Insulation contractor in Sandwich, New Hampshire

What we see in Sandwich homes

The typical Sandwich home was built between 1950 and 1980, which usually means R-11 fiberglass batts in the walls, a thin layer of batts on the attic floor, no air sealing anywhere, and a rim joist that was never insulated. Ranches, split-levels and garrison colonials from these decades are the bread and butter of our NHSaves work: air seal and top up the attic, foam the rim joist, and the house feels like a different place.

Heating in Sandwich is split between oil, propane, gas, electricity and wood, so we start every job by looking at your actual bills and fuel before recommending anything. A notable share of homes, around 18%, heat with electricity, usually baseboard. Those homes see the fastest payback from a mini-split heat pump, which delivers two to three times the heat per kilowatt-hour. Around 28% heat primarily with wood or pellets. A tighter house means fewer cords a winter, and a heat pump can take the shoulder seasons so the stove runs only when it is truly cold.

Housing figures: U.S. Census Bureau, American Community Survey 2020 to 2024 five-year estimates for Sandwich; heating fuel shares are for owner-occupied homes.

NHSaves rebates in Sandwich

Most of Sandwich is served by Eversource for electricity and none for natural gas. All of them are NHSaves utilities. If you heat with natural gas your Home Energy Performance rebate comes through none; if you heat with anything else it comes through Eversource. Parts of town are served by another electric utility (the NH Electric Co-op); either way the program applies, and we confirm your utility from your bill.

On most Home Energy Performance projects the program pays 100% of air sealing and 75% of insulation, up to $6,000 per home, and your share can go on a 0% or 2% program loan. We assess the house, model it, file with the utility and take the rebate off the invoice. How the program works.

How much fuel a Sandwich home needs to use to qualify

Fuel	Utility	Enrollment line	Qualifies outright
Heating oil	Eversource	650 gallons	975 gallons
Propane	Eversource	986 gallons	1,479 gallons
Natural gas	none	900 therms	1,351 therms

For a 1,800 sq ft home in Sandwich at 8,337 heating degree days (estimated from the nearest weather station). Yearly fuel use at or above the enrollment line gets the utility’s enrollment form; above the higher figure the home qualifies with any utility. A wood or pellet stove counts toward the total. Pre-screen only: the utility’s calculator and the assessment decide.

Services in Sandwich

• Attic insulation and air sealing: blower-door directed sealing of the attic floor, then blown cellulose to R-38 or better, with baffles and an insulated hatch.
• Dense-pack wall insulation for the empty cavities in older Sandwich capes, colonials and farmhouses.
• Basement, rim joist and crawl space: closed-cell foam at the rim, sealed vapor barriers in crawl spaces.
• Cold-climate heat pumps and ductless mini-splits, sized for the house after the envelope work.
• NHSaves rebates filed with your utility and taken off the invoice.

Why Sandwich homeowners call us

• Family owned and operated; our own crews, no subcontractors
• BPI-certified building analysts test every house before and after
• OSHA 30 trained managers and OSHA 10 trained crews
• NHSaves paperwork, permits and inspections handled for you
• Written scope and price before anything is scheduled

Questions from Sandwich homeowners

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