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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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    Great service from the start with our quote to the end with the insulation. They were ready to go within days of our quote and were on time when scheduled. They used various tools to keep our house clean and cleaned up well after themselves. I would definitely use them again and recommend them to anyone who asks.

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    Sally K

    Very professional and thorough work

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    Ellyse H

    We had our entire house insulated by Great Northern (attic to basement) this past week and the experience was great. Very professional, cleaned up after themselves. Would definitely recommend to a friend.

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    We've used Great Northern Insulation several times over the years. We've only ever had excellent service from the Sales Rep, Installers and Office Personal. All work was done on time. The guys are very professional and clean up after themselves. We have no complaints and would highly recommend this company to anyone looking to get Insulation done. Keep up the good work!

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    I have worked with Great Northern for a number of years and always found Kevin and the installation crew to be very knowledgeable and helpful. The sites are always left clean. Thanks Ian

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    Alex B.& Orvil B showed up, right on time and immediately got to work. They were very professional and completed the job in a timely fashion. I was asked if I would like to inspect their work, but declined as I felt that they had done the job correctly....Thanks GNI

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    Lene D

    They came right on time. They were very pleasant and went straight to work. They did a wonderful job! I would highly recommend them!

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    The guys arrived on time. Very pleasant. Did a great job and cleaned up as well.Would recommend them highly.

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    Penny M

    They did a very good job, we are very happy of the good job they did. It will be a big difference on our heating bill. Thanks so much.

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    James V

    Did a good Job. Good experience.

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    Donna J

    We are very pleased. They arrived on time, but had trouble with the machine on the truck. They had to go back and forth to their office three times before they could get it working, but they persevered and got the job done. They were courteous and cleaned up after. They handled the difficulty very well, it took longer than expected but these things happen.

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    Len C

    Excellent service and quality installation

    I tendered a few quotes to spray foam our large attic in our older Victorian home. I was impressed by the knowledge of the salesperson, John, and his quote was the best one we received. The installers, Dave and Colin, were excellent and clearly knew their stuff. In speaking with one of them I learned that he had been with Great Northern for 7 years as an installer. This was good to hear since there is no substitute for experience when it comes to installing spray foam.

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    Good service, great people, I recommand

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    Lisa K

    Need insulation in your house this is the place to call. Jeff and Brendan are awesome. They insulated my old home quickly and Jeff always kept me posted on what was being done and when it was being done. Noticed a change in the warmth of my home the first day after they insulated the exterior walls. The basement was done also and a huge change is being noticed in that area too. Thank you Great Northern Insulations my family will be nice and warm this winter and cool next summer.

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    From the Estimate to the information from the office staff to the work, it was all done very professionally. Overall a good experience

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    Great work!

    Very impressed with the overall experience with Great Northern Insulation. From the original contact for the quote, to the ladies working in the office, to the installers that were here today everyone was courteous, professional, and helpful. My only complaint would be that the spray foam team left all the protective plastic sheeting staples in my drywall so I will have to remove all of those for the drywaller to do her job. I would still recommend them and use them again.

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    Riess E

    Good job!

    Guys were nice, quick and professional. There was a tiny bit of miscommunication via email but no worries.

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    Ryan S

    Jeff and Brendan were awesome to work with. Made sure everything was plastic wrapped properly and got the job done fast and clean.

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    Kayla B

    Great Northern was able to insulate our basement as well as almost all of the walls in our century home. They were quick to communicate in the early process and the employees, Jeff and Brendan, were polite, kind, and very efficient. The process was also fairly quick and painless, other than a bit of noise. Overall a great experience!

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    I was notified as to when the work was going to be done and they were on schedule. Nick, Aaron and Shawn were very polite and professional. They would always knock or ring the doorbell before they entered. They wore covers over their shoes and did a very good job of cleaning after the job was done. When insulation came through a washroom vent, they were very quick to take care of that and cleaned up the area very well.

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