Call Now 1.800.265.1914

Many Homeowners Underestimate Basement Insulation.

January 26, 2016

It used to be that basements were just "leftover" spaces. Of course, there was room allocated for the water heater and the furnace equipment, and there was plenty of space for extra storage. Today, basement space is considered too valuable to remain "leftover" and a finished basement can add substantial living space to any home. In fact, a fully finished basement could often double the living space in a home. But the space has to be comfortable from season to season - and here, the bigger question is how best to make it so. Most insulation professionals will encourage homeowners to insulate their basements to the same degree as the rest of the house. This is good advice since the basement requires the same insulating approach as the roof, attic, or garage. Simply put, the basement should be properly sealed, properly ventilated, and properly insulated. All together, heating and cooling costs will be diminished; heating and cooling cycles will be better balanced; and the basement will become a comfortable living space season to season. For many years now, Spray Polyurethane Foam (SPF) has been gaining in popularity as a home insulation product. For the professionals, SPF has quickly become their "product-of-choice" - an ideal application for spaces like the attic, the garage, and the basement. When it comes to insulating, basements have unique requirements, and SPF is a product application that effectively addresses those requirements. Indeed, no other insulating product can do more with one installation than Spray Polyurethane Foam. SPF can do it all with one application. When professionally installed, the blanket of insulation works on several fronts: it makes for a totally airtight space; it provides exceptional R-Value; it stops moisture from collecting; and it restricts air movement. The basement will be better sealed than with any other insulation product on the market. The finished space will effectively prevent heat loss (and cool loss), and will contribute to enhanced energy efficiency with significantly reduced heating and cooling costs every season. Insulating the basement effectively is primarily about making the basement space airtight. With Spray Polyurethane Foam, that challenge can be achieved with one application. Everything is completely sealed - every hole, crack and crevice. And that includes all of the hard-to-access spots that are particularly unique to basement layouts. There's really no other insulation application than can seal like SPF, and hence, its become a favorite of processionals. The benefits of SPF go far beyond its insulating capacity. The finished "blanket" of insulation also serves as an air barrier and vapor barrier, and eliminates the need to have these installed separately. This is an application that will last a lifetime, without any need for additional maintenance, and without any need for replacement or replenishment over the long term. However, SPF is considered a premium application, and might be costly for some budgets. Regardless, the cost-benefit makes the investment worthwhile. Over the long term, Spray Polyurethane Foam delivers better product performance than anything comparable. With the basement well insulated, heating and cooling equipment operates more efficiently and energy usage is much better regulated. It all adds up to annual utility savings that can easily offset the original 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

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.

Please, enter a valid value

Incorrect values!