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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

Southwestern Ontario

7035 Industrial Drive
Comber, Ontario
Canada N0P 1J0

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

GTA East

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


Great Northern Insulation - Better Business Bureau Profile.


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

Best of 2018

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!

Homestars Best of 2019 Award

Best of 2019

For the third year in a row, HomeStars ranked Great Northern Insulation at better than 95% for customer satisfaction.

Homestars Best of 2020 Award

Best of 2020

For four years now, HomeStars has ranked Great Northern Insulation at better than 95% for customer satisfaction.

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

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

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

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).


Baeumler ApprovedTM
Professional, Certified and Insured

Baeumler ApprovedTM gives you peace of mind when connecting with contractors, trades and home service providers. All Baeumler Approved members have demonstrated high quality work for customers and other trade professionals. Members must also have Workers Compensation, liability insurance of at least $1,000,000 and prove professional certification.

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 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.


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?

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