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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...

Opening Hours

Monday
Tuesday
Wednesday
Thursday
Friday

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,

Specialties

  • 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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    Catherinee
    By

    So impressed with this company and their staff. From the booking process to the implementation, the experience was positive, efficient and extremely professional. I would not hesitate to hire again

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    Merchant Reply February 22, 2017

    Thank you so much for your great review! I am so thrilled to hear that everything had gone smoothly! We really do have the best crew around and I am so happy that you got to see it first hand! Thank you so much for choosing Great Northern Insulation

    mholland
    By

    recently had my garage insulated an d the installers did a great job.

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    Merchant Reply February 22, 2017

    Hi there! Thank you so much for the great review! We are so thrilled to hear that you were happy with the work. Please do not hesitate to give us a call if there is anything else we can do for you! Thank you for choosing Great Northern Insulation!

    SueRatt
    By

    Sue R-The guys did a fantastic job. We had almost everything covered up for them to help. They got our rim joists and all of the basement walls done. Now our basement is warmer then main floor lol. We are doing main floor with roxull then we are doing demo upstairs and having great northern back to sprayfoam everything up there 😃

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    Merchant Reply February 22, 2017

    Thank you so much for the excellent review, Sue! We are so thrilled to hear that we did such a fantastic job on your home. We really do have the best crew around and I am glad to hear that you got to see it first hand. Thank you so much for choosing Great Northern Insulation! Looking forward to working with you again for you upstairs reno.

    Matthew W
    By

    they did a great job spray foaming my basement as well as insulating my attic and where nice and friendly.

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    Merchant Reply February 22, 2017

    Thank you so much for your kind words. We very much appreciate your business and are just as happy to hear how satisfied you were with the work completed at your home. Your compliment will be put into their files and will be beneficial for them come review time.

    Michelle B
    By

    Dave H, Ross and Jonathan came to my home to insulate. They got the job done quickly and did a great job of the walls and floors so far. They've been very flexible about working with us during our home renos, and they will be returning to insulate my attic once we're ready. We had a tiny issue come up and the supervisor Randy went above and beyond to make it right. Very please with the service that I've received so far.

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    Merchant Reply February 22, 2017

    Thank you so much for taking the time to leave a review. We will pass on the good word to the crew members and the GNI Team. We never get tired of hearing from our satisfied clients. Thanks again

    Shakster
    By

    This company is very professional and friendly. Excellent communication. I am very happy with the job they did.

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    Merchant Reply February 22, 2017

    Hi There! Thank you for the review. We are happy to hear that you are very happy with the job.. We never get tired of hearing from our satisfied clients Thank you for choosing Great Northern Insulation

    Justin R
    By

    We had our attic, basement and all our exterior walls insulated by gni. Jeff and Brandon did a terrific job. They were kind and courteous and were very respectable. House feels much warmer now. No complaints.

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    Merchant Reply February 22, 2017

    Thank you so much for leaving a review. I will make sure Jeff and Brandon know how happy you were. We never get tired of hearing from our satisfied clients and hope you will tell your friends and family about your experience

    AlannaG
    By

    Jeff and Brendan came to insulate the main walls of our home and the basement. They were very friendly, helpful, efficient and went out of their way to make it an easy experience for us.

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    Merchant Reply February 22, 2017

    Thank you so much for the great review! I am so thrilled to hear that you were so pleased with the job that we had completed for you. Here at GNI, we want to make sure that every customer is taken care of and that we will suggest what we think would be best for them. Thank you so much for choosing Great Northern Insulation!

    Neven G
    By

    Our basement is a lot warmer now. The gentlemen cleaned up afterwards. They also left a window open for circulation (fumes) before they left. We enjoy using our basement now. I recommend Great Northern for spray foaming basements.

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    Merchant Reply February 22, 2017

    GNI is built upon reputable service and that means going the extra distance required to keep your house in the best shape possible. Thank you so much for your kind words. We will make sure the crew members hear how pleased you are with their services..

    Bonsteel
    By

    Came when they said, cleaned up afterward and were gone in short order. Excellent job.

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    Merchant Reply February 22, 2017

    Hello there! Thank you so much for such a great review! I am so happy to hear that you got to witness first hand how great our team is! Here at GNI, we like to make sure that everything is done to our customers standards. Thank you so much for choosing Great Northern Insulation!

    Wendyloo99
    By

    Great company to deal with. Matt who did the quote was very knowledgable and answered all my questions. The two guys that came to do attic insulation were on time and did a good job. I've called them for another quote for the basement!!!

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    Merchant Reply February 22, 2017

    GNI is built upon reputable service and that means going the extra distance required to keep your house in the best shape possible. Thank you so much for your kind words. We will make sure Matt and the crew members hear how pleased you are with their services..

    TomCat992577
    By

    Another happy customer in London

    The overall experience was very good, the crew was polite & efficient. They cleaned up afterwards and the noise factor during the blown in attic insulation was not too bad at all. I did have to call the office to find out approximately when the crew was to arrive on the prearranged day and no one followed up to see if I was satisfied with the finished project. Two things that would be good additions for even greater customer service. Tom - London

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    Merchant Reply February 22, 2017

    Hi Tom! Thank you for the review and letting us know what areas we could improve on. Our customer feedback is always welcome. Thank you for choosing Great Northern Insulation

    Lucyloo1975
    By

    Very professional and hard working staff. Arrived right on time. All knew their business and were very helpful in answering my questions. Would definitely recommend this company.

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    Merchant Reply February 22, 2017

    hank you so much for the excellent review, Lucyloo! We are so thrilled to hear that we did such a fantastic job on your home. We really do have the best crew around and I am glad to hear that you got to see it first hand. Thank you so much for choosing Great Northern Insulation!

    quip17
    By

    Professional and highly recommended!

    Dave and John arrived on time and gave me a call before they come so I could be ready for them. They were helpful in giving me a hand in moving the last few larger items before they began work. I felt comfortable leaving them to spray my basement walls, and they called me when the job was finished. They cleaned up and even reconnected a shelf that had to be moved! We returned home the next day to a clean, well-aired out space, ready to be set back up. We are very happy with the job!

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    Merchant Reply February 22, 2017

    Hello there! Thank you so much for such a fantastic review! I am so thrilled to see that you got to see our team in motion first hand. We really do have the greatest crew around. Here at GNI, we like to make sure that the process is as smooth as possible - start to finish! Thank you so much for choosing Great Northern Insulation!

    mchester
    By

    I was really impressed with this company. They show up when they say they will. The guy who came to give me the quote and the guys who later came to do the installation were very personable and professional. They were punctual, efficient, neat and cleaned up. I'm very happy with the service.

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    Merchant Reply February 22, 2017

    Thank you so much for your kind words and we will make sure the crew members know how much you appreciated their hard work. We never get tired of hearing from our satisfied clients and hope you will tell your friends and family about your experience

    jonolaynie
    By

    Great work. Done quick and efficiently. Basement spray insulation looks great and seems to be doing it's job.

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    Merchant Reply February 22, 2017

    Hi! Thank you for such a wonderful review and it make us very happy that you can already notice a difference. Thank you for choosing Great Northern Insulation

    cmagowan
    By

    Both Jeff and Ross did an incredible job insulating my basement. They were both very kind and a pleasure to speak with as well as possessed a firm understanding of the trade. Upon completion of the job, had cleaned up very well. The quality of their work was extremely proficient! I would strongly recommend Great Northern to anyone who is looking for insulation work and would definitely be my first call should I require more work completed in the future.

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    Merchant Reply February 22, 2017

    Hello there! Thank you so much for such a great review! I am so happy to hear that you got to witness first hand how great our team is! Here at GNI, we like to make sure that everything is done to our customers standards. Thank you so much for choosing Great Northern Insulation!

    Susan G
    By

    Dave and John were very professional. They were respectful about entering my basement from the backyard which helped keep the tracking to a minimum. They cleaned up after insulating and left my home neat and clean. Great job by these two. They left the window open for me to help get rid of the fumes and also texted me when they were done. Thanks , my home is already warmer!

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    Merchant Reply February 22, 2017

    Thank you so much for such a fantastic review! We are so thrilled to hear that everything went smoothly and up to your standards. Also, that you are already seeing a difference in your cottage! Please do not hesitate to contact us if you have any other projects for us. Thank you so much for choosing Great Northern Insulation!

    VicentiuN
    By

    Jeff and Ross were very polite, arrived on time and did a very good job. They were happy to provide additional information about their company's products and answered all my questions in a professional manner. Thanks a lot!

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    Merchant Reply February 22, 2017

    Thank you so much for your kind words! We are pleased to hear that you had such a great experience with our company. We really do have the best team around! Thank you so much for choosing Great Northern Insulation!

    Lisa D
    By

    Having Great Northern Insulation insulate our basement and attic was a fabulous way to kick off a New Year. We are noticing such a drastic difference in temperature throughout our whole house. Can't wait to see the savings in our utilities. Jeff and Tyler were so professional and used extra care in our home while completing the job you would never have known they were here. Definitely look forward to recommending the Great Northern Insulation to anyone looking for similar services.

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    Merchant Reply February 22, 2017

    Thank you so much for your kind words! We are so thrilled to see that you are so happy with the job that we completed for you. We like to make sure that we put the home back to just the way we found it! Thank you so much for choosing Great Northern Insulation!

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