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Ontario Home Insulation With Great Northern Insulation

August 15, 2019

Ontario Home Insulation with GNI

From Ottawa insulation installs to Windsor insulation retrofits - GNI has you covered. With 7 locations across Ontario, GNI is committed to providing quality service that comes packaged with a satisfaction guarantee. This means that no matter which one of our Ontario branches helps you with your home renovations, you will be in the well-trained hands of our Customer Experience Team and our experienced crew of installers.

GNI Is Proud to Serve all of Southern Ontario

The main offices for GNI are all over southern Ontario, ensuring that every Ontarian has access to an affordable and effective way of improving their home. The main GNI locations for Southwestern Ontario are: Sarnia and Comber. For South-Central Ontario: Woodstock. For the GTA: Milton and Port Perry. For Muskoka and Northern Ontario: Barrie and Gravenhurst. And for Eastern Ontario: Nepean (Ottawa).

To find your nearest GNI provider, please enter your postal code near the bottom of the GNI webpage. If you would like to speak with our Customer Experience Team and take the first steps towards a more comfortable, affordable, and environmentally friendly home, call us toll free at  1.800.265.1914 or leave us a message on the GNI website.

Toronto Insulation Installs are Affordable and Effective

Making home renovations in the GTA can seem intimidating due to unexpected costs and the need to set aside enough time for the renovations to be completed. However, GNI helps you plan your home improvements according to your budget and your schedule. This means that you can rest easy knowing that your renovations are in experienced and efficient hands. Also, with the current rebates available, it has never been more affordable for homeowners to make home improvements within the GTA.

Toronto residents are able to apply for the Home Energy Loan Program (HELP), which offers a low interest loan for homeowners to improve their home’s energy efficiency. The loan is also unique as it is attached to the home and not the individual. This means that when it comes time to sell and the loan has not been fully paid off, the new owners will take on the remainder of the loan along with the improvements that you have already made thus far. With the help of HELP, Toronto insulation upgrades, improvements, and retrofits can be made to fit into even the tightest of budgets.

The Home Efficiency Rebate Program for Ontario Insulation

Recently, a new rebate program has emerged to help make it more affordable for Ontarians to improve their home’s energy efficiency. With up to $5,000 of rebates available, the Home Efficiency Rebate program has made it easier for homeowners to see a return on their investments through utility bill savings. Additionally, the Home Efficiency Rebate Program (HER) is offered to all Ontario homeowners who are Enbridge Gas/Union Gas customers, meaning that even homeowners who live in smaller cities/towns are eligible to apply. For example, the HER program can help with Collingwood insulation installs, Hanover insulation upgrades, Brighton insulation retrofits, and Goderich insulation renovations.

The first step to receiving a rebate through the HER program is to have a certified service organization conduct an energy audit of your home. A home energy audit provides you with a comprehensive look at your home’s current energy performance, along with a list of suggestions for how it could be most cost-effectively improved.  

A Home Energy Audit is the Key to Cost-Effectiveness

With a home energy audit from a certified service organization - such as our friends at Barrier Sciences Group - the most cost-effective home improvements can be targeted for things such as: Toronto insulation installs or Woodstock insulation retrofits. This is possible due to the extensive testing and computer modelling that occurs during an energy audit, and the knowledge and experience of the registered energy advisor who conducts it.

With the information the audit provides, you can also see the expected energy savings and financial savings for each suggested home improvement. This makes it easier and more affordable for Ontario homeowners to improve their home, as they are able to target the most cost-effective upgrades only. As a result, it is easier for homeowners all across Ontario to improve their home and start reaping the benefits of a more energy efficient home.

You Can Count on GNI - Even in Smaller Towns

With 7 GNI locations scattered across Ontario, and GNI’s ability to improve any type of home or building, homeowners of every different building type are all starting to take their first steps towards a more energy efficient and affordable living space.

This means that for homeowners with a heritage home in Windsor, insulation improvements are viable and effective. The same applies for homeowners in a newly built home in Ottawa, as insulation levels can still be substantially improved over the requirements of the current building code. For homeowners in Toronto, insulation costs can be effectively managed with the Home Energy Loan Program. And for all homeowners in Ontario, insulation can be affordably improved with the help of the Home Efficiency Rebate program.

Contact Us

If you would like to get started with your home improvements, or if you have any questions about our services or our service area, call us toll free at 1.800.265.1914.  Alternatively, you can leave us a message on the GNI website that includes your contact details, and our Customer Experience Team will be in touch with you shortly. Also, as your rebate experts, GNI is able to answer any questions you may have regarding the Home Energy Loan Program in Toronto, the Home Efficiency Rebate program in Ontario, or any of the other rebate programs that are currently available to Ontario homeowners. Don’t wait to make your home improvements -  contact us now and feel the difference of living in an energy efficient home.

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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