Cladding
Cladding is a layer of material applied to the outside of a building or structure to control the infiltration of weather elements, or for aesthetic purposes. Cladding does not necessarily have to provide a water-proof condition but is instead a control element. This control element may only serve to safely direct water or wind in order to control run-off and prevent infiltration into the building structure.
Cladding is often considered to be a building envelope sub-component for the purposes of valuing and inclusion in an asset register.