All activities in the field of windows, doors, PVC doors and similar, in particular installation, renovation, restoration, delivery and repair. May establish branches and subsidiaries in Switzerland and abroad, participate in other companies in Switzerland and abroad, and conduct all business that is directly or indirectly related to its purpose, as well as acquire, encumber, sell and manage real estate in Switzerland and abroad, also arrange financing for its own account or for the account of third parties and provide securities for liabilities of affiliated companies.