1:Meterial:SPF-J(spruce) 2:Size:the dimension can be customized 3:Thickness of the wall:19mm or 36mm Prefab house, KD design. Size: the dimension can be customized. Material:Pine, Suffocating treatment,steam treament,30 years woodwarranty.Thickness of the all wall:36mm, or customized.Thickness of the floor board: 18mm.Thickness of the roof: 20mm, include the windows, doors, base timber, glass and ...