The greenteQ Foils are suited for the internal airtight window connection or the external protection against driving rain. These foils are stretchable. Additionally there is a various foil which can be used for the internal and external window connection. This foil is not stretchable. The greenteQ Foils have a good weather resistance, are paintable and can be plastered. They are suitable for new developments and redevelopments. All foils have a self adhesive strip for the assembly on the window frame. For adhesion of the foils the corresponding foil adhesive has to be used.