Our Manor Hardwood doors have a 70mm thick framework with traditional mortice and tenon joints which are glued and screwed for added strength. On Manor hardwood style doors we use wider board which is set into the framework with a raised detailed board on the face, again all boards are glued and screwed to the framework. On hardwood doors all screw holes are filled with hardwood pellets then sanded smooth ready for treatment. Hardwood doors are supplied untreated.