Design of over-cladding systems to existing buildings

Over-cladding concerns the addition of a new facade comprising an independent sub-frame and new cladding which is attached to the original facade. This paper describes the use of light steel construction in this application, and addresses the design criteria for over-cladding systems. A series of brief case studies from Denmark, Finland and the UK are presented. Results from the monitoring of a prototype over-cladding panel are reviewed which confirms the good thermal insulation and durability of composite panels and galvanised steel sub-frames in an exposed situation.