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Thermal Insulation and Air Barriers are an Energy-Efficiency Priority

August 05, 2017

Every home will experience the dynamics associated with indoor airflow – there’s winter heating, summer air conditioning, even flow-through breezes when the windows are open. For the professionals, airflow is part of a bigger picture, encompassing indoor ventilation, thermal insulation, and air barriers. It’s a big picture because airflow will affect everything – the moisture in the air, the oxygen in the air, and the contaminants found in the air.

Interior airflow throughout a house is managed and maintained by the installed home insulation and air barriers in the building structure. Air barriers are designed to maintain proper airflow between the inside of the house and the outside. And while air barriers are not top-of-mind like home insulation, they are just as essential. Insulation and air barriers work together to ensure performance - the key, of course is an air barrier system that is airtight.

Replacing/upgrading Home Insulation and Air Barriers

When a house is cold in winter, warm in summer, and uncomfortable the rest of the year, it may be time for a remedy. The fact is, effective air sealing and high performance insulation can make things right – balancing indoor comfort season to season; enhancing the overall energy efficiency of the home; and reducing air barriers torontoenergy costs by up to 25% annually. In short, quality insulation and air barriers will serve to improve both energy efficiency and home comfort.

New home or old, there are a variety of reasons to replace or upgrade insulation and air barriers. On inspection, a home may simply have insulation that is deficient. In some cases, insulation may have been improperly installed. In other cases, existing insulation may be damaged or failing. The good news is that upgrading and retrofitting can make for dramatic improvements overall. In fact, improving home insulation is one of the best returns-on-investment.

The Benefits of High Performance Insulation

For optimum energy-efficiency, thermal insulation and air barriers should be working together. This is where spray foam insulation can really perform - it’s an insulator, air barrier, and vapour barrier in one. And when professionally installed, it provides effective airtightness, superior R-Values, and maximum energy-efficiency. Compared with other products and installations, spray foam rises above, with better performance, and a much longer lifespan. 

At Great Northern Insulation, spray foam insulation continues to be the product-of-choice for homes large and small. The benefits of the product make the initial investment very worthwhile.

            •  Heating and cooling costs are measurably reduced annually

            •  Winter heating and summer cooling are far better balanced

            •  HVAC equipment (heat, cool, ventilate) works much better

            •  Air drafts, cold areas, and hot spots are entirely eliminated

Home Energy Solutions from Great Northern Insulation

In Toronto and throughout the GTA, Great Northern Insulation provides professional home energy solutions. Highly qualified installers emphasize every aspect of energy efficiency – from air sealing, to insulation, to ventilation. And with GNI, homeowners are assured of 100% satisfaction. To find out more, call 1-800-265-1914 or visit the company website at www.gni.ca.


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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