Business Details
50+ Years
experience
Expert Insulation & Weatherization Since 1951
JM of New Bedford has been a family-owned leader in weatherization services since 1951, founded by Elwell Perry Sr. with a focus on fireproof mineral wool insulation. Over 70 years, we expanded to offer attic, basement, and sidewall insulation, air sealing, and energy audits for residential and commercial clients. Our BPI-certified team adheres to strict standards, holding EPA Lead-Safe and Massachusetts HIC certifications while serving Southeastern Massachusetts, Cape Cod, and beyond.We partner with Mass Save to deliver rebate-eligible projects, combining generational expertise with modern efficiency solutions. Customer trust remains central, demonstrated through free estimates and meticulous attention to detail on every job, no matter the size. Our reputation for professionalism and quality craftsmanship has earned us thousands of satisfied clients across over 11,000 completed projects.
Services
Attic Insulation
Basement Insulation
Sidewall Insulation
Air Sealing
Energy Audits
Weatherization
Roofing
Rebate Assistance
Details
- Year established: 1951
Highlights and features
- Family-owned with 70+ years of local experience
- Mass Save program partner for energy rebates
- BPI-certified professionals for energy audits
- EPA Lead-Safe certified contractors
- Serving 4 states with tailored weatherization solutions
Associations and certifications
- BPI Certified
- EPA Lead-Safe Certified Firm
What people say
Kind, professional crew
Thoroughness and attention to detail
Pride in workmanship
Clear communication
Exceeded expectations
Services
Attic Insulation
Our attic insulation services use high-density mineral wool to improve thermal efficiency and reduce energy costs by up to 30%. Properly insulated attics prevent heat loss in winter and heat gain in summer. With over 70 years of experience, we ensure optimal R-values for New England's climate.
Air Sealing
We identify and seal air leaks around windows, doors, and structural gaps using advanced foaming techniques. This creates an effective thermal barrier, reducing drafts and improving HVAC efficiency. Our process includes pre- and post-inspection blower door tests to verify results.
Energy Audits
As Mass Save partners, we conduct comprehensive energy audits to assess insulation levels, air leakage, and appliance efficiency. Our BPI-certified technicians use diagnostic tools to create customized efficiency improvement plans, qualifying homeowners for utility rebates and incentives.
Sidewall Insulation
We install dense-packed mineral wool in exterior walls to eliminate cold spots and reduce energy consumption. This service improves indoor comfort while protecting against moisture infiltration. Our technicians specialize in both new construction and retrofit applications for historic and modern homes.
Basement Insulation
Our basement insulation services focus on sealing the building envelope to prevent cold air infiltration and moisture problems. We insulate foundation walls and band joists using fire-resistant materials, improving comfort in living spaces above and reducing heating costs by up to 20%.
Questions
What areas do you serve?
We serve Southeastern Massachusetts, Cape Cod, Greater Boston, and Rhode Island with insulation and weatherization services.
Do you offer free estimates?
Yes, we provide free estimates for all insulation and weatherization projects, with no obligation to proceed.
Are you certified for energy audits?
Yes, we're BPI-certified and Mass Save partners, qualified to conduct energy audits and recommend efficiency improvements.
How long have you been in business?
Since 1951, we've provided insulation services across three generations of family ownership and expertise.
What certifications do you hold?
We maintain EPA Lead-Safe certification, Massachusetts HIC licensing, and BPI building analyst credentials for energy efficiency work.
Do you qualify for utility rebates?
Yes, as Mass Save partners, we help homeowners qualify for up to 75% rebates on insulation and air sealing projects.
Reviews (6)
Matthew Francisco
Feb 08, 2022
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JM has done work on several of my properties and every project has been nothing less than top notch. They are in their 3rd generation of family management and some of their staff have been there for decades! Their attentiveness and work ethic are one of the biggest reasons they are the best in the area. Matt Perry is always willing to swing by to look over the job and nearly everything I asked could be done was addressed by his crew members. Plus using the 75% off Mass Save Insulation incentive was awesome as the jobs nearly paid for itself in less than 2 years.
Jennifer Ferreira
Jul 24, 2021
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The insulation of our attic is above and beyond our expectations. All three JM employees did an amazing job! I highly recommend them. The draft sealing of our doors has not only eliminated the drafts it's reduced the traffic noise!
William Trial
Apr 10, 2021
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JM Insulation is easy the best weatherization company in Massachusetts. Matt's communication with me throughout the process was impeccable and did they did a fantastic job insulating my property. I would definitely hire them again if given the chance. No more draftiness in my house. Can't wait to see how much my heating bill will decrease!
Brian Hill
Feb 20, 2021
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I had a great experience with JM of New Bedford. I bought a new house and they did top to bottom insulation and gave great advice and work on my roof. Very professional and always had good communication. You can't beat the prices either. Absolutely using them for my addition.
Pat Wessling
Nov 10, 2020
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An amazing group of laborers work for this establishment! I cannot recommend them more highly! The owner called me to check on how the job was going! Outstanding customer service! I know where I will go if I ever leave this house and need insulation! With the job they did I will never need to update the insulation!
Richard Swenson
Jan 04, 2020
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Very pleased. JM did work in my attic and crawl space that was identified by a Mass Save audit. Top quality work and professionalism. I highly recommend.
