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Properly Insulating the Basement Has Important Benefits

May 19, 2015

North American basements were originally allocated for additional storage space, the water heater and furnace, and maybe a small workbench area. As it turned out, the basement also became a dumping ground for everything that wouldn't comfortably fit upstairs in the house. We seem to be smarter today, realizing that the basement is actually very valuable space. For many of us, basements are fully finished - adding living space that is roomy and comfortable. Seasonal comfort, especially in the northern climes, is something entirely different. And most of us don't understand how essential it is to properly insulate the basement. It's as important as the rest of the house, and with just as many payoffs. A properly insulated basement space can reduce heating and cooling costs measurably; can better balance the heating and cooling cycles from one season to the next; and can avert the formation of mold and mildew. There are various insulation products that can be installed in the basement, although spray foam has quickly become the "product-of-choice" for professional contractors. Spray foam has been used in attics and roofs for decades, but has proven itself equally for the basement. For a number of reasons, basements have challenges that are unique to the space. As it turns out, spray foam insulation addresses those challenges much better than any other product. Spray foam does more in one single application that any other product on the market. It provides better R-Value insulation; it prevents moisture collection; and it effectively inhibits the movement of air. Most importantly, a proper spray foam application seals the basement walls completely - it prevents heat and cool loss; it allows for the HVAC unit to work more efficiently; and overall, it reduces energy consumption, and therefore reduces energy costs. In the basement, effective insulating is dependent on effective sealing. And to make sure the space is totally airtight, the most effective application is spray foam. An expert installer can seal up all the walls, the crawl spaces, and every little opening and hole. Even the hard-to-reach spaces can be sealed tight. Quite simply, there's no other insulation product, or mix of products that can compare with the effectiveness of a good spray foam install. Spray foam insulation is truly multi-purpose, which is why professional contractors are so impressed. It performs as an excellent air barrier, a superior moisture barrier, and the top-rated insulator. There is no requirement to pre-install a freestanding vapor barrier, which saves both product and labor costs. Finally, spray foam adds structural strength where its applied, adding to the many benefits when used for the basement walls. Although spray foam insulation is a more costly undertaking when it's compared to other applications, the benefits (both short-term and long-term) far outweigh the upfront cost. This is a home improvement investment: it lasts a lifetime; it requires no maintenance; and it never needs to be replaced or replenished. Professionally installed, spray foam insulation will deliver years of seasonal comfort, along with impressive energy cost savings.

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

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Central Ontario

29 Ferndale Industrial Drive
Barrie, Ontario
Canada L4N 9V5

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2 Guided Court
Etobicoke, ON
M9V 4K6

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GTA East

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

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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

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Niagara Region

25 Lincoln Ave
St. Catharines, ON
L2P 2C7

TOLL FREE: 1-800-265-1914


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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.

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.


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The Home Efficiency Rebate Plus program offers up to $10,000 in home reno rebates – and Great Northern Insulation can pave the way.


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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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