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5 Ways to Reduce Heat Loss & Optimize Energy Efficiency in Your Home

January 17, 2018

Properly insulating a home goes beyond just installing insulation. The idea throughout the home is to reduce heat loss – and that’s what leads to better energy efficiency. Every effort to reduce heat loss makes a difference. That includes blocking air leakage and providing high performance insulation. The result: a noticeable reduction in energy consumption and lower energy bills.

Attic insulation

In the average home, probably the most important place to reduce heat loss is the attic and roof. Here, proper air sealing and quality insulation will prevent air movement, block heat loss, and stop moisture from collecting. This will ensure energy efficiency in both summer and winter. A well-sealed attic will not allow heat to escape in the winter and will not allow warm outdoor air to intrude during the summer. Best of all, seasonal comfort is ensured throughout the year.

Basement insulation

Another part of the home where it’s important to reduce heat loss is the basement. When the basement is well insulated, the HVAC system (winter heating and summer cooling) will operate in better balance and with greater efficiency. This makes for lower utility bills. A well-insulated basement has better R-Values, reduced air leakage, and controlled air moisture. Beyond the improved energy efficiency, the basement becomes a more comfortable space season to season.

Air ventilation

Proper ventilation is essential to the performance of the attic space. In situations where air leakage is present (and moist/humid air is allowed to leak into the attic space), air circulation and ventilation prevents moisture from accumulating – it therefore prevents condensation buildup in the winter months and reduces heat transfer during the summer months. For proper performance, insulation and ventilation must work together. For optimal performance, don’t forget to address air sealing! 

Draft Proofing

Windows and doors that are not properly sealed contribute to heat loss. Consequently, complete weatherization of the “building envelope” will effectively reduce heat loss. This is accomplished by sealing window-frames, doorframes, and even recessed ceiling lighting fixtures. In short, sealing a home tightly is the key to preventing air leakage. This in turn will reduce heating needs in winter and cooling needs in summer. The result:  improved home comfort and utility savings.

Air leakage

In every home, regardless of size, air leakage is very impactful on energy efficiency. In fact, most professionals insist on addressing air leakage at the same time as considering upgrades to home insulation. Air leakage is simply a recipe for wasting heating and air conditioning. While many homeowners focus on insulation as a remedy, resolving air leakage issues has proven to be critical in improving energy efficiency. Every effort to reduce heat loss must include air sealing. Ask GNI how you can measure your home’s air leakage through a Blower Door test.

Upgrades & Retrofits

At Great Northern Insulation, residential homeowners are assured of a professional approach to insulation upgrades and retrofits. From weatherization, to air sealing, to insulation retrofitting, the team at GNI will ensure measurable improvement to overall energy efficiency. And that, of course, means lower utility bills both summer and winter. Find out more by visiting the company website at www.gni.ca or call 1-800-265-1914 to arrange for an in-depth home inspection.

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


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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.

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


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

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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.


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GREENGUARD® Gold Certification ensures the strictest criteria for low-level chemical emissions. Certified products are safe for individuals with sensitivities (children/elderly) and safe for use in school environments and health-care facilities. The product certification is widely recognized by the LEED Rating System (Leadership in Energy/Environmental Design).

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.


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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.


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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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