The engineering office Metallbüro Holz GmbH is a specialist in the sustainable, permanent and ecological renovation of flat roofs. Decades of experience in the field of roof waterproofing and roofing lead to a comprehensive knowledge of the problems of old and new flat roofs. In addition to the expert assessment of existing flat roofs, the area of responsibility also includes the development of renovation concepts, taking into account ecological criteria and the durable, safe and economical design of flat roof constructions in old and new buildings. The integration of renewable energy generation is a natural part of the planning.