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GNI Introduces Sloan Insulations as Newest Member of the Family & Increases Presence in Sarnia-Lambton

December 21, 2018

SARNIA, ON, December 21, 2018 – Great Northern Insulation (“GNI”) today announced that the company will be expanding its presence in Sarnia-Lambton with the addition of Sloan Insulations. This announcement follows GNI’s recent Ottawa expansion in October through the company’s amalgamation with Insultech Insulation Specialists.

Sloan Insulations and GNI have had a long-standing relationship in the marketplace for more than 15 years. Current employees of Sloan Insulations will join the ranks of GNI, with more jobs expected to be created.

“We are already amazed with the dedication to detail and customer experience that the employees of Sloan Insulations provide,” said Matthew Mulligan, VP of GNI. “That is why we are absolutely thrilled to welcome all of them into our growing family of skilled building envelope professionals.”

“We have been operating in tandem with Great Northern Insulation in the Sarnia area for more than 15 years now,” said Kelly Sloan, President of Sloan Insulations. “I know that our insulation professionals will continue to put the same, or higher, level of skill and pride in their work as they have since 1978.”

As part of the company’s continued expansion, GNI is looking to fill roles for insulation installers, sales consultants, and administration staff across all of its branches in Ontario. These locations include: Ottawa, Sarnia, Comber, Barrie, Milton, Port Perry, Gravenhurst and Woodstock.

About Great Northern Insulation

Great Northern Insulation is a leading construction company in Canada that services residential, commercial and agricultural buildings. Starting with insulation in 1980, GNI now offers complete building envelope solutions, including firestopping, fireproofing, paneling and cladding, RETscreen and energy reports, and Magnetite window systems. GNI employs more than 345 people across eight branches in Ontario. In 2016, GNI became a part of the Mill Street & Co. group of companies.

For more information, please visit www.gni.ca, www.linkedin.com/company/great-northern-insulation-inc.www.facebook.com/GreatNorthernInsulation, www.twitter.com/gninsulation, www.instagram.com/gninsulation, or call 1-800-265-1914.

Contact Information:
Robert De Medeiros, Marketing Coordinator

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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