Execution of works in the fields of sheet metal work, lightning protection, flat roofs, roofing and building maintenance, trade in building materials as well as operation of mechanical facilities for maintenance/repair work and wood processing, as well as all activities directly or indirectly related thereto; may establish branches and subsidiaries, participate in other companies, acquire or establish similar or related companies, acquire, encumber, manage and sell its own and/or third-party assets, in particular real estate, intellectual property rights and securities, provide financing for its own or third-party account, and grant guarantees and warranties for subsidiaries and third parties.