* Activate a plank, right-click the wall, and select "Repair" or "Improve".
* The effective [[quality]] of the plank is affected by its [[damage]] and the [[player]]'s [[carpentry]] skill.
* Any quality plank can be used to repair and improve a wall (which will improve by between around .04-1.5+ QL per plank--more research needed but a higher QL plank will yield more improved QL).
* 1 plank of any QL will only repair 10 damage.