The Barred Door is a door obtainable in Vethea.
Barred Doors serve as a Vethean replacement for doors. Previously, normal Wooden Doors were obtainble in Vethea but as of version 1.4.0 the Barred Door replaces these.
Barred Doors break faster using a pickaxe and do not drop, even if broken with a pickaxe or if the block under them is broken. Barred Doors are stackable, unlike Wooden Doors which are unstackable in Minecraft 1.7.10 (they are stackable in Minecraft 1.8+).
In every other way Barred Doors are functionally identical to Wooden Doors.