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From Top To Bottom, Home Insulation Needs a Professional Touch

January 23, 2017

A home that isn't energy efficient is wasting both energy and money. On the flip side, improved energy efficiency allows for reduced energy consumption and money savings on utility costs. For the average homeowner, there are countless energy upgrades and retrofits that will contribute to efficiency, savings and home comfort. Often, the dollar savings can offset the cost of upgrades.

Start things off with a Blower Door Test

Blower door tests are performed by Certified Energy Advisors approved by Natural Resources Canada. When expertly implemented, the blower door test is a good first step for any home. Vital information is gathered about the home's energy efficiency, and cost-effective fixes are offered in order to remedy weaknesses in the building envelope. The idea is for the homeowner to make the energy upgrades and/or retrofits that will deliver the very best return-on-investment. Best of all, "before and after" testing can accurately measure improvements and potential savings.

Determining the need for insulation removal

There are countless reasons for removing old insulation, and a professional assessment is the ideal approach in determining the need and extent of removal. Sometimes, old insulation is just damaged, perhaps because of water leakage or animal contamination. In some cases, insulation may contain material that is harmful, like vermiculite. The best approach for insulation removal is a professional approach - a comprehensive cleanup that is clean and safe, using equipment and techniques that will ensure total removal, and without disturbing the residents of the home.

Various product options for attic insulation

For optimum energy efficiency, an attic space should be sealed, insulated, and ventilated. There are a number of product options to choose from, although many professionals are suggesting spray foam insulation as the ideal. With spray foam, a thermal "blanket" is created that seals and insulates simultaneously. The entire attic space is blanketed, and every little crack gets sealed tight and properly insulated. Professionally installed, spray foam delivers exceptionally high R-Values, while blocking any air leakage and preventing undesirable moisture from collecting.

A viable option for insulating exterior walls

Old home or new, exterior walls can be reinsulated to enhance R-Value and energy efficiency. When expedited properly, insulated walls prevent indoor heated air from escaping in winter, and cooled air from escaping in summer. The "drill-and-fill" approach is both innovative and effective, allowing existing walls to be drilled, and then filled with loose fill insulation. With very little damage, cellulose insulation is blown into the wall cavities, providing enhanced insulation in a cost-effective manner. For homes with little or no wall insulation, this approach delivers results.

Insulating the basement for energy efficiency

In residential basements, controlling airflow and moisture is a prerequisite for ensuring energy efficiency. With spray foam insulation, everything can be accomplished with a single application. The space can be sealed airtight; moisture can be prevented; and high R-Value can be assured. A well-insulated basement provides enhanced energy efficiency for the entire home. And installing spray foam will ensure longevity - there's no need to replace or replenish the application. For the basement, spray foam insulation delivers long term benefits and excellent return-on-investment.

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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