The roof panels are 4x8 sheets of ply that come with a radiant barrier laminated on. These are available at home depot and reflect the radiant heat from the metal roofing I planned to use. On the floor, I glued some FRP (fiberglass reinforced plastic) available in a 4x8 sheet at HD. This seemed stronger and more durable than linoleum or vinyl flooring material. Easy to hose out when necessary.
