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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

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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