To add to this - in my experience any redstone signal will break any type of door (all types of wood and iron doors). Once a door has been broken a door can NEVER be placed in that same spot again (or at least not through any means I've found.
Lite Brite
To add to this - in my experience any redstone signal will break any type of door (all types of wood and iron doors). Once a door has been broken a door can NEVER be placed in that same spot again (or at least not through any means I've found.