Recent review: “These people work as a polite, cohesive team. Estimates list work to be done and are followed up on in a timely manner . Workers are neat and don't leave any mess behind. They will be performing another job for me in the near future. I would...” more

Recent review: “We purchased a newly renovated home and needed insulation. Jason, the general manager of the company was prompt and courteous. He answered all our questions and provided an excellent price. The business is family owned and operated. His staff...” more

Recent review: “Joe was incredibily communicative, and bent over backwards to get the job done given my tight deadline. The job was quite small, but he still put in the extra effort despite having a challenging day. Thanks to his efforts, I may actually get the...” more

Recent review: “I purchased an old house (built in 1945) that had very little insulation in the attic and none in the basement. I was fortunate to qualify for the energy audit under the full program so a year after I moved in I had arranged for Great Northern...” more

Recent review: “neat, efficient, courteous,clean - - highly recommend - we checked their references and two other customers in Waterdown were extremely pleased.They arrived on time, put the drop sheets throughout the halls and stairs and did a good job.” more

Recent review: “very helpful, answered all the questions, were in and out in no time, had the whole basement insulated in less than a couple of hours , left the basement nice and clean, will use them again” more

Recent review: “It was an absolute pleasure to deal with family business. From start to finish i felt comfortable. Your price was realistic. Your delivery were on time, the product and installation top notch. Please thank Martin, Michael and Peter for their...” more

Recent review: “Moving into my house, I discovered the attic only had about R20 insulation in the attic. Since that is where most of your heat loss is, I decided to get quotes to add insulation to R50. Great Northen submitted a quote and given their price and the...” more

Recent review: “Company was called in for an estimate, gentleman came, checked artic and left Printed Esitimate, compare to few others. Few weeks later when they were given go ahead, appointment was made and arrived on time. Very Friendly, Pleasant and Courteous...” more

Recent review: “Dave came to the house to survey & estimate the job,very pleasant & non pressuring person. With his imaging device he surveyed the house for cold spots & advised what to do.Add insualtion to attic, replace a couple of windows & foam all basement...” more