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How to Avoid Contractor Scams

April 10, 2019

Above all else, Great Northern Insulation values the trust that all of our customers put in us to go above and beyond in all of our communication, installations, and follow-ups. Our sales consultants, customer experience team, insulation installers, and staff throughout our organization receive glowing, personalized reviews from many of our customers. We would not have it any other way. Unfortunately, there are people with no affiliation to Great Northern Insulation who take advantage of the trust that you have placed in us. We want to help you avoid contractor scams.

How to Avoid Contractor Scams

The Story of a Contractor Scam

Recently, a homeowner was receiving what they thought was an air duct cleaning service. The person who claimed to be cleaning their air ducts also claimed that they worked for Great Northern Insulation, and asked to see her attic. Upon ‘inspection’ she was told that she would benefit from a top-up. She agreed, especially with the rebates available. After the installation was complete, she noticed that the quality of the install was not to the standards that she expected from Great Northern Insulation.

She was right to be suspicious – it was not an employee of Great Northern Insulation that she had spoken to. Luckily, she contacted the police and informed us of the scam.

We do not want the same to happen to you. Unfortunately, scammers are good at what they do, and it can be easy to become a victim of misrepresentation. That is why it is always important to be certain you are dealing with the contractor you believe you are dealing with. So, what are some steps you can take to prevent contractor scams?

Three Steps to Avoid Contractor Scams

1. Make Sure It’s A GNI Employee

There are a few ways to make sure you are speaking with one of our sales consultants. First, our sales consultants will always leave behind a GNI branded business card, complete with their phone number and work email (granted, they may occasionally have run out because of a busy day!). If they do not leave a business card behind, they should still leave you with their contact information, including their work email address. Their email address will always end with our domain, ‘@gni.ca’. If you are suspicious at all, you can always contact us to double check.

2. Understand Our Quoting Process

At Great Northern Insulation, transparency is something we hold dear. We send you a full quote broken down by each item, so you can select exactly what you want for your home. After you have accepted the quote, we schedule the work to be done on your home with trained insulation installers. The sales consultant will never install insulation. In the story above, the person who sold the homeowner the insulation also installed it, and although the quote had “GNI” written on it, it did not contain our official letterhead.

3. Do Your Research on the Contractor

Before moving forward with any contractor, you should always do your research. Never accept a quote on the spot. It might be difficult to conduct quality research on a newer company, or a mom and pop shop, but established companies will have thousands of reviews that are easy to find. You can find a lot of useful information in these reviews, including personal experiences with the company. If your experiences are different – like someone only accepting cash or pressuring you to pay cash – take this as a red flag.

At GNI, we have a customer experience team dedicated to answering your calls and questions. If you still have questions, you can always contact us by calling 1-800-265-1914.

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

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

Greater Toronto Area

2 Guided Court
Etobicoke, ON
M9V 4K6

TOLL FREE: 1-800-265-1914

GTA East

103 North Port Road
Port Perry, Ontario
Canada L9L 1B2

TOLL FREE: 1-800-265-1914

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

Niagara Region

25 Lincoln Ave
St. Catharines, ON
L2P 2C7

TOLL FREE: 1-800-265-1914


Great Northern Insulation - Better Business Bureau Profile.

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

Trusted for Over 40 Years

Over 40 Years in Business

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.

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

January, 2021 regulatory phaseout of hydrofluorocarbons (HFCs) with the introduction of WALLTITE CM01. Using hydrofluorolefins (HFOs) with lower global warming potential (GWP) compared to HFCs, WALLTITE CM01 is the next generation of spray foam insulation.



Heatlok® Soya HFOTM leverages Honeywell’s latest Solstice® Liquid Blowing Agent technology. This new hydrofluoroolefin (HFO) blowing agent is the most environmentally conscious blowing agent produced to date, with a zero ozone depletion potential (ODP) and a global warming potential (GWP) of 1, which is more than two orders of magnitude (99.9%) lower than HFCs used in this industry.


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).

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 Home Efficiency Rebate Plus program offers up to $10,000 in home reno rebates – and Great Northern Insulation can pave the way.


Great Northern Insulation proudly abides by a renovation-specific Code of Conduct set by RenoMark™.


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The GNI crew have been featured installing insulation on Love It or List It - have you seen our logo in an episode?

Climatizer Cellulose


CLIMATIZER PLUS cellulose insulation is manufactured from a minimum of 85% locally-sourced post-consumer recycled newsprint. Non-toxic additives are applied to the uniquely fiberized paper generating a building material with superior thermal and acoustic properties, as well as exceptional resistance to fire, moisture, mould and pests.

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