BARN DOORS are not necessarily for barns anymore. In recent years the the term "Barn Doors" is synonyms with double doors that open fully or even more recently for doors on a track that is attached to a wall (not in the wall). Conversely pocket doors were the old standard, they could be single or double but slid into the wall. Barn doors do not require cutting into the wall and can be applied almost anywhere where there is enough room. The track is the main thing that makes these types of doors "Barn Doors". The track is at the top of the door and the door or doors hang with wheels. There are different styles of tracks to pick from. The doors can be just about any style you want. It is not the doors that make it a barn door as much as it is the configuration of the track with hanging wheels on doors.