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Charitable Events

Great Northern Insulation is proud to participate in charitable events whenever possible. Below are some of our highlights of the last few years!

The Great Holiday Food Drive 2022

For the Holiday 2022 season, all companies under GNI Management Group Inc. are aiming to raise over 1,500 items of non-perishable food and toiletry items to donate to local food banks across Ontario and Montreal.

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Women Build November 2019

In November 2019, Great Northern Insulation partnered with BASF to participate in a Habitat Women Build day supporting Habitat for Humanity Heartland Ontario.

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Truck Convoy for Special Olympics 2019

GNI participates in the 15th Annual Paris Truck Convoy for the Special Olympics, an event that has raised over $1 million for Special Olympics Ontario in its 15 years of operation.

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Heart & Stroke Big Bike 2019

Great Northern Insulation's Woodstock branch participated in the 2019 Big Bike Event in support of research; a push to create a better future for women's heart and brain health.

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Habitat for Humanity Women Build

Great Northern Women is a team comprised of ten women from the Great Northern Insulation Woodstock branch. In January 2019 they helped build Brianne and Brayden their new home!

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Heart & Stroke Big Bike 2018

In May 2018, GNI employees from the Woodstock branch raised $3,705 in support of the Heart & Stroke Foundation, shattering their team goal of $1,500.

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Woodstock Hike For Hospice 2017

In September 2017, employees of the Great Northern Insulation Woodstock branch participated in the 2017 Hike For Hospice at Roth Park in Woostock. The event raised over $76,000 for the VON Sakura House.

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United Way Day of Caring 2017

In June 2017, ladies from the Great Northern Insulation Woodstock branch - and Tom - participated in the Oxford United Way Day of Caring by helping to complete projects with local non-profit organizations.

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2017 Udodge Tournament for United Way Oxford

In April 2017, employees from the Great Northern Insulation Woodstock branch participated in the 2017 Udodge Tournament for United Way Oxford. The GNI Ballers dodged, ducked, dipped, dodged, and dove their way to helping United Way Oxford raise over $17,000 for the community and local programs.

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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

Muskoka, Haliburton, Northern Ontario

1027 Elwell Park 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

Greater Toronto Area

2 Guided Court
Etobicoke, ON
M9V 4K6

TOLL FREE: 1-800-265-1914

GTA East

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

TOLL FREE: 1-800-265-1914

South Central Ontario

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

TOLL FREE: 1-800-265-1914

Eastern Ontario

1035 Moodie Dr #1,
Nepean, ON
K2R 1H4

TOLL FREE: 1-800-265-1914

Niagara Region

25 Lincoln Ave
St. Catharines, ON
L2P 2C7

TOLL FREE: 1-800-265-1914


Great Northern Insulation - Better Business Bureau Profile.

Homestars Best of 2021 Award

Best of 2021

HomeStars has ranked Great Northern Insulation as a company that goes above and beyond in every aspect of business for the year of 2021.

Homestars Best of 2022 Award

Best of 2022

HomeStars has ranked Great Northern Insulation as a company that goes above and beyond in every aspect of business for the year of 2022.


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

Trusted for Over 40 Years

Over 40 Years in Business

At GNI, we service your project with the most experienced staff in the industry. Ongoing professional development is an obsession at GNI and we will not compromise at any level to bring to our customers the very best Installers, Sales Representatives, Customer Care Personnel, Field Superintendents, Estimating and Technical Support to your project.

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

January, 2021 regulatory phaseout of hydrofluorocarbons (HFCs) with the introduction of WALLTITE CM01. Using hydrofluorolefins (HFOs) with lower global warming potential (GWP) compared to HFCs, WALLTITE CM01 is the next generation of spray foam insulation.



Heatlok® Soya HFOTM leverages Honeywell’s latest Solstice® Liquid Blowing Agent technology. This new hydrofluoroolefin (HFO) blowing agent is the most environmentally conscious blowing agent produced to date, with a zero ozone depletion potential (ODP) and a global warming potential (GWP) of 1, which is more than two orders of magnitude (99.9%) lower than HFCs used in this industry.


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).

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 Home Efficiency Rebate Plus program offers up to $10,000 in home reno rebates – and Great Northern Insulation can pave the way.


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


We are Verified & Bonded by eRenovate. When you choose to proceed with our services through their platform, you receive the gaurantees set forth through their program.

As Seen on Love It or List It

The GNI crew have been featured installing insulation on Love It or List It - have you seen our logo in an episode?

Climatizer Cellulose


CLIMATIZER PLUS cellulose insulation is manufactured from a minimum of 85% locally-sourced post-consumer recycled newsprint. Non-toxic additives are applied to the uniquely fiberized paper generating a building material with superior thermal and acoustic properties, as well as exceptional resistance to fire, moisture, mould and pests.

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