Planning, construction and renovation of flat roofs as well as provision of additional flat roof services, installation, renovation and repair of heating systems, provision of all services in the main and ancillary construction industry, delivery and installation of reinforcements and formwork in buildings and scaffolding, as well as provision of all related services. May establish branches in Switzerland and abroad, participate in other companies in Switzerland and abroad, acquire or merge with similar or related companies, acquire, manage and sell properties, and enter into all transactions and conclude contracts that are suitable to promote the purpose of the company or are directly or indirectly related to it.