Introduced in 1880, the double-troughed clay brick quickly spread throughout Germany. More than 100 years ago, countless apartment buildings in Berlin were covered with Z2 interlocking bricks, and even today millions of "Berlin bricks" protect the citizens of the capital from wind and weather. With its proven shape, high stability and precise fit, you can cover roofs that are consistently up-to-date not only today, but also in the future.