Write a Review


InstagramFacebook
HomeStars
Insulation
Great Northern Insulation
Star Score
Learn more about how StarScore uses a complex algorithm which considers a company's review ratings, responsiveness, reputation, and recency.

94%

This is the average rating based on homeowner reviews.
This indicates how long it's been since the last review.
Indicates how well a pro reacts to reviews and review-related interactions with Homeowners.
How well a company responds to Service Requests and Reviews.
Reviews by rating (past 12 months)
Verified by HomeStars

Reviews for Great Northern Insulation

Average customer rating:
9.5 10 (900 reviews)

Sort by

Viktory1
Viktory1
0 reviews Halton Hills, ON
10/10

Attic insulation

Jermain and Jamal did some great work. Noticed our exhaust fan for bathroom was never installed. They installed it no problem. Great work by them. Good guys!

Approximate cost of services:
$1,600.00
Was this review helpful?
Company Response

Hi there, Thank you for your 10-star review, we’ll make sure to pass along your kind words to the team here at Great Northern Insulation. We are happy your home is more comfortable now.

Brent & Jena Foster
Brent & Jena Foster
3 reviews Minesing, ON
2/10

Horrible workmanship

Great Northern Insulation was initially hired by a contractor to reinsulate our attic space. Unfortunately to do this job we had to remove the roof to access the attic. Our roofing company came and removed the rear of the roof to give GNI full access to the attic to apply spray foam and loose fill on top, we were charged $6264.72 for insulation. No one from GNI communicated with us while they were here. They were done in only a few hours and left. Thought the job had been completed until mid November when we got a heavy snow load and there was a 2 foot hot spot section all across the front of our house. The insulation crew did not insulate the entire space, rather did just over half of the attic but charged for the entire square footage. When in communication with GNI they tried to say the space was blocked and they did not have access to reach the entire space. To fix it we had to remove the front of the roof to give them access a second time to get this area covered. There was nothing blocking them from doing it right the first time, just laziness; and they had every excuse in the book. They had the audacity to send an invoice for the second application when they had already been paid in full to do the job the first time, this time charging an additional $2825 to repair. They were also to remove the old insulation from the property when the job was complete. Great Northern refuses to take the old insulation with them and instead left it in my driveway. So after all of this and now having paid them $9089.72 for insulation, there is still a hot spot across the roof where they still havent done it properly and I have to figure out how Im going to dispose of the old insulation. They dont care about their workmanship and wont take responsibility for it either. For your own sake, do NOT hire this company!

Approximate cost of services:
$9,089.00
1 of 1 people found this review helpful.
Was this review helpful?
Private User
Private User
Private User reviews St. Catharines, ON
10/10

Attic insulation

We had additional insulation blown into our attic, as well as additional insulation added to two hatches. The team was on time and efficient. They did a great job and cleaned up after themselves. Our house is now a lot warmer.

Approximate cost of services:
$2,500.00
Was this review helpful?
Company Response

Thank you so much for leaving this kind review. We really appreciate you being our customer and are glad we were able to meet your expectations! Thank you for choosing the team at Great Northern Insulation.

Amrish
Amrish
0 reviews Whitby, ON
10/10

Attic insulation

Very professional services and crew worked beyond expectations. All work was done on time and entire process was very satisfactory.
Crew protected all carpet and stairs area with protection cloth and vacuum the place if any debris there.
We are very happy with the Great Northern Insulation company and their crew.
Work was done on time and price was very reasonable.

We would definitely recommend anyone who need to use their services.
Thank you,
Amrish Patel

Amrish Patel

Approximate cost of services:
$306,894.00
Was this review helpful?
Company Response

Thank you very much Amrish for choosing the team at Great Northern Insulation, and for taking the time to share your feedback with us. It means so much when our best customers share their experiences. We are very grateful for your business.

Private User
Private User
Private User reviews Toronto, ON
9/10

Good work!

Installers:
These guys are a v v important part of the process. Thankfully, my 2 guys Jermaine and Jamal answered all my questions patiently, which i most appreciate. They took awhile to get started, which i didnt understand. However, then they put the time into the job, which seemed appropiate. Really, time will tell how the job was done.
One minor suggestion is for them to have a few more screw drivers on hand just incase.
Sales guy:
Again, this person, Alex, answered all my questions patiently. One suggestion for future clients is to have Alex view all parts of the attic so that no surprises come up.

Again, this person, Alex, also answered all my questions patiently. I would just suggest that

Approximate cost of services:
$4,000.00
Was this review helpful?
Company Response

Thank you very much for your feedback. Your opinion is valued greatly and it helps us improve our standard of service. We truly appreciate your business. Thank you for choosing Great Northern Insulation.

Private User
Private User
Private User reviews , ON
10/10

Screened Porch Winterizing

Very pleased with GNI all around. Prompt quoting, sensitive to adapting to COVID schedule changes, once booked they adhered to schedules and plans, friendly and knowledgable staff, tour of the finished product at completion, thorough clean-up afterward, minor overspray issue was dealt with promptly. We would recommend them without reservation.

Approximate cost of services:
$10,000.00
Was this review helpful?
Company Response

Thank you very much for choosing the team at Great Northern Insulation, and for taking the time to share your feedback with us. It means so much when our best customers share their experiences. We are very grateful for your business.

JW in Toronto
JW in Toronto
0 reviews Kawartha Lakes, ON
10/10

New Home Complete Insulation

Great job with high attention to detail and products used. Have built many custom homes and GNIs work was excellent at a fair price.

Approximate cost of services:
$16,000.00
Was this review helpful?
Company Response

Thank you for leaving us such a kind review, we truly appreciate your business. Thank you for choosing the team at Great Northern Insulation.

Willie in Toronto
Willie in Toronto
0 reviews Toronto, ON
10/10

Attic insulation

GNI workers are very pleasant and professional.
All issues were dealt with in a timely manner.

Approximate cost of services:
$4,000.00
Was this review helpful?
Company Response

Thank you very much Willie for your positive feedback. Your opinion is valued greatly. We truly appreciate your business.

Darlene from London
Darlene from London
0 reviews London, ON
10/10

Attic insulation

Great job. Thorough and clean. No damage to anything. Very satisfied. Guys were friendly too.

Approximate cost of services:
$2,500.00
Was this review helpful?
Company Response

Hi Darlene, Thank you so much for this review. We really appreciate you being our customer and are glad we were able to meet your expectations!

Des
Des
1 review London, ON
10/10

Attic Insulation

Guys showed up and went right to work . Evident that they knew what they were doing. Protected floors and carpets on way in and out , were friendly, accommodating and cleaned up after they were done, not to mention I noticed difference walking upstairs the same day. Great job and highly recommend. Thanks !!

Des Chin Sang

Approximate cost of services:
$1,700.00
Was this review helpful?
Company Response

Hi Des, Thank you for your thoughtful review. We’ll make sure to pass along your kind words to the team here at Great Northern Insulation. We are happy your home is more comfortable now. Thanks again!

The reviews on this page are the subjective opinion of the Author and not of HomeStars Inc.

More about Great Northern Insulation

For over 40 years, we have helped Ontario homeowners and builders build safer, more energy-efficient and sustainable communities. With a broad range of products and services, we are your insulation experts for existing home renovation upgrades and new residential home construction—satisfaction guaranteed. Proudly serving all of Southern Ontario, we are Ontario's largest insulation company and are Energy Star and Foam Masters™ certified. Get in touch for a Free In-Home Assessment—contact us today to learn more.

CATEGORIES
Home Inspection, General Contractors, Renovation Advisors, and Insulation
PRODUCTS
✓ Spray Foam (1/2 lb open cell) ✓ HFO Spray Foam (2 lb closed cell), ✓ Cellulose (Blown and dense-pack) ✓ Fibreglass (Batts, blown and blanket wrap) ✓ Mineral Wool (Batts) ✓ Hemp (Batts)
SERVICES
We install insulation throughout the home: ✓ Attic Insulation ✓ Walls Insulation ✓ Basement Insulation ✓ Crawlspace Insulation ✓ Garage Insulation ✓ Floors Insulation
BRANDS
We offer high performance, brand name insulation backed by third party warranties. Our certified installers are professionally trained to install all types of insulation.
SPECIALITIES
Spray Foam Insulation, Blown Fibre Insulation, Air Barriers, Old Insulation Removal, Air Sealing & Draft Proofing, Fire Protection, Batts & Vapour Barriers, Specialty Coatings, Soundproofing, Thermal Barrier, Under Slab Insulation.
WEBSITE
https://www.gni.ca/
YEAR ESTABLISHED
1980
NUMBER OF EMPLOYEES
300
LIABILITY INSURANCE
Yes
WORKERS COMPENSATION
Yes
WRITTEN CONTRACT
Yes
WARRANTY TERMS
https://www.gni.ca/about/service-commitment-great-northern-insulation
Company profile information is not moderated by HomeStars. Ask the contractor to verify before hiring.