With over 40 years of experience and more than 300 fulltime employees across its eight locations in Ontario, Great Northern Insulation (GNI) services homeowners and industry professionals in the residential, commercial, industrial and agricultural sectors. GNI offers a complete list of building envelope products and services for new and retrofit projects to increase energy efficiency, comfort, and structural durability.
These solutions include insulation, air sealing, fireproofing, panel and cladding, building diagnostics, thermography, and more. GNI's head office is located at 935 Keyes Drive, Woodstock, ON. For over 40 years, Great Northern Insulation has increased the comfort, energy efficiency and durability of buildings and homes throughout Ontario.
These solutions include insulation, air sealing, fireproofing, panel and cladding, building diagnostics, thermography, and more. GNI's head office is located at 935 Keyes Drive, Woodstock, ON. For over 40 years, Great Northern Insulation has increased the comfort, energy efficiency and durability of buildings and homes throughout Ontario.
Services
GNI took care of arranging the energy audit beforehand so we could get a rebate on the work. The installers were quick, polite, and cleaned up after themselves! Professional, friendly, explained things, did a great job, and left my home as clean as it was when they came in! At GNI, we service your project with the most experienced staff in the industry.
Services
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From reputation to responsiveness, HomeStars consistently ranks Great Northern Insulation at better than 95% for customer satisfaction. Thanks to everyone for the great ratings! For the second year in a row, HomeStars consistently ranks Great Northern Insulation at better than 95% for customer satisfaction.
Affiliations
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Great Northern Insulation is a premier sponsor of the 2017 ACMO/CCI-T Condominium Conference in Toronto, Ontario. Great Northern Insulation is a registered member of the National Fireproofing Contractors Association. Great Northern Insulation is a proud member of the Heating, Refrigeration and Air Conditioning Institute of Canada.
Careers
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Build a safer, more sustainable future for our planet as a member of Ontario's largest building envelope provider. Great Northern Insulation offers a challenging and rewarding career in a fast-paced, rapid-growth environment. If you are interested in building a rewarding career within a growing industry, send your resume or questions to careers@gni.ca.
Customer Promise
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Great Northern Insulation is Canada's largest full-service insulation contractor. Over the past 35 years, our 100% Canadian owned and operated company has become the leader in the Home Comfort Industry. We stand firmly behind the workmanship of our crews and we are 100% committed to delivering a reliable, high-quality service to all of our customers.
Reviews
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