Understanding and Predicting Localised Variations in the Degradation Rate of Architectural, Organically Coated, Steel Cladding

Organically coated architectural steel provides an economic, visually attractive, innovation friendly and robust building cladding. However, its performance, usually calculated using accelerated weathering ‘artificial’ outdoor testing, can be compromised within specific areas of the envelope. The exact reasons for this are not fully understood. In attempt to discern where why performance varies, investigation is carried out into some possible discrepancy, it concluded that a combination high humidity build-up aggressive natural deposits contribute degradation rates in sheltered regions, such as eaves, microclimates created. their effect presented key accelerant during in-use service. A numerical simulation approach developed predict washing, via rain impact characteristics analysed. This shows promise determining unlikely naturally washed, therefore subjected accelerating, deposits. It shown could used optimize design process promote washing well provide area-of-concern map which exposed cut edge should avoided any manual inspection concentrated. also nearby buildings sheltering effects leading decreased increased deposit ultimately failure.