Sales, trade, assembly and service of windows, front doors and facades for new buildings and renovations. Sales are primarily made through dealers or directly to end customers. The products include all basic materials, in particular wood, plastic and aluminum, as well as their sensible combination. All existing technologies and new developments in the field of windows, doors and facades are and will be included in the product range. This particularly concerns environmental and climate technology as mechanical elements as well as manual and automated control technology. In addition, all technologies for thermal and radiation insulation, solar technology, regenerative energy technology, residential ventilation and heat recovery are included. The company also aims to offer all sensible accessories and components of window, door and facade technology. The products meet or exceed the usual national and European standards. The company can develop and produce products, components and systems for window, front door and facade technology. It can participate in or acquire other companies, found, acquire, lease, finance or merge with them; in general, it can conduct all business that is related to the purpose of the company or appears to be in its interest. The company can establish branches and subsidiaries at home and abroad and participate in other companies at home and abroad, acquire, encumber, sell and manage real estate at home and abroad, arrange financing for its own or third-party account, and provide guarantees and sureties for subsidiaries and third parties.