Doorway

Doorways are passable barrier structures that separate the inside of a building from the outside space. There are three types of doors: wooden door, reinforced door and the mighty door. Each door is stronger and more resource-expensive than the last. The wooden door costs 4 wood; the reinforced door costs 4 wood and 2 metal; and the mighty door costs 4 wood, 4 cut stone and 4 metal.