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5 Cost-Effective Retrofits that Will Enhance Existing Home Insulation

July 14, 2017

Across Canada, more and more homeowners are interested in improving the energy efficiency of their homes. It’s a matter of reducing utility costs, improving indoor comfort, and protecting the environment. The bigger question is how to get it all done – and here, it’s matter of priority. For many professionals, the best approach is to make retrofits that will enhance the existing home insulation. In this way, issues like air leakage and air sealing can be addressed effectively.

Older homes are typically drafty and poorly insulated. This directly contributes to high levels of air leakage and higher energy bills in winter and summer. And while newer homes have better insulation and better airtightness, there are still a good number of retrofits that can be initiated to enhance existing home insulation. What’s most important is to hire qualified home energy specialists to do the work (recommended by Canada Mortgage and Housing Corporation).

Attic Insulation Retrofit

In the attic, one of the most cost effective retrofits is to top up existing insulation. However, even newly installed home insulation will not perform optimally unless the attic is properly air sealed and ventilated. This is where an air barrier/moisture barrier is essential to energy efficiency.

Windows/Doors Retrofit

Ideally, replacing existing windows and doors will make a big difference in energy efficiency. For most homeowners this would entail double or triple-glazed units, argon-filled, and with low-conductivity frames. Here again, wall-window air sealing is key to stopping air leakage.

 Wall Insulation Retrofit

Because every home is built differently, insulation retrofits to “above-grade” walls will differ. Beyond the specific home insulation product that will be installed, it’s absolutely critical to install an effective air barrier/moisture barrier to stop air leaks and prevent moisture buildup.

Foundation Wall Retrofit

Where possible, and where the budget permits, re-insulating foundation walls (“below-grade”) can dramatically improve energy efficiency. In a basement, for example, high performance home insulation and appropriate air sealing can make the entire home far more energy efficient.

Basement Floor Retrofit

Clearly, this is one of the major retrofits. Insulating the basement floor will substantially enhance indoor comfort, while reducing both winter and summer utility costs. Done professionally, this type of insulation retrofit may be the ideal opportunity when doing significant home renovations.

Home insulation experts will generally encourage homeowners to upgrade their insulation and air sealing while doing other home renovations. It’s an ideal opportunity to combine the work and enjoy a more cost-effective experience. When walls are down or exposed, for instance, this is an ideal time to add insulation and install an air barrier – both of which will enhance the overall energy efficiency in the home. Needless to say, going with a professional approach is preferable.

For homeowners focused on improving home energy efficiency, the insulation experts at Great Northern Insulation offer an easy online tool to move things forward. By using “My EnergyXpert”, homeowners can assess their home’s performance and identify areas of improvement. With GNI, cost effective retrofits can be implemented to enhance a home’s energy efficiency. For more details visit www.gni.ca or contact Great Northern Insulation directly at 1-800-265-1914.

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


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).


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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.


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