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Don't Finish the Basement Without Properly Insulating

December 21, 2015

Traditional basements are a primary foundation in most parts of Canada and in many parts of the northern United States. Needless to say, regional climates in those parts present very cold winters and serious bouts of frost. The truth is, whether its winter or summer, basements are at the forefront of problems. Water entry is often problematic. Hot temperatures, cold temperatures, and high humidity are also problematic. And in worst case scenarios, mold can be the source of poor air quality and unhealthy living conditions. Renovating the basement should not only be about cosmetics. A proper renovation should efficiently seal the space - provide effective moisture-protection - and install quality insulation. The finished space should provide added home comfort, reduced energy costs, and much improved indoor air quality. And in terms of project budget, insulating the basement should deliver a reasonable "payback" period on the initial project investment. Renovating or retrofitting, basement insulation should be handled professionally. Finishing the basement without properly insulating is just short-sighted. A well insulated basement will keep warm in the winter and cool in summer. And it's a space that should be as well insulated as other parts of the home. A professional installation, with a high quality product, will bring both short term and long term benefits to the entire house. R-Values will be dramatically improved. Airflow and air leakage will be prevented. And importantly, moisture collection will be averted. Overall, the home will be energy efficient. When a basement is energy efficient, the entire home benefits. Energy consumption is moderated; heating and cooling bills are reduced; and annual savings help to pay off the original project cost. In general, the savings will depend on the amount of work performed, on the quality of the insulation product, and on the installation method. And while every basement is physically different, a professional install is highly recommended - its the best way to assure product performance and to derive the longest lifespan for the project. Even before insulating, a basement renovation should ensure that there is no water intrusion. Water entry is something that requires proper restoration and resolution prior to insulating. As well, renovating and insulating should be according to the building code, and in most cases, a good insulation contractor will insist. Indeed, with a good contractor on board, much better decisions can be made about the right product and right installation for the home. Spray Polyurethane Foam, for example, has proven itself ideal for the basement. Today, many expert installers are recommending Spray Polyurethane Foam for basement insulation. It's an application does more with one install than any other insulation product. It makes the space totally airtight space. It doesn't allow for unwanted moisture to collect. And it will insulate with the highest R-Value. It is, however, a premium product, and might not suit all budgets. But SPF can be effectively combined with other insulation products and can deliver excellent results and cost effectiveness. Like any home improvement project, basement renovation along with basement insulation is worth doing right the first time - and the results will bear fruit.

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


Great Northern Insulation - Better Business Bureau Profile.

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

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

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

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™.


We are Verified & Bonded by eRenovate. When you choose to proceed with our services through their platform, you receive the gaurantees set forth through their program.

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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