Wienerberger

Founded in 1819, Wienerberger AG is a producer and a major manufacturer of clay roof tiles and concrete pavers in Europe. The company markets its products under three brands: TERCA (facing bricks and pavers), KORAMIC (clay roof tiles), and POROTHERM (solid bricks and brick ceilings). The company's subsidiary, General Shale Brick, serves the Southeastern and Midwestern United States.