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When It Comes To Home Insulation In Toronto, It's Important To Effectively Seal Air Leaks

June 09, 2017

To ensure the optimum in home energy efficiency, industry experts agree that insulation and air sealing are both key components. Hard to believe, but in most homes, some 30% of heating and air conditioning is wasted because of air leakage in the "building envelope". For homeowners interested in improving home insulation in Toronto, it's also important to seal air leaks at the same time. This would include addressing air leakage in the roof, the attic, and the basement - all areas that contribute to significant air leakage. Even in a newly built home, there are zones of air leakage that can be problematic. Contractors who provide home insulation in Toronto will also want to seal air leaks in order to ensure the least amount of air leakage. Home energy professionals agree that proper air sealing provides much added value to an insulation project - it's the best return-on-investment when working to improve home energy efficiency. The fact is, a home that is well sealed and well insulated can save hundreds of dollars a year in utility costs. After a few years, an energy-efficient home can save enough on heating and air conditioning to offset the cost of the original project work. When it comes to home insulation in Toronto, the added effort to seal air leaks will make a big difference in any retrofit. A properly sealed space has measurable benefits: overall insulation performance is improved; energy efficiency is enhanced throughout the home; and the HVAC system performs better. The important thing is to have all of the work expedited professionally. Beyond installing (or re-installing) home insulation in Toronto, the added work to seal air leaks shouldn't be underestimated. The thing is, when the "building envelope" is effectively sealed, the entire indoor environment is improved. Indoor comfort is enhanced. Air circulation is better balanced. And indoor air quality is healthier. As well, an effectively sealed home will ensure that circulating air moisture is better controlled. And along with proper indoor ventilation, the entire living environment is much more comfortable.

The most effective home insulation and air seal combination

When recommending home insulation in Toronto, many industry professionals are suggesting spray foam insulation to insulate and seal air leaks at one time. This application creates a more effective airtight space than any other product combination. It's particularly effective in the attic and basement, where there are many hard-to-reach spaces. The spray foam application also eliminates the need for a separate freestanding vapour barrier because the foam envelope actually restricts the circulation of air moisture. At Great Northern Insulation, installers are highly experienced with spray foam. Homeowners can rely on top quality products and superior installations. Every project, regardless of size, is installed to code, and customer satisfaction is guaranteed on every job. To arrange for a FREE home energy assessment in Toronto, contact the professionals at Great Northern Insulation by calling toll free at 1-888-778-9591, or visiting the company website at www.gni.ca.

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

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Muskoka, Haliburton, Northern Ontario

1027 Elwell Park Road
Gravenhurst, Ontario
Canada P1P 1R1

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Central Ontario

29 Ferndale Industrial Drive
Barrie, Ontario
Canada L4N 9V5

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GTA East

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

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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


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


Great Northern Insulation - Better Business Bureau Profile.


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.


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.


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.


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


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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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