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Spray Polyurethane Foam Insulation. Insulation That Delivers Savings For The Long-term.

January 25, 2016

Depending on the age of a home, the size, the layout, and the actual construction, industry research shows that up to 50% of indoor air is leaking out of the home. It means that in winter, warm indoor air is leaking out, and in summer, cool indoor air is leaking. A home that is well insulated (and well ventilated) does not experience this kind of air leakage. For the professionals, indoor air that is heated or cooled is considered "conditioned" air - and for that air to leak out is simply a waste of money. On the other hand, a properly insulated home actually delivers energy savings and money savings annually. Deciding to install insulation is about value. It's a home improvement project that provides the homeowner with both short-term benefits and longer-term benefits. And here, Spray Polyurethane Foam is an installation that can do more with one application than any other insulation product on the market. Although SPF is more costly, the ongoing savings make the original project investment well worthwhile. Heating and cooling costs throughout the year will be reduced, and the so-called "payback period" on the investment becomes reasonable (from 2 to 7 years) - in short, the savings are significant. Essentially, Spray Polyurethane Foam requires one application. Clearly, the space being insulated will dictate the scope of the project - the roof and attic would obviously require a different approach than the basement or garage. SPF will not settle over the years (like many other insulation products) and will not need to be replaced, re-applied, or even topped up. Other insulation products typically require some type of replenishment every number of years just to maintain their insulation value. But with SPF, the long-term savings endure for many years after the initial application. It represents good value. Spray Polyurethane Foam delivers a good many homeowner benefits with each install. Insulation value is excellent; indoor air quality is improved; dust and airborne particles are diminished; and sound proofing is enhanced from the outdoors and throughout the home. Indeed, SPF provides higher R-Value than any comparable product or combination of products. Professionally installed, an SPF application will ensure that a space is completely airtight - preventing air movement, air leakage and unwanted moisture accumulation. It means that "conditioned" air is not leaking out during winter or summer. Today, Spray Polyurethane Foam is highly recommended by professionals for new builds, retrofits and renovations alike. It's an especially effective install for new construction, because it provides the opportunity to work from start to finish with maximum planning and installation. However, retrofitting and renovations also benefit greatly, particularly with a professional approach. And while a DIY (do-it-yourself) endeavor might save money, SPF requires experience and expertise for the best outcomes. The product is unique, the installation is complex, and there are project risks for the uninitiated. For the typical homeowner, professionalism brings more than just a high standard of work. Professionals follow the building code; they install based on manufacturer's specifications; and they provide product warrantees that assure years of product performance.

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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