I have worked with Curt DeGree for a number of years and He has a long string of happy cutomers. He does high quality work in a timely matter at a reasonable price. His attension to the details are outstanding. He is very knowledgeable of energy efficient buildings including the use of structural insulated panels. I consider him my go to guy in the Bismarck/Mandan area.Brian BossuytExtreme Panel Technologies