We’ve recently topped up our attic insulation. The service level that GNI provided us was nothing but exceptional. Starting with Matt providing the recommendation and estimates, to Nick and Sarah’s prompt reply to all my questions. On the day of the insulation, Connor, John and Will carried themselves with professionalism, friendliness and efficiency These three gentlemen even took the time to inform us what to look out for in the attic and how we can maintain it. One rarely finds such a level of service and competency these days, and GNI reminded us what a high standard service level is about. We will look no further than GNI for our next insulation needs. Thank you GNI!

The estimator was efficient and fully explained what was needed to meet various rebate program requirements. The employees were prompt and showed up on time. The day was getting hot and they continued to work at this job without interruption until completion. Thanks for a job well done!

We had our attic insulated this morning. We are very pleased with the amount that was blown in.

Your employees Brendan & Tiffany were very professional and polite.

We went through the Greesaver program.

Gord Breese
52 Western Ave
Guelph On N1H 6A8
519-821-4440

The workers were courteous and cleaned up after installation. We appreciated their professionalism and the fact that they did not hesitate to answer questions. We would use Great Northern Insulation again.

After a couple of years of having mice and insects come into the basement and the home inspector telling me I needed more insulation in the attic, I reached out to a couple of insulation companies and these guys came highly recommended by the energy rebate technician. I had them come in to increase the blown in insulation in the attic and re-insulate the basement after all the old insulation was removed.

I'm happy with the attic even though there was a mess left over in the bedroom I had to clean up after they left.

The basement is another story. During the spray foam install, I complained that they were missing areas and I had them redo certain spots. As some materials were wet, I couldn't do a proper quality control inspection and as a home owner, I shouldn't have to inspect a professional companies work while they are on site. Once the job was done, I did look further into it and was not impressed with what I found and the repairs I had to do. A picture is worth a thousand words.

I contacted them, one of the managers came over to investigate and told me he was going to bring it up higher. Well weeks later, still no word and no discussions on how this can be fixed.

I'm sorry but their promise to exceed my expectation fell way short of the goal line.
There is insulation on the walls, I will give them that.

The Moe crew were very polite and thoughtful. They worked quickly and efficiently. They cleaned up so "that we would not know they had been here". Moe reviewed everything they had done as per the quote with me and asked if I had any questions. We were very pleased with their work. They were also respectful about Covid protocols. Many thanks

Company referred to me by a realtor.
Smooth booking process and very organized.
Service professionals at the house were prompt, friendly and knowledgable and efficient.
Thanks to Gabe and Chris for a great experience.

I wasn't told they had sealed up every vent in my attic thus enabling my roof shingles to bake. I've had to replace the roof shingles. Roofers and building inspectors were shocked that GNI had completely sealed my attic. GNI says its what they call "Hot Attic". They refused to refund any portion of the $14,000 I paid for the insulation so I could put it towards the new roof shingles. BEWARE, they don't tell you your attic will be completely sealed and you need air flow or else be prepared to replace your roof shingles every few years. GNI took no responsibility at all. They've taken advantage of a senior woman to line their pockets. Do your research and ask your local building department about completely sealing off a roof before you purchase spray foam from GNI. Lesson learned - STAY AWAY FROM GREAT NORTHERN INSULATION!!!

I have recommended this company many times and they are very good.
Promo and excellent clean up.
I will highly recommend them over and again when needed.

Great work every time.

From quote to installation, the customer service was a 10+. During installation, both crews on both days were great. Friendly, helpful, and informative. Fabulous job and I'm so excited to save on heating costs and finally have a warm house.