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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 6 strategic branch locations, Great Northern is the largest diversified supplier of insulation services throughout the province.

Positions available:


Building Science/Building Envelope Professional

Great Northern Insulation is the industry leader in providing insulation products and building envelope consultation services to the residential, commercial and industrial marketplace in Ontario. With over 250 dedicated employees across 6 strategic branch locations, Great Northern is the largest diversified contractor of insulation throughout the province. Great Northern Insulation is looking for a Building Sciences and/or Civil Engineering student, recent graduate, or past graduate who is interested in joining our growing team.

Interests/areas of study will include:

Potential Candidates will:

Candidates of all educational completion levels are encouraged to apply, only successful candidates will be contacted.

Click here to apply

Sales Consultant

At Great Northern Insulation, your initiative can equal unlimited income. We are Ontario’s leading insulation provider with six physical locations. We are currently looking for accomplished sales consultants to close the deal with homeowners and building professionals. As a sales consultant, you will be responsible for generating revenue by developing market potential through forecasting, lead generation, qualification, and closing sales. The ideal candidate will have existing knowledge of the building envelope and insulation products.

We are currently recruiting Sales Consultants in the following business locations:

What we offer:

Your success is our success. That’s why we provide you with everything from a company vehicle to continued professional development. When you have an idea, we listen. Work where your voice will be heard.

What you’ll do:

Your skills/qualifications:

If this sounds like you, apply today!

Click here to apply

Insulation Installers/ Apprentices

Great Northern Insulation is Ontario’s largest building envelope specialist and insulation provider with six physical locations. From bungalows to high rises, we work in interesting places and spaces.

We are currently hiring Insulation Installers and Apprentices.

Standard Job Duties:

Work Environment:

The ideal candidate for this job will have:


Benefits of working at GNI:

When you have an idea, we listen. Work where your voice is heard.

Click here to apply

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 Jones 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

Eastern Ontario

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


Great Northern Insulation - Better Business Bureau Profile.


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.


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! 


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.

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