Cladding is an outer layer of material covering another. It may refer to the following:

Cladding (boiler), the layer of insulation and outer wrapping around a boiler shell
Cladding (construction), materials applied to the exterior of buildings
Copper cladding, applying copper to the exterior of buildings
Rainscreen cladding, an exterior wall detail to create a capillary break and to allow drainage and evaporation of water
Siding, or wall cladding, exterior material applied to the walls of a building
Cladding (fiber optics), fiber optics property to contain light in the core of the fiber by total internal reflection
Cladding (metalworking), a bonding together of dissimilar metals
Cladding (nuclear fuel), the outer layer of the fuel rods, standing between the coolant and the nuclear fuel