Plain Copper

Flat copper sheets and strip used for building purposes are made  of phosphor-dioxidised copper in various tempers, annealed, half hard or hard. The majority of copper roofing is undertaken in the long strip method using half hard temper. 

As new copper weathers due to exposure, the original red tone changes to dark brown. This characteristic change of copper is dependent on the climate and airborne sulphur compounds at the particular location. Normally copper turns to an increasingly dark brown colour during the first years, and thereafter to the green shade - the well known light green patina that is so typical of copper.

Properly installed copper roof of 0,6 mm thickness will under normal circumstances last several hundred years. The material properties correspond EN1172 requirements. The sizes for roofing purposes are typically from 0,5 mm to 1,00 thick material, but for wall cladding up to 1,5 - 2,0 mm or even thicker depending on design and production process.