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Build a safer, more sustainable future for our planet as a member of Ontario's largest building envelope provider.

We are hiring for roles across Southern Ontario.

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Whatever Your Passion, You’ll Find It Here.

Build your career with Ontario’s contractor of choice

Great Northern Insulation offers a challenging and rewarding career in a fast-paced, rapid-growth environment. If you are interested in building a rewarding career within a growing industry, send your resume or questions to careers@gni.ca. We thank all applicants in advance, but only candidates chosen for an interview will be contacted.

Company Profile: Great Northern Insulation is the industry leader in providing insulation products and services to the residential, commercial and industrial marketplace in Ontario. With over 250 dedicated employees across 7 strategic branch locations, Great Northern is the largest diversified supplier of insulation services throughout the province.

Our Values

  1. Exceed customer expectations
    by upholding our customer satisfaction guarantee, and offering the highest quality customer service from the first phone call to the (hopefully not) last good bye.
  2. Drive sustainable growth and development within the construction industry
    by listening to our partners, our customers, our investors, and the leading trends in the building sector.
  3. Empower our employees
    by encouraging: personal development; engagement and leadership in the building community, our company’s community and in their communities; and participation in how the company operates.
  4. Create safe environments
    by following the most recent and rigorous safety guidelines, ensuring that all of our employees have proper PPE, encouraging employees to speak up if safety is compromised, and training our employees with the safety of themselves and our customers above all else.
  5. Contribute to the circular economy
    by being conscientious of the impact that building practices have on the Earth and the people who live on it, and constantly seeking new ways to help the building industry transition to a low carbon economy.

Our Culture

We are a leading construction company with a family of more than 250 employees across southern Ontario. It grew from a crew of two. We work with homeowners, landlords, condo boards, homebuilders, contractors, facility owners, farmers, suppliers, and everyone in the building industry to make people more comfortable and lower greenhouse gases. This makes us a diverse group of people with ideas that are always appreciated. We exceed customer expectations, and our employees are our frontline. Because of that, we put our employees first, but we have expectations.

Our Expectations

No day is the same, and there is no end to opportunties for growth and learning on the job. We invest in our employees to make sure they are trained and ready for anything. Still, there are unique challenges to many of the jobs we undertake. This requires hard work, creativity and dedication. We strive to create a safe workplace, and will never ask emoloyees to do something unsafe, but not everyone can accomplish the work that we do. If you are up for the challenge, we aim to meet your expectations of us.


Great Northern Insulation is always looking for people with the motitivation and talent to bring new ideas and ways of doing things to the table.  It does not matter what your role is here, you will always have an opportunity to have your voice be heard by everyone. 

Here is what you can expect from us:

Plus these benefits when you work in the field:

There’s A Great Career Waiting For You At Great Northern Insulation.

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.


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.


Gold Certification promise

GREENGUARD® Gold Certification ensures the strictest criteria for low-level chemical emissions. Certified products are safe for individuals with sensitivities (children/elderly) and safe for use in school environments and health-care facilities. The product certification is widely recognized by the LEED Rating System (Leadership in Energy/Environmental Design).

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.


Multi-attribute product certification

ECOLOGOTM is an accredited sign of environmental performance – holistic – green – sustainable - and compliant with strict, third party standards. Life cycle criteria for product certification may include manufacturing and operations; health and environment; product materials and performance; and product innovation, development, and management.


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.

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