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Great Northern Insulation is Lowe's trusted installer for all things insulation.

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ACMO/CCI-T Condominium Conference

Great Northern Insulation is a premier sponsor of the 2017 ACMO/CCI-T Condominium Conference in Toronto, Ontario.

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Great Northern Insulation is a registered member of the National Fireproofing Contractors Association.

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Great Northern Insulation is a registered member of the Windsor Construction Association.

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Great Northern Insulation is a proud member of the Toronto Construction Association.

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Great Northern Insulation is a proud member of the Heating, Refrigeration and Air Conditioning Institute of Canada.

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Great Northern Insulation is a registered member of the Ontario Home Builders' Association.

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Great Northern Insulation is a registered member of the Canadian Home Builders' Association.

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Great Northern Insulation is a proud member of the Windsor Essex Home Builders' Association.

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Great Northern Insulation is a member of the Haldimand Norfolk Home Builders' Association.

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Great Northern Insulation is a member of the Peterborough & The Kawarthas Home Builders' Association.

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Great Northern Insulation is a pround attendee of the 2017 Partners 4 Employment Career Fair in Waterloo.

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Great Northern Insulation is a yearly exhibitor in the Toronto Fall Home Show.

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Energy X Solutions

Great Northern Insulation partners with Energy X Solutions to provide customers with the most effective home auditing technology available.

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Union Gas

Great Northern Insulation works with licensed service organization Barrier Sciences Group to help customers qualify for home renovation rebate programs through Union Gas.

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London Property Management Association

Great Northern Insulation is a proud member of the London Property Management Association.

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Morrison Hershfield

Great Northern Insulation is proud to be affiliated with Morrison Hershfield.

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Great Northern Insulation partners with FinanceIt to provide easy financing options for our customers.

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Ontario Non-Profit Housing Association

Great Northern Insulation is a proud partner of the Ontario Non-Profit Housing Association.

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Great Northern Insulation is a proud member of The Building Industry and Land Development Association.

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Great Northern Insulation proudly abides by a renovation-specific Code of Conduct set by RenoMark™.

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Western Ontario

935 Keyes Drive
Woodstock, Ontario
Canada N4V 1C3

Phone: 1-800-265-1914

Fax: (519) 539-7946
TOLL FREE: 1-800-265-1914

Southwestern Ontario

7035 Industrial Drive
Comber, Ontario
Canada N0P 1J0

TOLL FREE: 1-800-265-1914

Muskoka, Haliburton, Northern Ontario

1027 Jones Road
Gravenhurst, Ontario
Canada P1P 1R1

TOLL FREE: 1-800-265-1914

Central Ontario

29 Ferndale Industrial Drive
Barrie, Ontario
Canada L4N 9V5

TOLL FREE: 1-800-265-1914

Eastern Ontario

103 North Port Road
Port Perry, Ontario
Canada L9L 1B2

TOLL FREE: 1-800-265-1914

GTA & South Central Ontario

450 Industrial Dr,
Toronto (Milton), Ontario
Canada L9T 5A6

TOLL FREE: 1-800-265-1914


Great Northern Insulation - Better Business Bureau Profile.


GNI is the Authorized & Trusted Insulation and Air Sealing Installer for Lowe’s

Enenrgy Savers

Energy Saving

Energy saving and energy efficiency is easier than one might think. Great Northern Insulation helps to identify performance issues, while taking advantage of improvement opportunities.

100% Canadian

100% Canadian

Great Northern Insulation is recognized as Canada's largest full-service insulation contractor. GNI is 100% Canadian owned, proudly serving Ontario customers since 1980.

Foam Masters

Do it right the first time
- with foam mastersTM

WALLTITE® ECO™ is a high-performance system, professionally installed by certified and approved specialists. Its C.C.M.C. approved (Canadian Construction Materials Centre) - with product quality guaranteed - and with installation by highly trained experts with the technical know-how to do the job right, the first time.


Best of 2017

From reputation to responsiveness, HomeStars consistently ranks Great Northern Insulation at better than 95% for customer satisfaction. Thanks to everyone for the great ratings! 


Gold Certification promise

GREENGUARD® Gold Certification ensures the strictest criteria for low-level chemical emissions. Certified products are safe for individuals with sensitivities (children/elderly) and safe for use in school environments and health-care facilities. The product certification is widely recognized by the LEED Rating System (Leadership in Energy/Environmental Design).


Multi-attribute product certification

ECOLOGOTM is an accredited sign of environmental performance – holistic – green – sustainable - and compliant with strict, third party standards. Life cycle criteria for product certification may include manufacturing and operations; health and environment; product materials and performance; and product innovation, development, and management.


3MTM products.
Quality + Performance = Savings

3MTM energy-saving products are designed to keep warm air in, and cold air out, while keeping energy bills down. Products optimize energy efficiency in buildings and homes; improve indoor environment for occupants; and effect the reduction of seasonal energy costs. 3M products are authorized for LEED credits (Leadership in Energy/Environmental Design).


Baeumler ApprovedTM
Professional, Certified and Insured

Baeumler ApprovedTM gives you peace of mind when connecting with contractors, trades and home service providers. All Baeumler Approved members have demonstrated high quality work for customers and other trade professionals. Members must also have Workers Compensation, liability insurance of at least $1,000,000 and prove professional certification.

Holmes and Holmes

Holmes and Holmes


Mike Holmes and his son Mike Jr. (MJ) convert MJ’s bachelor bungalow into a two-storey home for MJ and his girlfriend Lisa. Choosing the newest materials and build techniques, the father and son team follow Mike’s famous motto – “Make it right.” The show can be watched on HGTV and DIY Network.


Enbridge Incentives

The Energy Conservation Program provides incentives of up to $1,600 to customers who achieve energy efficiency and fuel savings – and Great Northern Insulation can pave the way.

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