Only 45.9% of Manchester’s 26,465 housing units are detached houses, and 55.0% of occupied homes are owner-occupied. The rest of the stock is spread across every building size: 7.9% attached townhouses, 9.8% in two-unit buildings, 7.5% in three- and four-unit buildings, 8.3% in buildings of five to nine, 7.4% in buildings of ten to nineteen and 8.4% in buildings of fifty or more. In Manchester, who owns the envelope is the first question.
The median unit dates from 1963. 19.9% of the stock predates 1940, 26.5% is from the 1940s and 50s, 22.5% from the 1960s and 70s, 21.6% from the 1980s and 90s and 9.4% from 2000 on; 69.0% was built before 1980. Gas heats 54.9% of occupied homes, oil 24.7% and electricity 15.7%.
The houses we insulate in Manchester
Manchester’s rivers and brooks powered paper, lumber and textile mills from early on, and the town grew as an industrial center. It kept a large multi-family stock: 2,596 units in two-unit buildings and 1,989 in three- and four-unit buildings. An up-and-down two-family of that period is one building from cellar to roof: a shared stair hall running the full height, one apartment stacked on the other with an open floor cavity between them, a shallow attic or low-slope roof over the top unit, and, in the older ones, balloon-framed walls that carry cellar air straight to the attic. We scope it as one building, because sealing one floor while the stair and the floor cavity stay open does not hold.
The 1940s built 12.3% of Manchester and the 1950s another 14.3%. The house of those decades is often a cape, sometimes with dormers. The cape leaks at the knee wall, where the bedroom’s side wall has insulation facing the room and nothing behind it; underneath, the floor joists run out to the eave with nothing blocking them, and the dormer’s side walls are thin framing exposed to the same cold attic.
The 1960s and 70s, 22.5%, and the 1980s and 90s, 21.6%, brought ranches, raised ranches, splits and colonials. The raised ranch loses heat at the rim joist and through the garage ceiling below the bedrooms. The townhouse loses it through the party wall where it runs up into a shared attic. In a building of five or more units the attic, the roof and the exterior walls usually belong to an association or a landlord, and the Energize CT program sends buildings of that size to its Multifamily Initiative.
24.7% of homes heat with oil and 15.7% with electricity. An oil-heated two-family pays for its leaks by the delivery, an electric-heated apartment at the meter.
The Cheney district and the mill-era houses
In 1838 the Cheney family started what became the world’s largest silk mill. The family eventually employed a quarter of Manchester’s residents and recruited immigrants to work in the mills, and Manchester was a center of the American silk industry from the late 19th century to the mid-20th. The mills, the owners’ houses and the workers’ homes are now the Cheney Brothers Historic District, a National Historic Landmark, and the mills themselves have been refurbished as apartments. Older still are the Hilliard Mills, founded around 1780, the oldest woolen mill site in the country.
The 5,263 homes built before 1940 are where Manchester loses the most heat per house. A mill-era house usually has plaster walls with empty or partly filled cavities, an attic with a few inches of old loose fill, a stone or brick foundation with a bare sill, and wiring that needs to be checked for knob-and-tube before anything covers it. In an owner’s house or a worker’s home inside the historic district, the exterior is the house’s character, so we work from inside where we can: the attic floor, the knee walls and slopes, the cellar and rim, and the walls from the interior if they are worth doing.
In the mill buildings converted to apartments, the masonry walls and the roof belong to the building rather than to any one unit. Anything that touches them is the owner’s or the association’s decision.
We seal before we insulate
Batts and blown insulation slow heat through a surface, but air carries heat through the gaps between those surfaces, and it pays no attention to how thick the insulation is.
In a Manchester cape with dormers the order is set. Block the joist bays under each knee wall at the eave line, put an air barrier on the attic side of the knee walls, and close the dormer side walls where they open into the knee-wall attic. Seal the chimney and plumbing chases, the bath fan and the light boxes at the flat ceiling, and baffle the slopes so the eaves stay vented. Then insulate the knee walls, the slopes and the flat, and finish with the rim joist in the basement.
If a quote specifies a depth of insulation and never mentions air sealing, it is half a job.
What insulation costs in Manchester
Most of our projects run between $3,500 and $12,500. A two-family or three-family is priced as one building, and the drivers are the roof area over the top unit, the stair hall and the length of cellar rim. A 1940s or 50s cape moves with the feet of knee wall and the number of dormers. A townhouse is usually the party wall and the attic above it, if the owner controls them. The spray foam cost guide covers foam pricing.
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 why it is right in some assemblies and unnecessary in others. All products are manufactured in the United States and meet applicable building code and safety standards. ENERGY STAR says sealing air leaks and adding insulation can save up to 10% on annual energy bills.
Insulation rebates in Manchester
Manchester’s electricity comes from Eversource and its gas from Connecticut Natural Gas (CNG). Home Energy Solutions is open to customers of Eversource, United Illuminating, Connecticut Natural Gas and Southern Connecticut Gas, whatever fuel heats the house. It is written for homes of one to four units, so it covers Manchester’s two-, three- and four-families; a renter needs the landlord’s approval, and a home that had these services in the last six years is not eligible again yet.
A Home Energy Solutions visit has a $40 copay, effective 1 April 2026. The authorized contractor runs health and safety tests, a blower-door test to pinpoint drafts and air leaks, and a duct test where there is forced hot air or central air conditioning; may install water-saving measures; air seals at no cost for up to seven hours, with a $10 hourly fee after that; and leaves a report with recommended upgrades and rebate and financing information. A two- to four-unit building always takes two visits. There may be a waiting list, and the program is subject to available funding.
The 2026 Energize CT insulation rebate: up to $2.00 per square foot or 75 percent of the total cost, whichever is less, up to a maximum of $10,000, for attic floors, floored-over attics, walls, basement and garage ceilings and rim joists. The insulation must be recommended during a Home Energy Solutions visit, the project approved before installation, and the installation done by an approved contractor from the Energize CT Insulation Installers Network. For an attic floor, the existing insulation cannot exceed R-19 and the final must reach R-49, or R-38 where R-49 is not structurally practicable. Foam on the underside of a roof deck is not on the list, so ask the program before counting on a rebate for it.
Household income can move a home into a better tier. On Energize CT’s 2026–2027 figures, a two-person household with $63,703 or less is Income Eligible, with a no-cost visit and up to 100 percent coverage of insulation costs; one with $63,704 to $84,939 is in Enhanced Incentives, with a no-cost visit and up to $2.50 per square foot, a range that varies by zip code. Ask which tier you are in before you pay a copay. Parts of Manchester are designated environmental justice communities; the state’s map shows whether a specific address qualifies for up to $2.50 per square foot, up to $15,000.
The insulation rebate is paid only when a contractor in the Energize CT Insulation Installers Network does the work. Ask any installer, including us, whether they are in that network before you sign. If the rebate matters most, start with the Home Energy Solutions visit and a network contractor; if you want foam where the rebate does not reach, or would rather not wait, we will price the job on its own merits.
The Connecticut Green Bank’s Smart-E Loan finances insulation for owner-occupied buildings of one to four units, with no money down and up to $50,000, at 6.99% for 5, 7 or 10 years, 7.49% for 12 and 7.99% for 15 where the lender offers that term. It goes through the Green Bank’s participating contractors, so ask whether yours participates. There is no federal tax credit for insulation installed in 2026; Section 25C ended for anything placed in service after 31 December 2025. See Connecticut insulation rebates in full.
Code and climate in Manchester
69.0% of Manchester’s housing was built before 1980. Manchester, like all of Connecticut, is in climate zone 5A.
New houses and additions follow the 2022 Connecticut State Building Code, the 2021 IECC with state amendments, for applications filed since 1 October 2022. The new-home targets: ceilings R-60, with R-49 counting where it runs at full uncompressed height over the wall top plate at the eaves; walls R-30 in the cavity, R-20 plus R-5 continuous, R-13 plus R-10 continuous or R-20 continuous; floors R-30; basement walls R-15 continuous, R-19 in the cavity or R-13 plus R-5 continuous; windows U-0.30. A new Connecticut home must pass a blower-door test at 3.0 air changes per hour at 50 pascals on the prescriptive path, never worse than 5.0. Connecticut’s next code, which follows the 2024 IECC, is adopted in draft, and its effective date has been delayed.
Common questions about insulation in Manchester
Do you install insulation in Manchester, CT?
Yes: the pre-1940 houses in and around the Cheney Brothers Historic District, the two-, three- and four-family buildings, the 1940s and 50s capes, and the raised ranches, colonials and townhouses built since. Two- to four-family buildings are scoped as one building, cellar to roof, because the stair hall and the floor cavity are shared with the other apartment.
How much does insulation cost in Manchester?
Most projects run $3,500 to $12,500. A two- or three-family is priced as one building, on the roof area over the top unit, the stair hall and the cellar rim. A cape moves with the length of knee wall and the dormers. A townhouse is usually the party wall and the attic above it. A pre-1940 house worked from inside, as in the historic district, takes more labor than one done from the attic and cellar. Every job gets a written scope and price after a free walk-through.
Are there insulation rebates in Manchester?
Yes, through Energize Connecticut. Manchester is Eversource for electricity and Connecticut Natural Gas for gas, and either account opens a Home Energy Solutions visit with a $40 copay at the standard tier. The 2026 rebate pays up to $2.00 per square foot or 75 percent of the cost, to $10,000, once the work is recommended at that visit, approved first and installed by a network contractor. Income-qualified households and parts of town designated environmental justice communities can get more. There is no federal tax credit for 2026.
We rent an apartment in a Manchester two-family. Can we get it insulated?
The building’s owner has to be part of it. The attic, the walls, the stair hall and the cellar belong to the landlord, and in a two-family they are shared with the other apartment, so the work only makes sense as one building. On the program side, a renter needs the landlord’s approval for Home Energy Solutions, and a two-unit building always takes two visits. Ask your landlord to call us, or to start with the program, and we will scope the whole building with them.
Free estimate in Manchester
Our free estimate is a walk-through, not a Home Energy Solutions visit, and it does not qualify anyone for a rebate. In a two-family we look at the attic or roof over the top unit, the stair hall and the cellar rim; in a cape, the knee-wall attics and dormers; in a townhouse, the party wall and whatever attic the owner controls; in a pre-1940 house, the wiring we can see and the walls. Then you get a written scope and price. There is no charge and no obligation.
Call 914-825-6824 or write to us through the contact form. Open seven days, 8am–8pm. We are a New Rochelle, NY company with a 100-plus in-house crew that never subcontracts.
Learn more
- Insulation contractors across Hartford County
- Insulation in East Hartford
- Insulation in Glastonbury
- Insulation in South Windsor
- Insulating older homes
- What happens during an energy audit
- Open cell and closed cell spray foam compared