Wooden Walls are structures that a character can build to fortify a structure or create obstacles against zombies.
Ingame image of wooden walls at Build 36.40 - From Wooden Frame to Level 3 Wall
Wooden Walls are a defensive structure that can be built to seal entranceways, reinforce entry/exit points, and can be used in the creation of completely new structures.
All wooden walls and wooden windows require a player to have a hammer, planks, and nails to construct. The strength of the wall itself is dependant on the level of the actual wall.
Walls over time can be destroyed by zombies, however if painted, at this current version, will be ignored by zombies who will concentrate on barricaded windows and doors to enter a building. While a slight oversight, you must be holding the planks and nails in your inventory to upgrade a wooden frame to a wall, and these construction parts can not be used if on the floor.
Right clicking on the wooden frame shows the upgrade menu.
To build a wooden wall, a player must first equip the hammer, build a wooden frame, and then upgrade this frame with further wood and nails.
To construct a Wooden Frame, a player would require for Level 1, 2 skill points in carpentry. For Level 2 it requires 4 carpentry skill, and the Level 3 wall requires 7 Carpentry skill.