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Energy Saving Solutions That Will Save Money And Enhance Home Comfort

Insulation products are designed to save energy while enhancing home comfort. And insulating the home is one of the most cost-effective improvements a homeowner can make. When a home stays warm in winter and cool in summer, without unnecessary energy loss, the utility savings are significant. And every home can benefit - whether it’s a new build, a renovation or a retrofit.

Basement / Crawl Space
Thermal Barrier over Spray foam
Sound Proofing
1ST/2ND Floor
Drill and Fill
Bonus Room
Window Films
Air Sealing Draftproofing

In the basement, the concrete floor transfers cold from the ground below. This results in a cold floor and an uncomfortable space. Here, the ideal solution is to create a “thermal break” by applying spray foam into the floor gravel before pouring the final concrete covering. With this application, the concrete floor covering will hold the indoor heat, and consequently create a warmer, more comfortable indoor environment. This is the ultimate basement insulation, inhibiting airflow and moisture collection, while insulating at the same time.

In practically every home, at least 30% of heat loss is from the basement. In addressing this issue, more and more insulation contractors are installing spray polyurethane foam insulation (SPFI) into basement walls. In one application SPFI provides an exceptional insulation envelope, an effective air barrier, and an equally effective vapor barrier. For the optimum in insulation, contractors are also insulating basement floors – this serves to inhibit any air movement, prevent moisture accumulation, and insulate like no other product.

Where spray foam insulation is not fully covered by drywall, a thermal barrier (or fire barrier) is an absolute requirement of the building code. Drywall (gypsum board or sheetrock) is an approved thermal barrier. In the event that there is no drywall, a spray applied thermal barrier can be applied over the spray foam to meet the required building code. Here, a professional approach is highly recommended so that the right product and install are employed. In addition, it’s important to satisfy the building code, while ensuring safety for occupants.

When a garage is attached to a home, it’s a requirement of the building code that the space be “gas proofed” with respect to the living areas of the home. This is best accomplished by installing spray polyurethane foam insulation (SPFI) to cover the walls and garage ceiling. Where living areas are in close proximity, this application will help to seal off gasses, as well as cold air in the winter and warm air in the summer. Where there is a “bonus room” above the garage, that room will be warmer and more comfortable. SPFI does a better job here than other conventional insulation products.

In many residential homes, as well as multi-tenant buildings, a quiet indoor environment is desired. There are various sound proofing measures that can be employed to reduce sound transfer between walls, ceilings, and floors. Indeed, soundproofing can improve occupant comfort in a private home, and particularly where individual residential units are under the same roof (and in proximity). Depending on a building’s structure, layout and size, a professional insulation contractor can recommend an insulating product that will best suit.

Every home and building structure suffers from the “stack effect”. Simply put, the “stack effect” occurs when air moves upward from the bottom floors, travels to the top floor, and leaks out of ceiling, window and other accesses. Here, the appropriate solution is comprehensive air sealing. Windows and doors are sealed with weather stripping, and additional “air leaks” are sealed up with an expansion-foam product. The result: unwanted air movement is curtailed, indoor comfort levels are enhanced, and energy savings are realized.

“Drill and fill” is usually a retrofit upgrade that will allow a home to keep heated (and cooled) air inside. In this installation, holes are drilled in between wall studs, and the wall cavity is filled with loose-fill insulation. Loose-fill insulation is the ideal product option - it’s blown into the wall, and easily conforms to the cavity space, without disturbing anything structural. The “drill and fill” install can be performed from the inside of the home or from the outside. In the end, insulation values are upgraded and energy savings are measurable.

Very often, the so-called “bonus room” (above the garage) is the coldest room in the house in winter. This is a problem that’s easily rectified, and can be solved with one product application. Using spray polyurethane foam insulation (SPFI), the entire under-side of the garage ceiling is coated. It provides the highest R-Value of any comparable product, and results in reduced heating costs during the winter season. But in addition to ongoing cost savings, there is enhanced comfort in the “bonus room” itself, as well as the rest of the home.

3M™ Window Films are specially designed to rebuff solar heat, while blocking harmful UV rays at the same time. They can be installed without altering the appearance of the window. 3M™ Window Films contribute to energy savings by reducing cooling costs. They substantially reduce fading of carpeting and furniture, and serve to keep room temperatures consistent. By reducing solar heat gain, these window films reduce energy costs related to air conditioning. 3M™ Window Films are high quality, and covered by the full 3M warranty.

Air sealing, draft proofing and weather stripping are all relevant home improvements with valuable payoffs. And it pays to have a “strategic” approach for each – in other words, choosing the right product and install for the job to ensure maximum results. A wide range of solutions is available for residential and commercial applications - spray foam for airtightness and thermal insulation; caulking and weather-stripping for doors and windows; even window “mullion injection” for more specialized installs. It’s all designed to save energy.

Industry research shows that the attic is a primary cause of heat loss, air loss and moisture loss. As such, the attic space must be “air sealed” – and that means either strategically using spray foam to seal up any visible openings, holes and penetrations, OR using professionally applied spray foam throughout the entire attic floor. The idea is to create an airtight seal. augment insulation levels AND create an air/vapor barrier in one shot. After strategically air sealing the attic space, loosefill fiberglass or cellulose can be blown in on top of the spray foam to increase the overall R-value. Alternatively, spray foam can be used as the sole means to achieve the desired R-value. For a total “system”, added soffit ventilation will deliver both home comfort and energy efficiency. Depending on the conditions, a full removal of existing insulation may be required.

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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