. Then we insulate.
If a quote specifies a depth of insulation and never mentions air sealing, it
is half a job.
What insulation costs in Sherman
Most of our projects run between $3,500 and $12,500. A 1970s
house with a clear attic sits near the bottom. A cottage or an antique
farmhouse sits higher for its size, because the labor is in sealing awkward
assemblies rather than blowing material.
Open cell foam runs R-3.9 to R-4.2 per inch. Closed cell runs R-6.9 to R-7.1
per inch and also acts as a vapor retarder, which is why it costs more and is
right in some assemblies and not others. All products are manufactured in the
United States and meet applicable building code and safety standards. After
air sealing and insulating, homeowners typically save 20% or more on heating
and cooling.
Insulation rebates in Sherman
Sherman is Eversource territory, and the program does not
care how small the town is. Incentives run through Energize Connecticut and
the order is not negotiable: a Home Energy Solutions visit
first ($40 homeowner copay since April 2026), insulation
recommended during that visit, the project approved before installation, and a
contractor on the Energize CT Insulation Installers Network.
The rebate is $2.00 per square foot or 75% of the job, whichever is
less, up to $10,000, and $2.50 per square foot up to
$15,000 for income-qualified households and homes in designated
environmental justice communities. Households under 60% of state median income
can qualify for HES-Income Eligible, which covers approved insulation up to
100%.
Attic floors, floored-over attics, above- and below-grade walls, basement and garage ceilings and rim joists qualify. Attic roof decks and rafters do not. Crawl spaces are not on that list either. A crawl space ceiling may or may not be accepted as a floor over unconditioned space depending on how the job is written up, so if the crawl is the work, confirm it with the program before installation rather than after. On a
Sherman cottage that matters: the crawl space ceiling is usually the measure
worth doing, and it is inside the program. See the full Connecticut rebate guide
for the mechanics. The federal Section 25C credit ended for anything placed in
service after 31 December 2025, so there is no federal
insulation credit on a 2026 job.
Code and climate in Sherman
Roughly two-thirds of Sherman predates 1980, so most of it went up before
Connecticut had a meaningful energy code. The current one is the 2022
Connecticut State Building Code, in force since 1 October 2022 and
based on the 2021 IECC; the next edition was expected in July 2026 and has
been delayed. Fairfield County is climate zone 5A — you
will see 4A quoted in places, but that comes from an ASHRAE addendum
Connecticut never adopted.
For new construction and additions the code sets R-60 in the
ceiling, R-30 in wood-framed walls (or R-20 cavity plus R-5
continuous), R-30 in floors, and R-19 or R-15 continuous in basement and crawl
space walls. None of that applies to a house that is already
standing; the code only requires that altering an assembly not leave
less insulation than before. The Department of Energy separately recommends
R-60 for a retrofit attic — guidance, not law.
Common questions about insulation in Sherman
Do you install insulation in Sherman, CT?
Yes. It is a longer drive than most of our Fairfield County work, so
scheduling takes more planning, but the building science is the same as New
Fairfield’s. Lake cottages, 1960s to 80s houses on wooded lots and antique
farmhouses are all regular work.
How much does insulation cost in Sherman?
Most projects run $3,500 to $12,500. A 1970s house with an open attic sits
near the bottom. A farmhouse or a converted cottage sits higher for its square
footage, because the cost is in sealing odd assemblies by hand, not in the
material.
Are there insulation rebates in Sherman?
Yes, through Energize Connecticut. Sherman is Eversource territory. The rebate
is $2.00 per square foot or 75% of the job, whichever is less, capped at
$10,000, and $2.50 per square foot up to $15,000 for income-qualified
households. A Home Energy Solutions visit comes first. Attic roof decks and
rafters are excluded.
Our Sherman farmhouse has no stud cavity to fill. What can you do?
Quite a lot, just not in the walls. A post-and-beam frame with plank or nogged
infill has nothing to dense-pack, and anyone offering to blow it full is
guessing. The gains are the attic floor, the framing at the center chimney,
the fieldstone sill, and the junctions between additions.
Free energy audit in Sherman
We walk the attic, the basement and the crawl space, find where the house is
losing air and heat, and give you a written scope and a price. No charge. If
the right answer is a small air sealing job, we will say so.
Call 914-825-6824 or use the form on this page. Open
8am–8pm, seven days. We work out of New Rochelle, NY with a 100-plus
in-house crew, and we hold manufacturer installer certifications from the
spray foam manufacturers we use.