From the moment my husband and I contacted GNI for a spray foam quote, we received excellent customer service and very speedy responses. We had a few different companies come to our house for a quote, but GNI quickly became our first choice. They had the most competitive price for the work that was to be done and John (who came to do the quote) was very friendly and professional. The work was done in a very timely manner, (we had our basement spray foamed) and our house has significantly felt warmer since...our furnace also does not turn on nearly as much. We just had the work done last week, but I know we will be saving on our heating bill! Thanks so much for doing such a wonderful job! read more

I had the Garage Ceiling (under bedrooms) and basement spray foam'd. Matt who came out to do the estimate was great to deal with, he also suggested some items missed by other quotes which was great. I also had to deal with some scheduling challenges and move the install date based on some re-scheduling of other work, the scheduling team did a great job of moving my install to meet my needs. I would recommend and it was for a good price compared to other quotes. There were some minor spots that didnt get filled as expected due to challenges with the existing house (tight angles/small holes), but overall coverage was great and there wasnt a large mess or any issues when I came home. read more

I had an issue on my part regarding confusion with what was going to be insulated in our quote once the truck arrived so I contacted the office. The staff went went above and beyond our expectations. They came back out to go over an unusual crawl space area, provided us with a new quote explaining the proces they needed to do with to my husband and came back within a week to do the work. We are extremely satisfied with their professionalism.The care the crew took to navigate the shortest route to the two areas (attic & crawlspace) and the timely manner in which all was completed was greatly appreciated. I would definitely recommend this company! read more

so the old house was assessed and had no insulation anywhere to be found. so great northern came in and blanket wrapped my crawl space, blew in my attic and also did a complete drill and fill of all the house walls. first Chris showed up, checked over everything, measured ect a crew came and insulated the crawl space, then a few days later , Bob, Brennan and Vanessa showed up and filled the attic and walls. They were vary good, answered all my questions, respected my property, and even moved hoses ect, not to damage the flower beds Great company, good communication, thanks for the good service Jamie Belleville, Ont read more

From the moment we reached out for a quote, to when we paid our invoice we've had zero complaints or issues with this company. We had several companies come to quote our entire (gutted) property, and the prices were very comparable - we selected Great Northern for their one on one support and expertise on how to tackle our job - there was a lot of back and forth (our questions), and they were welcomed and never seemed a bother. The job itself was quick, clean and professional. Our house is a beautiful shade of purple! We would/will use them again on our next project! read more

These guys are absolutely fantastic. Can't recommend them enough. Punctual, efficient, knowledgeable, and they get the job done and done right the first time. We had both spray and blown in insulation done. From Alana who did our quote, to Tom and Brian J (out of their Barrie shop), the entire experience has been flawless. With spray foam, I wanted to ensure I dealt with a long standing, reputable company who PROPERLY has their guys trained on the installation. Anything less than that can be problematic. The crew was great and left my home like their found it. Thx guys! read more

Great Northern Insulation Great Northern Insulation did a big attic project that took 3 days and we are very happy with the end results. Ross, Dave H, Aaron, Marv, Shawn and Phil were polite and very informative as I had many questions and they had answers every time. When they finished they made sure I was happy with the work before taking off. I'd would recommend them to friends and family and call them back for future projects. Thank you everyone and a big thank you to Matt in sales for helping us find the solutions to our attic problems. read more

These guys are the best! From Dave who checks out the job and does the estimate to Nick in the office to Dan and Matt who get the job done fast and efficiently. Every staff member is friendly, informative and do excellent work! I would highly recommend Great Northern Insulation for any size job. They have insulated my entire basement making a huge difference in heating and air conditioning costs and they have just completed a small job insulating my walkout! Awesome!!!! Thanks guys we totally appreciate your work! read more

Very pleased with the service from GNI from start to finish. A quote was arranged very quickly with a thorough explanation of the scope of work required. Appointment was made with a convenient time with the crew showing up as scheduled and on time. The crew, Bob and Brennan were extremely nice, efficient, explained everything they completed and cleaned up as if they were never here. I would highly recommend GNI and will use them in the future. read more

Had attic insulation done, went from R12 to R60! I can already see the difference with these last few hot days. Great job Derek and Craig. I then had a bedroom above the garage sprayed with the foam! Awesome job and process. I'm extremely happy with how both jobs went. I want to say Chris and Richard ? Did the foam. They went above and beyond to make this guy happy. Steve M read more

Hello - The Great Northern team (Jamey & Brady) came on time as requested in the morning The attic spacing was very low and the team managed to complete the work in quick and efficient manner. Both took steps to ensuring our home was tidy upon exit. I found their pricing to be competitive given the area which needed to be covered in a challenging environment. read more

Good day my experience with Great Northern Insulation started with MATT REESOR who inspected the attic with me & we discussed what was to be done , a time was set & the installation crew arrived on time ,a friendly crew & we discussed what to be done & the job was done to my satisfaction . thank you for a job well done CLINTON SMITH [ invoice # 776895 ] read more

Was very happy with the GNI team. Matt was good and listened to my needs for my house, and built the quote to my needs making the necessary changes before the install. the installers, Pete and Jake were thorough and made helpful suggestions, they were efficient, protected my home and cleaned as they worked. would definitely recommend these guys too any one. read more

We are quite happy with the spray foam insulation we had done in our basement. The young brothers who did the work were very professional. They were quick, efficient and did an excellent job cleaning up. We opened windows and used fans and by mid afternoon there was no smell residue whatsoever. We would definitely recommend this company. read more

We had foam insulation applied in our cubby hole in the basement on Dec. 28th. The installers were very professional, friendly and informative. No mess left in the house Great Guys Then on Dec. 31 we had Henry & Hunter install foam insulation in the attic. Again, very professional young men. No mess left in the house. Great Guys. read more

Pros: Job was done well, on budget. Cons: Installers tracked insulation through my home despite using upstairs window to run hose through. They also did not reinstall my window screen properly. Overall, for the price, I was happy. Disappointed I had to take a day off of work to have work done though. Weekend installs would be better. read more

I had the attic of my story and a half home in Woodstock spray insulated to R31. Matt the salesman was very knowledgeable and a pleasure to work. I was not there when they came to spray but they did a great job and cleaned up very well after themselves. I would recommend and it was for a good price compared to a competitor i priced. read more

Had Great Northern Insulation come and spray foam in our 20 x 20 garden shed. They showed up on time, covered everything in plastic that could not be removed to protect from overspray and even the cement floor. They finished on time and did a good job. I would not hesitate to recommend to family and friends. Great Job. read more

Wish I had Great Northern Insulation come in years ago. Thought the price was going to be crazy, that is what stopped me. In fact, the cost was very reasonable. The guy's that come out were professional and polite. Very happy with thier work! read more