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open now 7:00 am - 5:00 pm

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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...

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,

Website

www.gni.ca/yp

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Ratings & Reviews - Great Northern Insulation

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    donnasnewt
    By

    Very professional. Very clean I was impressed with how efficient they were. The only thing they missed was putting the screen back in my window. I would definately recommend Great Northern Insulation.

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    mikeved
    By

    Great job Matt, Dakotq & Jake! Highly recommend. i will be calling GNI within a month to do Garage insulation. Thanks

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    MChapman11
    By

    We worked with Chris, Nick, Mike, Dan, Darren, Matt and Vanessa at the Port Perry Branch. The staff at GNI was informative, friendly and arrived on time. We used this company to complete the spray foam insulation on all exterior walls of our home (upstairs and downstairs) and to poly our attic ceiling. They completed the job in a professional and timely manner. We are very pleased with the work completed and will be sure to pass along the company and use them in future renovation projects.

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    Merchant Reply June 20, 2017

    Thank you for the 5 Star review. We are happy to hear how impressed you are with our Team. Here at GNI, our top priority is customer satisfaction and I am so thrilled to hear that you got to witness it first hand! Thank you for choosing Great Northern Insulation.

    Ryan1233
    By

    Very professional team with reasonable price. Highly recommended.

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    Merchant Reply June 20, 2017

    Hi Ryan Glade to hear everything went well! I will pass your compliment on to everyone involve, we love seeing feedback from our customers. Thanks again for choosing Great Northern Insulation!

    stix93663108
    By

    Garage insulation.

    Great experience. Excellent work. On time delivery and prefessional technicians.

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    Merchant Reply June 20, 2017

    Thank you so much for your review! We are so pleased to hear that you had such an excellent experience with our team! Please think of us if any other projects come up. Thank you for choosing Great Northern Insulation!

    sandieclaude
    By

    Very pleased with the workmanship and we've already referred a friend that had his basement sprayed. Thank you!

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    Merchant Reply June 20, 2017

    Hi Sandie Thank you so much for your review. We are so happy to hear that you had such a fantastic experience with our team. Our top priority is customer service, and we are thrilled to hear that you were able to witness it first hand. Thank you so much for choosing Great Northern Insulation! Keep the referrals coming our way!

    Hector25
    By

    Great Northern Insulation

    GNI did a big attic project that took 3 days and we are very happy with the end results. Ross, Dave H, Aaron, Marv, Shawn and Phil were polite and very informative as I had many questions and they had answers every time. When they finished they made sure I was happy with the work before taking off. I'd would recommend them to friends and family and call them back for future projects. Thank you everyone and a big thank you to Matt in sales for helping us find the solutions to our attic problems.

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    Merchant Reply May 30, 2017

    HI We are glad to hear that your job went smoothly and we were able to exceed your expectation. Thank you for choosing Great Northern Insulation

    Dstnbrgn
    By

    We were approved for the home weatherization program, and it was Great Northern Insulation that came in to insulate our attic and crawl space. Nick & Sean showed up on time, were quick yet efficient, as well as polite and did their best to clean up afterwards with minimal mess left behind. It was a great experience overall, and i'd highly recommend them to friends and family in the future!

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    Merchant Reply May 30, 2017

    HI Thank you so much for the wonderful review. Please don't hesitate to contact us for any of your future projects.

    Feleisha R
    By

    Quick, professional, on time and job well done. Only suggestion would be for better clean up post job.

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    Merchant Reply April 24, 2017

    Thank you Feleisha for your review and for choosing Great Northern Insulation. With your feedback we can address the area's we need to improve on. Feel free to let us know if you have any more questions, or if there is anything further we can do for you

    Peter B
    By

    My installers Alex B & Justin D showed up on time. They were courteous, professional, and efficient. The work was completed quickly and they cleaned up the job site as best as they could prior to leaving. The crew took pride in their work. The GNI price was competitive. I took a look in my attic prior to their leaving and I amazed about how much insulation had been installed. I am looking forward to warm winters and cool summers. I would use GNI again and I recommend their services to others.

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    Merchant Reply March 7, 2017

    Hi Peter Thank you for the wonderful review. We really do have the best team around and we are happy you got to witness this first hand.. Thank you for choosing Great Northern Insulation

    lizzy10
    By

    Excellent service and reasonable prices. We will be using them again for our next insulation project.

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    Merchant Reply March 6, 2017

    HI Lizzy The team here at Great Northern Insulation is thrilled to hear such great feedback. We look forward to working with you again!

    Roy W
    By

    Entirely satisfied with GNI. Jasen and crew were courteous and professional. Also on time and clean. Good job.

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    Merchant Reply March 6, 2017

    HI Roy. I am so glad that everything went smoothly for you. Here at GNI, we like making sure that the process is as easy as possible for our customers, start to finish! Enjoy your newly insulated home!

    Ryan J
    By

    On time and courteous. Left the house in good shape after the job was done. A little bit difficult to get ahold of with questions before the job was started and no follow-up to check how satisfied I was but a good experience.

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    Merchant Reply March 6, 2017

    Hi Ryan We apologize that there were a few hiccups with answering question you had and no follow-up phone call after the work was completed, but super thrilled that you were happy with the crew! We hope that you enjoy your newly insulated home for many winters to come!

    paultm
    By

    Highly recommended

    Our service from Great Northern Insulation was excellent. Bill, Alex B ad Justin D were courteous, professional and friendly. They were extremely concerned with leaving our home as clean (if not cleaner!) than they found it. We have already noticed an improvement with the climate in our home - this was a great investment and we are thoroughly glad we chose Great Northern.

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    Merchant Reply March 6, 2017

    Hi Paul Thank you for the great review and mentioning how professional and friendly our crew members were. We are happy to hear you can already notice a improvement in your home. Thank you for choosing Great Northern Insulation

    bmcfarle
    By

    They did exactly what I expected them to do plus a little more. I paid the same price I was quoted and the job was completed on time as promised even tho I had to change the appointment twice.

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    Merchant Reply February 27, 2017

    Hi There thank you for the great review. We are happy to hear or team went over and above your expectations. We really do have the best crew around and we are happy you got to see that first hand. Thank you for choosing Great Northern Insulation.

    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

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