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Upgrading Home Insulation Can Make a Big Difference

February 26, 2017

Upgrading existing insulation in a residential home will dramatically decrease energy usage, and noticeably reduce utility bills. Today, one of the better options is spray foam insulation - a high performance product that delivers more benefits than comparable insulation products. Spray foam is a premium application, but with long-term results that make the initial investment well worthwhile. With a professional installation, the spray foam option makes it possible to focus on the areas of the home that are most vulnerable to energy loss. In this way, the primary sources of energy waste can be fully addressed, and going forward, other areas of the home can be tackled.

Insulating the attic and roof cavity

With the attic being a major source of heat loss in any home, insulating with spray foam offers an all-in-one approach - it's an air barrier, vapour barrier, and thermal insulator at one time. In fact, air sealing and insulating the attic floor is one of the best options for improving energy efficiency. It will quickly translate into one of the best returns-on-investment for the home. One way for a homeowner to save money, especially with spray foam, is to insulate in steps. This will allow a contractor to install spray foam incrementally, yet deliver results even after the first application.

Insulating rooms over the garage

Rooms over garages are often uncomfortable. They are either very hot or very cold, depending on the season. The cause is air leakage coming in and out of the garage below. Here, conventional insulation doesn't seem to do the job because the space cannot be sufficiently air sealed. This is where spray foam can really perform. The application adheres completely to the garage ceiling, providing an effective air seal that is continuous. When properly applied, every gap, opening, and crack is sealed, minimizing air leakage, controlling air moisture, and providing high R-Values.

Insulating exterior walls in the home

In homes where exterior walls are inadequately insulated, increasing the R-Value can make a big difference with heating and cooling bills. The "drill and fill" approach will better insulate a home, without having to do a major renovation. With this retrofit, the wall cavities are filled with loose-fill insulation throughout the exterior of the building structure. In this way, a thermal barrier is created, without any structural change. "Drill and fill" is possible from the interior of the home or from the exterior. And with R-Values significantly upgraded, the energy savings are considerable.

Insulating basement foundation walls

In most residential homes, approximately 30% of overall heat loss is through the basement walls. There are a number of conventional approaches to upgrading basement insulation, but more and more contractors are recommending spray foam. With one application, spray foam can do it all: it provides an insulating envelope; an air barrier; and a vapour barrier. In spaces like the basement, all three components are necessary in providing maximum energy efficiency. With a spray foam application, air movement is blocked, air moisture is prevented, and insulation is optimized.

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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