Customer Ratings and Reviews
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Erin Bowen on Google
(March 3, 2021, 11:45 pm)I had a home evaluation for my "cold room". I was given great advice and professional service even if the plan did not include insulation install right away. I very much appreciated the time the consultant took to explain everything and to suggest best solutions. Thankyou for being honest and not just trying to make a sale!
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Stephen Lockyear on Google
(January 18, 2021, 5:50 pm)Had our garage insulated with foam. Excellent job, great crew & reasonable price
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Richard Norton on Google
(July 30, 2020, 5:45 pm)Great Service and execution; thanks to GNI to doing exactly what they said they would do. Fair pricing and showing up on time and delivery of quality workmanship and clean up was important to me. Thank you Mike, Bob and helper for no nonsense experience. I highly recommend GNI for your insulation installations.
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Steve Nicholls on Google
(March 6, 2020, 2:55 am)I was extremely satisfied in my experience with Great Northern Insulation. From their sales representative Eric, their office manager Kelly, to their installation team Bill & Chris; they were professional, courteous and most of all on time! The quality of their spray foam installation was the best I have seen.
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Bonnie French on Google
(October 22, 2019, 11:16 pm)We are very pleased with the job that Great Northern Insulation did for us. From the day Eric visited us and helped us plan out what we needed to do to make our home more efficient, to the great job done by Dave and Shawn M; we would recommend them to anyone who needed to upgrade the insulation in their home. Kelly was easy to reach by phone to answer our questions. We are looking forward to enjoying a much warmer home.
Photos of Great Northern Insulation
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Photo by Stephen Lockyear (Show full size) 
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Questions & Answers
What is the phone number for Great Northern Insulation?
The phone number for Great Northern Insulation is (800) 265-1914.
Where is Great Northern Insulation located?
Great Northern Insulation is located at 103 N Port Rd, Port Perry, ON L9L 1B2, Canada
What is the internet address for Great Northern Insulation?
The website (URL) for Great Northern Insulation is: https://www.gni.ca/
What days are Great Northern Insulation open?
Great Northern Insulation is open:
Monday:7:30 AM – 5:00 PM
Tuesday:7:30 AM – 5:00 PM
Wednesday:7:30 AM – 5:00 PM
Thursday:7:30 AM – 5:00 PM
Friday:7:30 AM – 5:00 PM
Saturday:Closed
Sunday:Closed
North Port Steel Ltd