About Wienerberger Wienerberger group is the World's largest producer of clay (terracotta) building bricks and Nr. 1 in the clay roof market in Europe. The group also holds leading positions in pavers in Europe. With over 204 factories across 30 countries, Wienerberger has become the foremost authority when it comes to natural, sustainable, green building material solution provider. In 2006, the company was incorporated in India with its very first Asian plant in Kunigal, near Bangalore, to produce high quality clay building materials for the local market.