Cladding is the application of one material over another to provide a skin or layer intended to control the infiltration of weather elements, or for aesthetic purposes. Cladding does not necessarily have to provide a waterproof 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 applied to windows is often referred to as window capping and is a very specialized field.
This is a protective layer of materials that separates a building’s structure and interior from exterior elements, such as weather and sound. The exterior cladding is often not one material but an assembly of materials, and each material has its own importance in blocking exterior conditions. For example, a contemporary house will have an exterior veneer of siding or brick, a moisture resistant plastic wrap, insulation and a vapour barrier to protect the interior. Vice Versa.