The doors shown are tongue-and-groove cedar on the outside and rough-sawn cedar on the inside, per client's request. Both are insulated exterior doors, but could be uninsulated for indoor use. Shown is one door with removeable inset mirror and picture frame, and one Sauna door with vent and speakeasy-style view window. Doors are highly customizable. Options include surface, color, glass, etc. My doors are typically 2-1/8" thick, which is thicker than normal, but variations are possible. Contact win your specific idea and we can figure out a way to make it happen.