All reviews (931)

Guys showed up and went right to work . Evident that they knew what they were doing. Protected floors and carpets on way in and out , were friendly, accommodating and cleaned up after they were done, not to mention I noticed difference walking upstairs the same day. Great job and highly recommend. Thanks !! Des Chin Sang

Incredible customer service. Fast, efficient and friendly every step of the way. From our first email to the completed job, we were kept apprised the entire time. Thank you for appreciating us as a customer!! I would not hesitate, and have already recommended your company to others. I wish you continued success.

The company won our bid with competitive pricing and scheduled the job fairly quickly. With all the home renovation delays it was refreshing to have the work done within just over a month of the initial quote. On the day the team was quick and clean. they updated me on what they were doing and kept to themselves. Thanks GNI!

Great Northern Insulation did a great job insulating my attic. They took care not to cause a mess and the project was completed quickly.

GNI showed up on time and did a great job insulating our house. In particular they went the extra mile spraying the headers in the attic which were a big source of heat loss. I highly recommend them!

Had our attic insulated, we have dropped the temperature on our thermostat and are toasty warm. I will recommend Great Northern to anyone who asks. Thank for the great job and the friendly and knowledgeable crew.

Job well done, clean, on time, competitive rate. Fulfilled contract to a T Could not have hired any better. I would recommend.

Awesome crew, here before scheduled time, done before scheduled time, very professional, very clean while working, very knowledgeable! Highly recommend

Our attic insulation upgrade was completed as per their estimate. They arrived a week earlier due to a last minute cancellation. Work was completed as advised, within a few hours. They left our house after cleaning up all residual materials, drop sheets were utilized and used properly. We are very satisfied with the work.

Ryan and his crew did a very good job at installing batt insulation and vapor barrier throughout the house. Thoroughly cleaned up before leaving site. Great customer service as well, always letting me know proactively what was going on and what the plan was.