Abstract: A CNC-controlled roll-forming method comprising manufacturing at least one individual building component for subsequent, typically ex post facto building of a structure by connection of the individual building component with additional building components, using a roll-forming machine which has a controller configured to read machine-readable CNC instructions, and/or using the roll-forming machine for adding at least one marking to the individual building component, e.g. during manufacture of said individual building component, wherein said marking facilitates subsequent connection, of the building component, to at least one additional building component.