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Customer Promise

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 stand firmly behind the workmanship of our crews and we are 100% committed to delivering a reliable, high quality service to all of our customers. We are a proud equal opportunity employer.

Service Commitment – At Great Northern Insulation we are committed to achieving customer service excellence and we will work hard wherever possible to satisfy your home insulation requirements within 30 days of contacting our office.

If you contact us via our Customer Service Hotline 1-800-265-1914 or website, we will quickly have one of our Technical Service representatives contact you to setup a free in home visit.

Here at Great Northern Insulation we have an experienced, skilled and committed team of specialists with a well earned reputation for integrity and fair dealing within the industry.

Efficient Customer Billing - If you experience a billing problem call 1-800-265-1914 and our Customer Service Team we will make every attempt to resolve it on the spot. Where an instant resolution is not possible, your Technical Service Representative will call you within two working days with an action plan to resolve your query.

If the solution offered is not to your satisfaction, one of our experienced management team will personally call to resolve you query.

Installation Problem Resolution - If you are not 100% satisfied with our insulation install service please contact us immediately on 1-800-265-1914 to report your concern. We will endeavour to give you a solution on the spot and if we are not able to do so, we will arrange for your Technical Service Representative to visit your property to audit the work performed.

If, during this audit, an issue is identified immediate repair work will be scheduled and carried out at our cost.

Money Back Warranty
If your new insulation doesn't make your home warmer in the winter and cooler in the summer Great Northern Insulation will fix or replace it for free.

Product Warranty
All products installed by Great Northern Insulation are warranted by their manufacturer. The glass wool, castor-oil based spray foam and cellulose is warranted to last the lifetime of your property.

Sustainability Warranty
Our operating procedures aim to prevent pollution or any environmental harm through carefully prepared work and management practices. We are committed to not only the environmental laws, regulations and codes of practice but also to the moral laws of caring for, and looking after our environment.

At Great Northern Insulation we value our team ensuring all members have received adequate safety and confined workplace training, carry the required protective clothing and have been educated on the value of maintaining hydration.

Satisfaction Warranty
Our goal is 100% satisfaction. If a client has any issues with the service offered or quality of work undertaken Great Northern will replace or repair any issue to approved government standards at our cost.

Conditions of Guarantees and Warranties

  • You must make the claim within one month of the incident for which the claim is being made.
  • You must provide a copy of the original Great Northern Insulation invoice.
  • You accept that Great Northern Insulation at our sole discretion will decide whether to repair or replace faulty insulation.
  • Payment in full is necessary in order to initiate all Great Northern Warranties.
  • Additional terms and conditions are outlined on our quotations.
  • Guarantees and warranties are non-transferable.
  • Guarantees and warranties are subject to GNI's Terms and Conditions found at

Proudly Serving all of Southern Ontario

GTA; South Central Ontario

450 Industrial Dr.

Milton, Ontario

Canada L9T 5A6

TOLL FREE: 1-800-265-1914