An exterior door is a large hinged or sliding barrier made of usually wood and glass. The purpose of the exterior door is to allow or disallow access the building. The exterior door can be found on the outside of a building.
Interior Door
An interior door is a large hinged or sliding barrier made of usually wood. The purpose of the interior door is to allow or disallow access to different rooms inside the building. The interior doors can be usually found in the entrance of rooms.