I had a dealer to erect mine, I had my Contractor to pour a 5" Slab with #3 Rebar 16" OC and it still looks great. I had him to dig 8X16" footings just in case at some point in the future I wanted to have Wood or Masonary Walls. Mine is 40' deep and 14' wide, I wished I had listened to my wife when she suggested a 16' wide to allow my slides to fully extend and make walking around/maintance, etc easier, but... I had the ribs in the metal roof turned to allow the snow to slide off and I also did three walls for protection. Instead of a Rolling or Overhead type of Door, I opted to put a Fabric Solar Screen for my large Door. Overall I have been pleased. JH