Wehrhahn - Design and manufacture of production plants for the building material industry: Autoclaved Aerated Concrete (AAC) - a light weight champion, suitable for all types of wall construction, produced as blocks or panels. Easy handling, precise dimensions, excellent thermal properties. Fibre cement - autoclaving or aircuring technology, flat and corrugated sheets for internal and external use, suitable for all types of buildings. Quicklime - hard burnt lime for the AAC industry or soft burnt lime. Dry mortar - a well- mixed blend of various raw materials used for many kinds of construction material. Over 200 plants for the production of AAC blocks and panels, fibre cement, lime plants and numerous other special designs are in use across all climate zones throughout the world. This makes Wehrhahn global leader.