The engineering firm 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 covering have led to comprehensive knowledge of the challenges associated with both old and new flat roofs. In addition to the expert assessment of existing flat roofs, the scope of work includes the development of renovation concepts that take ecological criteria into account, as well as the permanent, secure, and economical design of flat roof constructions for both existing and new buildings. The integration of renewable energy generation is an integral part of the planning process.