STEF in ??????????

From initial estimate to the end of the job, I knew I was in good hands with GNI. Mike from the Port Perry office answered all of my questions during the estimate and made me feel I chose the right company to do the job. The crew that showed up both days in December, one day for spray foam and another day for the attic, were extremely professional and very respectful to my home. They left no trace that they were even there. The savings on my bills are extraordinary and worth every penny I paid. I have recommended GNI to three other people and two have since completed the work and are extremely satisfied. The third is booking for a later date, and I'm sure they will be pleased as well. You cannot go wrong with GNI.