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  • Home
  • Residential
    • Ice Dams
    • Comfort/Drafts
    • Indoor Air Quality & Mold
      • Young Living Essential Oils
    • Sound
    • Hot and Humid Homes
  • Commercial
    • Product & Solutions Catalog
  • New Homes/Additions
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    • Letter from Our Founder
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Call Now for an Energy-Efficiency Consultation
978-266-1122

Project Gallery

Watch a Timelapse of a Hot Roof Installation With Intello and Igloo Cellulose Insulation

Here are some recent insulation projects we’ve completed.

1_1 2 1_3 1_4 5 6 7 8 9 10 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Open-Blow-with-Raised-Platform Wall-Fiberglass-Removal Intello-Densepack Insulation-Removal Intello-Basement HVAC-in-conditioned-space Hot-Roof-Peak George-Jag-AC-bill-comparison Fiberglass-Filter exterior-wall-densepack cathedral-densepack2 concord-attic-densepack attic-densepack2 Crawlspace-Ceiling-Densepack attic-densepack cathedral-densepack chris-pro Matlick team 5IMG_3507 905638_950804888315119_4239540100346554080_o Insulated-Attic popup10 popup11 Waters Electric Bill After Insulating 1 3 4 6-(1) popup31.png Custom Hatch 1493433_1091345564261050_9198305687089501949_o AAEAAQAAAAAAAAVKAAAAJDA4MzQ5YTZlLWExN2MtNDY0ZC05ZGE4LTg0ODE4OTcxMTZhYg 12828517_1088043597924580_3520234687470056189_o popup12.jpg popup13.jpg popup14.jpg popup22.jpg popup23.jpg popup18.jpg popup15.jpg popup16.jpg popup17.jpg popup19.jpg popup29.jpg popup20.jpg popup21.jpg popup5.jpg popup7.jpg popup27.jpg Custom
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Accreditation and Awards

  • Angies List Logo
  • Energy Star Logo
  • National Association of Realtors Logo
  • Appraisal Institute
  • Massachusetts Department of Energy Resources
  • U.S. Department of Energy
  • Angies List 2013 Super Service Award
  • Angies List 2014 Super Service Award
  • Lead Safe
  • Rotary International

Client Testimonials

Our customers speak for themselves — read some of our recent reviews!

  • We thought Dolphin Insulation was great! We had little to no insulation in a home we recently bought. Losing heat and central air running constant was an issue that they corrected for us. We are seeing a huge difference this week with the central AC. Thank you again!!
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    Kelly Monahan Avatar
    Kelly Monahan
    6/22/2021
  • Chris and his team were great. Did fast, efficient work, cleaned up after themselves and were unobtrusive to a family working from home. A great experience!
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    David Wrangham Avatar
    David Wrangham
    8/29/2021
  • Dolphin Insulation replaced the insulation in our 2nd floor/attic. We are very pleased with the result. Ryan, the on-site project foreman took the time to explain the work as it progressed so that our questions were answered daily. He and his team were friendly, knowledgeable, and careful with our home. We would highly recommend Dolphin if you are serious about insulating your home.
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    John Hickey Avatar
    John Hickey
    2/16/2022
  • We used Dolphin Insulation for multiple weatherization items around our house including air sealing, blowing cellulose insulation, etc. From the first contact to schedule the job, to their professionalism, to the quality of their work, Dolphin as a whole is a fantastic group. Highly recommended.
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    Eric Robert Avatar
    Eric Robert
    3/22/2021
  • So many wonderful things to say about this company! From the first time I called to see about scheduling I was blown away with the helpfulness of the individual I spoke with. She was anticipated my needs, spoken knowledgeably about our job and was even able to get us onto the schedule in the timeframe that worked for us! Once the crews showed up to do the job the service got even better! They were professional, checked in to make sure we were updated on the project/answered all our questions, and very clean in the job. They finished when they said they would and actually provided us a revised quote once they discovered part of our house was insulated from a precious addition. Would recommend this company time and time again- you won’t be sorry!
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    Katelin Jeray Avatar
    Katelin Jeray
    5/22/2021
  • I was and still am very impressed and happy about the insulation installed in my attic. I can feel the warm air staying in and seeing the snow on roof not melting away so fast as the attic is well insulated. I would highly recommend Dolphin insulation to everybody.
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    Glen DeRosa Avatar
    Glen DeRosa
    1/22/2021
  • I hired Dolphin to make my poorly insulated older home more energy efficient. I am so glad I did! They did an excellent job! Both technicians, Chris and Dustin, performed all the work and did an impressive job! They arrived on time, super professional, knowledgeable, courteous and they took time to ensure my home was not a mess! I couldn’t be happier! Thank you Dolphin, Chris and Dustin!
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    George Pappas Avatar
    George Pappas
    5/10/2021
Read More Testimonials

Blog & News

  • You Don’t Need to Freeze to Offset Energy Costs
    February 15, 2025
    You Don’t Need to Freeze to Offset Energy Costs
    Are you lowering your thermostat to save on energy costs? We’re all seeing higher oil, gas and/or electric heat...
    Read More
  • Commercial Building Owners: Get a 50-80% Rebate on Insulation
    January 15, 2025
    Commercial Building Owners: Get a 50-80% Rebate on Insulation
    MassSave, in partnership with Eversource and National Grid, is rebating businesses up to 80% of the cost of insulating...
    Read More
  • Do you know how old your insulation is?
    November 15, 2024
    Do you know how old your insulation is?
    If your insulation is at least 15 years old, and especially if you’ve had it for 20 years or...
    Read More

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PO Box 3
Littleton MA, 01460

978-266-1122
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