I have worked with Mike Dandar 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 attention 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 Brookings / Sioux Falls SD. area.Brian Bossuyt, Extreme Panel Technologies