Patina is a range of strong, autoclaved cladding sheets characterised by its subtle, matt finish. The sheets are through coloured In 11 attractive, muted natural colours. During the production process, Patina receives a unique impregnation treatment which protects throughout the sheet. Being impregnated, Patina sheets are effectively protected against water staining and dirt, ensuring that the facade retains its attractive appearance in both dry and wet weather conditions . The combination of colour stability with a class 0 fi re rating to BS 476 part 6 and a class 1 rating to BS 476 part 7 makes Patina ideal for overcladding rainscreen applications.