Attic Insulation Cost in New Hampshire:
R-Values, Air Sealing & Quotes
Average attic insulation cost in New Hampshire: $1,300–$3,200. Recommended R-value: R-49 to R-60 (attic). Compare air sealing, ventilation, warranty, and rebate assumptions.
Also Compare on Angi
Find top-rated Home Remodeling pros in New Hampshire
Read reviews, compare quotes, and hire with confidence.
$1,300–$3,200
Avg. Attic Project Cost
$350–$700/yr
Annual Energy Savings
R-49 to R-60 (attic)
Recommended R-Value
2–5 years
Typical Payback
Best Insulation Approach for New Hampshire
Recommended: Comprehensive air sealing + attic blown-in to R-60
New Hampshire's cold winters make insulation one of the best investments. Eversource NH and Liberty Utilities offer rebates. Many older NH homes have uninsulated or under-insulated attics with significant air leakage.
| Project Type | Typical Cost | Operating Impact | Payback |
|---|---|---|---|
| Attic blown-in (R-49) | $1,000–$2,800 | $200–$450/yr | 3–6 yrs |
| Air sealing package | $400–$1,200 | $150–$350/yr | 1–4 yrs |
| Rim joist spray foam | $400–$900 | $100–$200/yr | 2–5 yrs |
| Wall insulation (existing) | $1,500–$4,000 | $150–$350/yr | 5–15 yrs |
| Crawl space encapsulation | $3,000–$7,000 | $200–$400/yr | 8–20 yrs |
New Hampshire Insulation Rebates & Tax Credits
Current insulation rebate eligibility should be verified
Eversource NH Home Energy Audit & Rebates
Liberty Utilities weatherization programs
Federal credit rules changed after 2025; verify current IRS rules
Programs change often. Ask each insulation contractor to confirm current rebate and tax credit rules before you sign.
Insulation Quotes by City in New Hampshire
Compare Insulation Quotes in New Hampshire
Request local quote options and compare air sealing, final R-value, material type, ventilation, warranty, and rebate assumptions.