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  • Financing Available
For over 35 years, Great Northern Insulation has increased the comfort, energy efficiency, and durability of buildings and homes throughout Ontario. Our mission is to provide affordable solutions to each and every customer by reducing their energy costs, improving the acoustics of their living/working environment and addressing their unique fire protection requirements. We deliver these solutions with the most experienced staff in the industry. To achieve our goal of 100% customer satisfaction, we back all of our services with a satisfaction warranty, money back warranty, product warranty, and a sustainability warranty. We firmly stand by the statement that "There is more to insulating than just adding insulation". When selecting an insulation contractor, evaluate your options based on their experience, product expertise, customer service, and workmanship. Contact Great Northern Insulation today and experience what a true professional contractor can do for you! more...

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Products and Services

  • Blown Loose Fill Attic Insulation,
  • Spray Foam Insulation,
  • Cellulose,
  • Batt Insulation,
  • Blown-in Wall Insulation,
  • Crawl Space Insulation,
    • Fireproofing,
    • Thermal Barrier,
    • Insulation Removal,
    • Airsealing,
    • Acoustical System,
    • Cladding,
    • Firestop & Smoke Seal,
    • 3M Window Film,
    • Vapour Barrier,
    • Building Envelope Consultation,
    • Blower Door Testing,
    • Fibreglass,
    • Thermal Imaging,
  • more...
  • less...

Brands Carried

  • BASF Walltite Eco,
  • Honeywell,
  • Owens Corning,
  • Gaco Western,
  • Winroc,
  • 3M,


  • Highest Performing,
  • Environmentally Friendly Products & Services,
  • On Budget,
  • Installed Right,
  • One Source / Full Service,
  • On Time,

Languages Spoken

  • English,

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Ratings & Reviews

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How would you rate this business?
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    Russ B

    Great Northern Insulation used spray foam insulation in our crawl space. We were impressed with the professional manner in which they covered the area before they applied the insulation. Unfortunately a bit of foam insulation over sprayed on venetian blinds. We were compensated for the loss. I would recommend this company. Russ

    Business owner? Respond

    I am submitting this for my aunt who had her basement insulated in Fort Erie. She was impressed by their timeliness (how many times do we wait),and care used in bringing in materials to do the job. They were professional and mindful of the property, cleaning up after themselves when done.When we reviewed, the basement seemed more friendly and warmer. The men were respectful and answered our questions thoughtfully. I would recommend this merchant & their techs Jeff and Brendan anytime. Great job!

    Business owner? Respond
    Laurie C

    Jeff and Brandon, were respectful, courteous, thoro, and friendly. They cleaned up all mess that was made in the process of their work very well. I would recommend these guys anyone. Great job guys, Thank you!

    Business owner? Respond

    I am very pleased with my experience with Great Northern Insulation. Very professional and punctual. I found Jeff and Brendan both very personable and thrilled when I learnt there would be no need to clean up after them. I am impressed with the quality of materials used and would highly recommend this company to my family and friends. Thanks again Jeff and Brendan!

    Business owner? Respond
    Steve V

    I had both attic and spray foam basement insulation installed. The sales rep Bill was great to deal with and answered my many questions in a thorough and timely manner, as did the billing department. The installers showed up on time, went over the job details with me and did a very good job. Overall a great experience. I would recommend them to anyone looking for insulation.

    Business owner? Respond
    Don B

    Very professional work. Workers worked steadily completing the job efficiently and neatly. The lead hand was very accommodating and answered any question asked without a problem.

    Business owner? Respond
    Duane W

    Guys showed up on time (early actually), very professional, cleaned up after..very polite...Did a nice job. Very satisfied

    Business owner? Respond

    We had Great Northern Insulation to our house for adding insulation to our attic and basement. They were excellent! Matt came to give us a quote, and they were able to schedule the insulation so that it was done before we moved, which wasn't a lot of notice! The work was done quickly and efficiently, with minimal mess or clean up required. I would definitely recommend their services.

    Business owner? Respond

    I am very happy for selecting Great Northern Insulation as my attic insulation provider and with the service I have received. My first experience was with estimator Bill, very nice and friendly. The installers, Jeff and Alex, were on time and cleaned up after work was completed. Fair pricing and I would definitely recommend their service to my friends.

    Business owner? Respond

    I hired Great Northern Insulation to insulate my new home construction and was very pleased with the overall service and professionalism. I would highly recommend them.

    Business owner? Respond
    Gary K

    Excellent service, very fast and efficient. I'm very pleased with the result

    Business owner? Respond

    Prompt punctual service. worked fast and left no mess behind. Staff were polite and friendly.

    Business owner? Respond
    Nicole D

    New Build

    Thank you for the great service

    Business owner? Respond
    Amanda S

    We had a great experience with GNI from beginning to end. Bill was very helpful and knowledgable and was always quick to answer any of my emails or phone calls. Jason made scheduling easy, Marilyn in the office was so pleasant to deal with, and the crew was very professional. This was our first BIG renovation on our house, and the staff at GNI, made the whole process smooth. We couldn't be happier and wouldn't hesitate to recommend.

    Business owner? Respond

    it was a good experience they were fast and efficient and i was really happy with the work . i greatly reccomend this company

    Business owner? Respond

    Excellent service, from the salesperson to the installers. Would highly recommend them to anyone needing their attic issues solved.

    Business owner? Respond
    Susie V

    they qere fast efficient and cleaned up after i would defently reccomend this company they did a great job!

    Business owner? Respond
    AlanGerri P

    Excellent service, fair price. The crew cleaned up after themselves. very pleased with quality and service. Thank You

    Business owner? Respond
    Paul D

    From the beginning,GNI was prompt, efficient and professional. Their work was superb and clean-up was flawless. I have already recommended them to a friend.

    Business owner? Respond
    Amanda M

    We have used Great Northern for two of our houses now, and we are very happy with the results. The technicians were friendly and explained what they were doing and were very tidy. Jason in the scheduling department was very accommodating, with all of our requests, as was everyone one else who we dealt with.

    Business owner? Respond
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