Top-Rated Insulation Installers in New Bedford, MA

3 local companies ranked by 77 Google reviews. Free to compare, no sign-up.

Ratings collected September 2026 · Page updated September 30, 2026

3Companies
77Google reviews
4.9★Average rating
Sep 2026Data collected
Ranked by Google reviewsNever paid forFree to compare

Short answer: The top-rated insulation installers in New Bedford are Southern Mass Spray Foam Inc. (4.9★, 32 reviews), JM of New Bedford a Weatherization Co. (4.9★, 26 reviews), Air Tight Insulators LLC (4.9★, 19 reviews).

Insulation installers in New Bedford, ranked 3 listed

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  1. 1
    Southern Mass Spray Foam Inc.Top pickMost reviews
    4.9 (32 Google reviews)
    1478 Acushnet Ave, New Bedford, MA 02746
    Call (508) 719-9976WebsiteGoogle reviewsDirections
  2. 2
    JM of New Bedford a Weatherization Co.Top pickAlso installs solar
    4.9 (26 Google reviews)
    423 Coggeshall St, New Bedford, MA 02746
    Call (508) 992-5770WebsiteGoogle reviewsProfileDirections
  3. 3
    Air Tight Insulators LLCTop pick
    4.9 (19 Google reviews)
    137 John Vertente Blvd, New Bedford, MA 02745
    Google reviewsDirections

Together these 3 companies average 4.9★ across 77 reviews. Southern Mass Spray Foam Inc. has the most reviews (32).

Ranked by Google rating weighted by review count, collected September 2026. Rankings are never paid for. How we rank and how we make money.

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What a insulation costs in New Bedford

Typical installed priceVaries by area

Price depends on which areas you insulate (attic, walls, basement) and how much air sealing is needed. Ask each company for a price per area and the R-value you end up with, so quotes are easy to compare.

Rebates open in New BedfordNone confirmed right now

Financing or future programs may still help. Check the rebate page before you sign.

Rebates: our verified program data, checked monthly. Always confirm the exact amount for your home.

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Why insulation matters in New Bedford

In New Bedford, the average January low is -3°C (27°F), colder than 37% of the 123 cities we track. Sealing air leaks and topping up the attic usually pays back fastest here. Basement walls and rim joists are often the next biggest heat loss in older homes.

Most rebate programs pay only after an energy assessment, and some need one before the work too. Book it first.

Source: Open-Meteo historical weather data, 2015-2024.

Before you hire a insulation installer

  1. Ask whether they will air-seal before insulating, and what they will seal (attic hatch, pot lights, pipes, top plates).
  2. Ask for the R-value before and after for each area, and the material and depth they will install.
  3. Ask whether your rebate needs an energy assessment before and after the work, and who books it.
  4. Ask how they handle ventilation and any old insulation that could contain vermiculite (asbestos risk).

Before you call anyone, check what insulation rebates you can get in New Bedford. Many programs require approval or a registered contractor before work starts.

Planning more upgrades? See the top-rated heat pump installers, solar installers, home battery installers in New Bedford.

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