Repairing Blocks

Every block and piece of furniture has a durability level, some being stronger than others. When damaged, they can be repaired with the correct tool and correct item/s. Repairing is necessary to keep the player's base defendable. If the player chooses not to repair their base's walls or traps, the base will soon fall due to zombies constantly damaging it.

Appropriate Tools
There are only a handful of tools that can repair, some easier to obtain compared to others. These tools repair at different rate and can be compared here.
 * Stone Axe
 * Taza's Stone Axe
 * Claw Hammer
 * Nailgun