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935 Keyes Dr, Beachville, ON N0J 1A0
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Methods of Payment:

  • Visa
  • Mastercard
  • Cash
  • Cheque
  • 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


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,


Ratings & Reviews - Great Northern Insulation Ltd

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    I highly recommend Great Northern Insulation. They did a great job installing foam insulation at a reasonable price. We received a quote from another contractor that was much higher. The salesman/estimator (Eric) was very knowledgeable and helpful in ensuring that we understood the process and selected the right product. I would hire them again.

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    Jim M

    had your company come in to spray foam and blow in attic insulation to a new garage which we just build. Your staff were there on time, pleasant, courteous and new what they were doing. Asked me to look over everything before they left, both levels were cleaned up and all garbage was removed. Would definitely recommend Great job

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    They showed up on time. Work was completed as quoted. They gave us a full written description of the job. Left everything clean. Very professional. I would highly recommend them.

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    Total satisfaction with service

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    I am very pleased with your staff, they all seemed trustworthy, know what they are doing, friendly, and above all, your price is reasonable. I have already recommend a few pals to your Company.

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    Had a wonderful experience with this company. Excellent communication. Staff was great to work with. Special thanks to Dan and his crew who stayed late into the evening to finish the job. Would definitely recommend these guys!

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    The installation team was fast clean and efficient. I would recommend Great Northern Insulation to anyone wishing to upograde their attic.

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    From quote to completion of the job, very professional. Brendan and Keegan were polite and friendly. Explained exactly what they were going to do (which was as per the quote I had received from Mike the Sales Manager). Excellent work; I would recommend GNI to anyone who wants a worry-free job to be done in their home.

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    GNI responded quickly with an estimate and an appointment to do the work. Team were prompt, cheerful an courteous. Very pleased with the work.

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    I would like to leave a great review for your company. From Mike who did our quote to Jason who followed up and the two great installers ( I feel terrible I don't know their names). Everything about this purchase was positive. I cannot recommend Great Northern Insulation enough, particularly the Port Perry location. Quality of workmanship and product is A+! " Highly recommend! already have spread the word how amazing the experience was from start to finish

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    We recently had our attic insulation removed and new insulation blown in by GNI. The entire process from initial quote to job completion was handled in a very professional manner. I would definitely recommend GNi.

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    I got several quotes to increase the insulation level in my attic. Each quote was comparable; however I went with GNI because they had the best customer service. Once I submitted a request for a quote, I was contacted shortly after, a representative came to our home, and I received the quote in a very timely manner. Once the crew came to complete the work, they covered the floors, did the job very efficiently, and cleaned up at the end. Overall, an excellent job and great customer experience usi

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    Great job right from the quoting process all the way to installation. Showed up on time and went straight to work. We have been going through a renovation and this company was one of the best. I would highly recommend this company to anyone.

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    Great work. Explained everything in detail. Accommodated a last minute request to spray another room.

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    Very accomodating from getting a quote to completion.

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    Top-notch customer service

    Excellent service and on a timely fashion really went over all the options with me and my family and explained everything in great detail really see the cost-benefit and savings thank you!

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    Very easy to work with. Promptly returned messages, showed up on time, cleaned up after themselves and did a great job. Looking forward to enjoying a warm and dry basement this winter. Would definitely recommend this company!

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    Excellent service from start to finish. Mike came in a did a quote and explained the process to us. Nick followed up with the scheduling and even got us moved to an earlier time then expected. Scott and Brady came in and did the insulation and did an excellent job! They answered all my questions and explained how things were done once again so we were all on the same page. Everyone we dealt with was courteous, professional and extremely efficient. Best price hands down!!

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    Excellent customer service right from the telephone call to the work done at my home. I highly recommend Great Northern Insulation.

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    Great service. Very professional. Happy with the work.

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