Insulation contractor in Grantham, New Hampshire
Looking for an insulation company near you in Grantham? We are a family-owned NHSaves® participating contractor with BPI-certified staff, doing attic and wall insulation, air sealing and cold-climate heat pumps across Sullivan County. Most of the insulation work is paid for by your utility's program.
What we see in Grantham homes
The typical Grantham home dates from after 1980, so it has some insulation already. What it usually lacks is air sealing: recessed lights, attic hatches, duct chases and top plates leak warm air into the attic, and the attic itself is often below today's R-49 to R-60 standard. Newer homes also tend to have ductwork and electric or propane heat, which makes them strong candidates for a cold-climate heat pump.
About 92% of owner-occupied homes in Grantham heat with oil or propane, the most expensive fuels in New England per unit of heat. That is why air sealing and insulation pay back so quickly here, and why a cold-climate heat pump is often the next step: it can carry most of the season at a fraction of the cost of delivered fuel.
Housing figures: U.S. Census Bureau, American Community Survey 2020 to 2024 five-year estimates for Grantham; heating fuel shares are for owner-occupied homes.
NHSaves rebates in Grantham
Most of Grantham 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.
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 Grantham home needs to use to qualify
| Fuel | Utility | Enrollment line | Qualifies outright |
|---|---|---|---|
| Heating oil | Eversource | 629 gallons | 943 gallons |
| Propane | Eversource | 954 gallons | 1,430 gallons |
| Natural gas | none | 871 therms | 1,306 therms |
For a 1,800 sq ft home in Grantham at 8,064 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.
Check your own Grantham home
Your ZIP code is filled in. Add your heating fuel and the heated square feet; add last year's fuel for a score, and tick the box if a wood or pellet stove helps heat the house.
Services in Grantham
- 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 Grantham 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 Grantham 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 Grantham homeowners
How much does insulation cost in Grantham, NH?
It depends on the house, but for a typical Grantham home the NHSaves program pays 100% of the air sealing and 75% of the insulation, up to $6,000, so most homeowners pay a quarter of the insulation cost and nothing for the air sealing. We give you the exact figure in writing after the assessment, and 0% or 2% financing is available for your share.
Do you serve all of Grantham?
Yes, every neighborhood in Grantham (03753) and the surrounding towns in Sullivan County.
Which utility runs the NHSaves rebate in Grantham?
Most of Grantham 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.
Can you install a heat pump in my Grantham home?
Yes. We install cold-climate ductless mini-splits and ducted heat pumps across Grantham and Sullivan County, sized from a load calculation after the insulation work, with the Eversource heat pump rebate filed for you.
Does a wood stove count toward qualifying in Grantham?
Yes. The program adds up every fuel the house burns, so the cords or pellet tons you go through in Grantham winters count alongside oil or propane. Many homes here qualify once the stove is included.
Do you install heat pumps in Grantham?
Yes. Cold-climate ductless and ducted heat pumps for Grantham homes, sized after the insulation work so the system is not oversized, with your utility's heat pump rebate filed for you.
Nearby towns we serve
Ready to warm up your Grantham home?
Book a home energy assessment and find out what NHSaves will cover on your house.