# Activate a [[trowel]], right-click the wall plan, and select your desired wall type.
# With the trowel activated, right-click the wall plan, and select ''Continue building'' until the [[wall]], [[window]], or [[sturdy door]] is finished.
* You have need to have at least one stone brick and one 2kgs of mortar in your inventory to start a wall or continue building it. A wall needs 20 actions to finish, each action consuming one mortar and one stone brickand 2kgs of mortar.
* '''The stone brick and mortar will be consumed shortly after you start the action, do not move while building or the action is aborted and the resources are lost'''.
* A building plan with no walls will decay in a few days, make sure you start at least one wall.