... 6 times 3 easy shipping and quick installation flat roof prefab house portable homes for sale Product ... and sandwich panels for the walls and roof.The wall/roof panel can be polystyrene, polyurethane, rock ... bellow: Item namesteel structure houseSizeLength , width, roof height and eave heightRoof and WallPU,EPS,Rock ... 40 GP, 40 OTAppearance and internal flat roof prefab house portable homes for sale