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How Does Heat Insulation Trap Heat?

November 24, 2015

For many homeowners, the scenario is familiar - sitting in the living room in winter, feeling chilly, and bumping up the heat. It does the job in the short term, but it's not productive and it's far from efficient. The better scenario is to provide the home with proper heat insulation, and in fact, the more heat insulation, the better. There is far less energy loss, there is more comfort, and fuel bills are reduced. The good news is that heat insulation can do it all "under one roof". Without getting overly technical, heat can travel, and it can escape from the home in a variety of ways. The professionals refer to this as "heat flow", and for the majority of homeowners it's not desirable. A typical home experiences heat loss from the doors and windows; the roof and attic; even the walls and floors. And heat insulation is designed to trap heat, prevent it from escaping, and thus keep the indoor environment warm and cozy throughout the winter. The scenario for the "chilly" homeowner is simple: indoor heat escapes; it gets cold inside; the heat gets bumped up; and the utility bills rise. It's totally counterproductive, and it's clearly more preferable to provide appropriate heat insulation. One of the best things about home insulation is that it pays for itself. Even with a hefty, upfront project cost, the utility savings (during the winter months and summer months) will easily pay down the original investment. Heat insulation is designed specifically to stop heat from escaping. And with so many options for heat to escape, homeowners must prioritize where heat insulation will best serve the home.

  • The attic is known to be a primary source for heat loss. Heat insulation will ensure that the space is sealed and airtight. And along with the appropriate ventilation, the home will benefit from both energy efficiency and comfort.
  • For interior and exterior walls, a custom "drill and fill" technique provides heat insulation to insulate the wall cavities. This technique (installed from inside or outside the home) provides much enhanced levels of insulation.
  • Heat insulation in the basement is one of the most effective. A product like spray foam serves as an insulating envelope, air barrier, and vapour barrier all at once. It's a "system" that ensures both comfort and utility savings.
  • For attached garages, heat insulation will prevent heat loss from the house itself, as well as a "bonus room" located above the garage. Here again, spray foam insulation can provide seasonal comfort and annual savings.
  • Beyond the more conventional applications, heat insulation also includes draft proofing. With the right products and installations, draft proofing provides worthwhile benefits throughout the home, and noticeable savings.

Whatever the insulation product or the installation technique, a heat insulation project should be done right the first time. It's a home improvement project that will deliver more benefits than other, more cosmetic, home projects. Best of all, the annual savings on heating and cooling costs will quickly "pay down" the initial project investment.

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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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

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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!

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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.

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HomeStars has ranked Great Northern Insulation as a company that goes above and beyond in every aspect of business for the year of 2021.

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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

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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.

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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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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