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Commercial Retrofit

Metal Roof Retrofits

Metal Roof Retrofits

Great Northern offers a 3-step metal roof retrofit solution that does not require you to replace your metal roofing and adds multiple benefits on top of a traditional roofing system that will look just as nice, if not better.

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Spray Foam Insulation

Spray Foam Insulation

Spray foam insulation is widely recognized as the most versatile insulating product on the market today. 

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Condominium Weatherization & Window Film

Condominium Weatherization & Window Film

Weatherize your condominium to improve occupant comfort, health and safety, as well as building durability and energy efficiency.

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The Stack Effect

The Stack Effect

The Stack Effect is a phenomenon that occurs in all types of buildings, but particularly in tall buildings.

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Firestopping

Firestopping

Firestopping is the practice of utilizing a system of joint and penetration sealants on a fire-rated wall, ceiling, or floor assembly within a building. 

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Rooftop Ductwork Insulation & Air Sealing

Rooftop Ductwork Insulation & Air Sealing

Proper insulation of exposed rooftop ductwork increases mechanical efficiency and unit lifespan.

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Tank Insulation

Tank Insulation

Spray foam insulation provides an excellent thermal barrier and is an extremely efficient insulator.

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Roof-Wall Junction Air Sealing

Roof-Wall Junction Air Sealing

Air sealing the entire building is important to improving its overall air quality and energy efficiency.

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In-Plant Painting & Coating

In-Plant Painting & Coating

Epoxy-based floor coatings are tough, resistant, and easy to keep clean.

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Window Films

Window Films

With GNI applied 3M Window Film the results are so immediate and so significant that you can expect that the amount of money you save on energy costs could pay for our film and installation in less than five years.

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Building Diagnostics

Building Diagnostics

GNI professionals are trained and educated with the tools necessary to fully assess a building's energy usage and efficiency.

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 Old Insulation Removal

Old Insulation Removal

As a professional contractor, new homebuilder, or renovation expert, you may be positioned to offer your customers insulation removal, as part of your service package - or you may not.

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Air Leakage Solution

Air Leakage Solution

Our goal is to ensure that your building envelope is properly weatherized and performing at the highest level. 

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Insulated Panelling & Cladding

Insulated Panelling & Cladding

Insulated panelling and cladding can restore your building’s look and useful life.

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ICI Retrofit

ICI Retrofit

As building science specialists, we effectively air seal buildings, so that air and moisture issues are remedied at source. 

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Client Feedback

GNI took care of everything I needed to have a more comfortable, energy-efficient home

Rating:

star star star star star

Reviewed by:

  Clare

Very professional and courteous. Greeted with a hand shake which is something that doesn’t happen all too often.

Rating:

star star star star star

Reviewed by:

  Aidan

Wow, just wow. First experience with Great Northern and I was and remain impressed with the experience

Rating:

star star star star star

Reviewed by:

  Patricia

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!

Rating:

star star star star star

Reviewed by:

  Art
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 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

GTA East

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

Eastern Ontario

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

TOLL FREE: 1-800-265-1914

Sarnia/Lambton

259 Campbell Street
Sarnia Ontario
Canada, N7T 2H3

TOLL FREE: 1-800-265-1914

Niagara Region

6260 Don Murie St
Niagara Falls, ON
L2G 0B4

TOLL FREE: 1-800-265-1914

BBB

Great Northern Insulation - Better Business Bureau Profile.

Homestars

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! 

HomeStars 2018

Best of 2018

For the second year in a row, HomeStars consistently ranks Great Northern Insulation at better than 95% for customer satisfaction. Thank you again to everyone!

Homestars Best of 2019 Award

Best of 2019

For the third year in a row, HomeStars ranked Great Northern Insulation at better than 95% for customer satisfaction.

Homestars Best of 2020 Award

Best of 2020

For four years now, HomeStars has ranked Great Northern Insulation at better than 95% for customer satisfaction.

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.

Lowes

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.

Insulthane Extreme

Insulthane® Extreme

For the ultimate in high performance spray foam insulation, Insulthane® Extreme is the professional choice for residential, commercial, and industrial application. With improved thermal performance over other products, Insulthane® Extreme has an exceptionally low Global Warming Potential (GWP). Considered environmentally friendly, this next generation spray foam insulation is non-ozone depleting, and exceeds specifications of other HFC product alternatives.

3M

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

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

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.

Renomark

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

eRenovate

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?

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