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Quick And Easy Energy Upgrades For Any Home

February 13, 2017

Regardless of the type of energy upgrade in a home, every piece of work will help. From draft proofing, to air sealing, to insulation, to ventilation, homeowners can benefit from upgrades that improve home comfort and boost energy efficiency. Best of all, with meaningful energy upgrades, energy usage is lessened, and the cost of utilities is reduced season to season, through the year.

Exterior wall insulation

Inside a home, exterior wall insulation can be accomplished with a "drill and fill", where the wall cavity is effectively filled with loose-fill insulation. This is an ideal insulation retrofit, with little damage to the interior of the home, and with measurable enhancement to the home's R-Values.

Insulating the garage

Insulating an attached garage benefits living spaces inside the home that are in close proximity. Cold air is blocked from entering the home, and warm inside air is prevented from escaping. If there is a living space right above the garage, that space will be more comfortable year round.

Sun control window films

Residential window films are designed to block out solar heat and ultra-violet rays. Window films reduce home cooling costs and keep the room temperature consistent. When properly applied, films will reduce "solar heat gain", and the cost of air conditioning can be measurably lessened.

Draft proofing/weatherizing

Draft proofing and weatherizing measures are viable home improvements that will contribute to energy efficiency. The idea is to ensure airtightness throughout the building "envelope", with effective caulking and weather-stripping for windows and doors. It all diminishes air leakage.

Properly insulating the attic

The attic is the main source of heat loss and moisture loss in a typical home. The space must be tightly sealed, even before any insulation material is installed. Spray foam is an ideal application for the attic, providing an air barrier, vapour barrier, and insulation barrier all at one time.

Basement wall insulation

Heat loss in the basement is significant in any size home. Here, it's important to have an effective insulating envelope, air barrier, and vapour barrier. Working together, these will serve to prevent air leakage and moisture accumulation, while providing a high degree of thermal insulation.

Preventing "air infiltration"

A "blower door test" can accurately gauge the extent of "air infiltration" in a home and pinpoint the specific areas that need remedying. After the test, recommendations are made on the specific remedies that would best suit the weaknesses (draft proofing, sealing, weatherizing).

Improving indoor ventilation

Well-balanced indoor ventilation contributes to better energy efficiency and more home comfort. This is where a qualified contractor can assess indoor air circulation, and can suggest upgrades for improved performance. Ventilation can make a valuable contribution to energy efficiency.

Blown wall cavity insulation

In wall cavities, both interior and exterior, blown insulation has advantages over batt insulation. Inside a wall, air pockets are significantly minimized and air leakage is diminished. At the same time, blown insulation enhances R-Value per inch, which serves to limit conductive heat loss.

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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