Matt and John did an excellent job with the spray foam insulation in my attic. They were very professional, thorough, and clearly took pride in their work. What impressed me the most was how carefully they worked around all the tight and difficult areas to make sure everything was properly sealed.
They didn’t just spray the easy spots—they made sure the hard-to-reach areas, pipes, and corners were well covered so the space is fully air-sealed. The attention to detail and effort they put into making sure everything was sealed properly really shows.
I truly appreciate the quality of their work and their professionalism throughout the job. I would highly recommend Matt and John to anyone looking for insulation work done right.
About Great Northern Insulation
Great Northern Insulation (GNI) is a company that specializes in insulation services for homes. They offer spray foam insulation for crawl spaces and attic insulation replacement. GNI is known for their professional and efficient staff.
Clients have praised the team's expertise and willingness to explain the work process clearly. The company is also commended for their transparency and fairness in pricing, even when additional work is required due to unexpected issues, like a damaged vapor barrier.
GNI's commitment to quality is reflected in their thoroughness and dedication to providing the right solution for each client's needs. Clients report noticeable improvements in energy efficiency after GNI's insulation work.
Reviews
Aaron provided us with a prompt quote; Gracie & Harpeet were very professional and courteous. This is our 3rd property we've used GNI for our upgrade needs and would definitely recommend.
Sameer and Satyam come to my house for attic insulation and they Prep the floor and then they put the baffles in the attic. After that,they took before and after pictures. Lastly, they did a great job, leave my house clean. Would recommend them.
Photos
Hours
Monday 7:30AM - 5PM
Tuesday 7:30AM - 5PM
Wednesday 7:30AM - 5PM
Thursday 7:30AM - 5PM
Friday 7:30AM - 5PM
Saturday Closed
Sunday Closed
Location
103 North Port Road, Port Perry, ON L9L 1B2
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