Roof gutters and drain pipes aren't conspicuous, but every building needs them. The Rheinzink company in the city of Datteln is the world's market leader in roof and drainage systems made of zinc. Rheinzink also makes whole facades from zinc - and sometimes they are used by top architects.For example, Rheinzink facades adorn the Jewish Museum in Berlin and the Riverside Museum in Glasgow.
A report by Anja Kimmig.
