Nothing insulates better than spray foam

Great Northern Insulation is Canada's largest full service insulation contractor. Over the past 35 years our 100% Canadian owned and operated company has become the leader in the Home Comfort Industry.

  

We are your one stop shop
for all of your insulation
& building envelope needs

  

MAKE YOUR HOUSE SNUG AND SAVE!

Thinking about home renovations? With the Home Reno Rebate from Union Gas, you can get cash back for upgrades that will lower your energy bill, increase the value of your home, and keep you more comfortable all year round.
REGARDLESS OF THE SEASON, KEEP THE COMFORT INDOORS…

We are the 'industry professionals'

Great Northern Insulation is Canada's largest full service insulation contractor. Over the past 35 years our 100% Canadian owned and operated company has become the leader in the Home Comfort Industry.

  

WE INSTALL ANY KIND OF INSULATION
TO ANY TYPE OF BUILDING
anywhere in Ontario

  

Welcome to

Great Northern Insulation

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.

  • Trusted for 35 years

  • Industry Leading Professionals

  • Licensed & Certified

  • 100% Satisfaction Warranty

Building/Renovating your own Home?

Request a Free In-Home Assessment

Are you an Industry Professional?

Learn why GNI is the right fit for your professional needs! Click here

  • Insulation Products

    At Great Northern, our goal is the same as our customers': cost effective alternatives and solutions while maintaining the highest levels of performance for their budget.

    Learn More
  • Customer Promise

    Great Northern Insulation is Canada's largest full service insulation contractor. Over the past 30 years our company has become the leader in the Home Comfort Industry.

    Learn More
  • Watch What We Do

Proudly Serving all of Southern Ontario

GTA; South Central Ontario

450 Industrial Dr.

Milton, Ontario

Canada L9T 5A6

TOLL FREE: 1-800-265-1914