Wooden planks are items used to fortify doors and windows alongside nails. Planks can not be recovered when a barrier is torn down so use them sparingly. As of version 0.1.4a, doors broken down either by the player or by zombies will yield two planks. Planks of wood are also able to be used as melee weapons. Planks are also used in carpentry for building walls, storage crates, floor tiles and staircases. They are obtained from chopping trees down.