Wienerberger is part of the international (listed) Wienerberger Group, the world’s largest producer of bricks and the number one in Europe what clay roof tiles are concerned. The company was founded in Vienna (Austria) in 1819. Over the past decade the group has developed into an international player in construction materials. Currently, the Wienerberger group counts 203 production sites in 30 countries and employs 15,813 people, with a consolidated turnover of 3 billion €. The Clay Building Materials Europe represents 1.64 billion € and employs 10.219 persons. The production includes elements of: Façade: facing bricks, brick slips and ceramic cladding systems; Wall: innerwall blocks (clay) and glue system blocks; Roof: clay roof tiles, technical accessories and underlay; Pavers: clay pavers for house and garden as well as pavement. Major brands are amongst others POROTHERM (wall), TERCA (façade and pavers), DESIMPEL (façade) and KORAMIC (Roof, accessories and cladding systems. In ETN SULTAN Wienerberger provides its expertise in WP3, cf. the development of mineral residue valorisation strategies for tailings and tailing residues (after pre-treatment).