# Create a [[building plan]] for the future structure.
# [[Activate]] a [[mallet]], right-click the wall plan, and select the desired wall type.
# With the mallet still activated, right-click the wall plan, and select "Continue building" until the [[:Category:Walls|wall]], [[window]], or [[door]] is finished.
* The initial [[action]] consumes one large nails and one plank; each subsequent action consumes one plank from the player's [[inventory]].
* A building plan with no walls will decay in a few real-life days so make sure to start at least one wall.