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Methods of Payment:

  • Visa
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  • Cash
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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


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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    AlanGerri P

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

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    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.

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    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.

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    Bob M

    GNI provided an outstanding service and have professional and pleasant staff. The salesman was knowledgeable and the crew completed the work on time and did an excellent job. I would definitely use them again.

    Business owner? Respond
    Brad C

    Very professional, on time and clean up after themselves!

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