The core activity of Müller Fenster und Türen AG consists of the manufacture, delivery and installation of windows, doors and flooring, as well as the execution of renovations and surface treatments. Specifically, this includes: the manufacture and installation of plastic windows, aluminum window shutters and doors; the delivery and installation of entrance doors, fire doors, room doors and apartment closure doors; the laying of vinyl, laminate and parquet floors; and the execution of renovations and surface treatments, including the painting of wood surfaces.