They done my job in three stages. Removal of old insulation, spray foam a layer, and then blown in up to R50. They were here when they said they would be and we got a call from the office after every process to make sure everything was ok and to schedule the next stage. Very happy with the job done and would recommend them to you. The guys on the job were Bob, Dakota, Jamie and Matt from the Port Perry Branch. Dave Chatterton came to the house went in the attic before hand and gave us the quote all good at what they do. Brian read more

We needed to have the insulation upgraded in our upper and lower attic spaces, since we have never had it done. Calling Great Northern Insulation was a pleasure from dealing with Alana Cooper to the 2 technicians Tom & Brian from the Barrie Branch they were all awesome. They showed up on time, kept me informed, did a great job & even cleaned up after the job was completed. I am very satisfied with the work provided and would call on Great Northern Insulation for any other jobs required, plus would have no problem recommanding them. read more

Great service and very satisfied with the work Great Northern Insulation did in our basement. The staff is friendly and knowledgeable. We had our full basement spray foamed from floor to ceiling. The guys showed up on time the day of, prepped the basement properly, spray foamed everything they were suppose to, cleaned up nicely once they were done. I will definitely use them again when we get our attic done in the next few months and would recommend this company to anyone who is considering spray foam insulation. read more

Salesperson was friendly and knowledgeable. He explained everything patiently and thoroughly and the quote was fair. We decided to get our attic and basement insulated. The installers arrived as scheduled and took the necessary precautions to protect the floors to ensure things were kept as clean and tidy as possible. The quality and completeness of their work was on point with appropriate check points with us through the day keeping us informed on progress. I would highly recommend them for any insulation needs. read more

I recently (April 3/17) had the rim joists of our basement insulated with spray foam insulation applied by Great Northern Insulation and am very pleased with the workmanship and results. Mike Chatterton provided me with a written quote and Nick did a pre-inspection of the site prior to the spraying. The 2 technicians (don't recall theirs names ) were very professional , covered the floor with plastic prior to spraying and cleaned up after completing job. I would highly recommend this company. read more

Just had our rim joists insulated with foam and a thermal barrier spray painted.. The spray foam installation and the prep work to keep our things clean was wonderful. The thermal paint job done by Brady, Matt and Scott was equally as well done with them doing the clean up...the quote and customer service and the accounts department did a great job...from the first phone call every appointment was kept and on time. Wonderful job....would definitely recommend Great North Insulation.... read more

I would like to say that your salesman Dave Chatterton was punctual, knowledgeable and considerate. It was a real pleasure talking business with someone who knows theirs. The two men who laid my insulation where punctual, helpful, friendly and pleasant to speak to. Let me add that Great Northern was quick to respond to my pricing query whereas some of the competition couldn't even be bothered responding. I appreciate the professional touch!. Thank you for a job well done. read more

Excellent experience! Jamey and Matt were awesome and even fixed the poor job the last insulators done before I bought my home, to make sure that they completed their job with the highest of quality. They were courteous and careful to make sure they didn't make a mess in the house and even cleaned up afterwards! Both were awesome fellas to have in my home! They also offered tips and suggestions to help further reduce heat loss! Thanks so much guys! read more

Professional, courteous, clean in and out 2 hour attic insulation job by Matt and sidekick. Left one star blank, meaning it's insulation (not my biz) and I have to speculate 20% worth that the job was done right. I'm confident it was though, and that started with a professional sales visit by the obviously very knowledgeable Mike Chatterton who provided the quote. read more

We were very impressed by the overall experience with GNI. From the initial contact and estimate, to the workmanship & quality, they did a great job with our project including the flexibility offered for scheduling. A great experience from start to finish! We would certainly use their service again and obviously recommend them to others. L&R Custom Woodwork inc. read more

after having the house assessed and no insulation, these guys came and loaded it up, wrapped the basement crawl space, blew in the attic and drill and filled the whole house, great work was done by Bob, Brennan and Vanessa. They were all vary nice and everything cleaned up thanks again for the good work and service, Jamie Vance Belleville, Ontario read more

Great company with excellent service. Very professional from the first email contact, to the quote and the installation process. Work performed was insulation in the attic area of a century home and the insulation has made a huge difference. Highly recommend this company and would definitely use them again for another project or another house. read more

Great Job and very professionally done. Arrived on time and explained all the steps they were going to take. Matt and his highly skilled crew completed the job in a timely manner with no mess afterwards. Very helpful and knowledgeable when it came to insulation products and procedures necessary for the work to be completed. Excellent Job! read more

These guys did a great job. Very courteous, took the time to explain the process, and did a great job cleaning up after. A shoutout to the crew of Bob, Brennan and Venessa. Well done. And to Eric who took the time to come up with a solution for our project and made several trips to our location to answer any questions or concerns we had. read more

Derek and Dave showed up on time, as-planned with all the right materials and a full understanding of the quote we had accepted the week before. They were careful and thoughtful about where to bring in the hoses and conscientiously put down cardboard and plastic to protect, well, everything. Great job guys! read more

We recently had our basement done, and after been out of the house for 24 hours, and then returning the next day, we came home to a job well done, the basement had been swept and no signs of a mess anywhere, would highly recommend this company to anyone thinking of having their home foam insulated. read more

They were excellent when accommodating our parking situation while they were working. They consulted us prior to setting up the equipment to make sure that they wouldn't impede anything going on in the house that day. They were very neat and professional. Terrific Job Derek and Sean! read more

Quote was fair. Sales person was knowledgable and didn't try to upsell us. Installers arrived on time, were fast and cleaned up completely when they were finished. Had us check to make sure all was in order before they left. Would recommend them. read more

We had Great Northern Insulation spray foam the garage ceiling and some of the shared interior walls. From the quote to the installation the process was quick and easy. The installers did a great job and didn't leave any mess behind, read more