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Certified Energy Advisors Accredited by National Resources Canada (NRCan)

January 16, 2017

Certified Energy Advisors specialize in conducting EnerGuide Home Evaluations, expedited by licensed service organizations that are accredited by NRCan. Advisors provide third party advice to homeowners interested in improving home energy efficiency, and reducing home energy use. As well, evaluations are conducted with builders who want to incorporate the EnerGuide Rating System when planning and designing new construction. Advisors ensure that homes labeled as "Energy Efficient" meet the standard requirements as defined by National Resources Canada. Certified Energy Advisors must work alongside a licensed service organization that has been duly accredited by NRCan. Advisors have passed a number of qualifying exams, and are proficient with the EnerGuide Rating System. In the interest of the homeowner, energy advisors are registered with NRCan. They must demonstrate a knowledge and experience base in a number of areas:

  • Energy efficiency renovation and retrofitting
  • Residential building/construction materials
  • Residential heating, cooling, and ventilation
  • Building sciences (the "house as a system")
  • Residential building/construction practices

Energy advisors are focused on rating energy efficiency in a residential home. Amongst the many measurements, an inspection quantifies air leakage; insulation performance; air ventilation; and the efficiency of the HVAC system. Assessment results are rendered in a comprehensive report, which serves to define the energy efficiency of a home - it's referred to as the Energy Rating. From the homeowner's point of view, the main aim of energy efficiency is to consume less energy from season to season. It means that heating and cooling costs will be reduced, and demand on the province's energy resources will be lessened. Beginning in 2017, Energy Ratings will reflect the new EnerGuide Rating System, indicating the annual amount of home energy consumed. For many a homeowner, the amount of annual energy used may be a shock. Importantly, the new rating system will identify any upgrades/retrofits that will improve a home's energy efficiency. When a home energy evaluation has been completed, the report will highlight potential areas for improvement: heat loss; air leakage; R-Value performance; and moisture accumulation. Along with recommendations from the Energy Advisor, homeowners can decide on various retrofitting fixes that can be undertaken. The idea, of course, is to target energy-efficiency weaknesses and make every effort to reduce seasonal energy usage, while reducing heating and cooling costs. For many homeowners in Ontario, 2017 signals an opportune time to make energy upgrades, and take advantage of various rebates and incentives offered by the province. Hiring an approved contractor, homeowners have a range of upgrades and retrofits that can be undertaken, all of which would contribute to energy savings throughout the year:

  • Augmenting the home's attic insulation
  • Boosting R-Values throughout the home
  • Air sealing and/or weatherizing the home
  • Installing/improving basement insulation
  • Retrofitting the exterior wall insulation

In the near term, most residential homes will require the EnerGuide Rating (and Label of Proof) in order to authenticate energy efficiency. In fact, this will be a requirement when selling a home so that prospective buyers can be assured of a home's official energy performance.

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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