I saw one built that the guy made the walls, put insulation in then a layer of Luan over the insulation. then set the walls on the base screwed them down, then screwed the wall sections together at the corners and added his roof of flat 3/4 inch plywood, and covered with metal. screwed straight to the side walls.
The back was lower than the front, so you build the front and back walls 1/2 foot different, and then the side walls to meet the angles of the front and back., it was made for New Englands weather.
The back was lower than the front, so you build the front and back walls 1/2 foot different, and then the side walls to meet the angles of the front and back., it was made for New Englands weather.