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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

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


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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

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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

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™.


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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?

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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