Method, device and semi-finished product for producing prepared roofing for renewing rooves

Abstract

The invention relates to a method for producing prepared roofing for renewing rooves, comprising a glass-nonwoven based planar structure (1) containing cavities (2, 3, 4, 5, 6, 7) spaced at intervals, which is laminated with a bitumen-based planar structure (10), a plastic film (8) being interposed between said structures. Said method is characterised in that the plastic film (8) is applied in a first step to a glass-nonwoven based planar structure (1) that has a mineral coating on one flat surface, by the application of molten plastic during an extrusion coating process to the opposite flat surface from the surface with the mineral coating. In a subsequent step, the bitumen-based planar structure (10) is laminated onto the surface of the glass-nonwoven based planar structure (1) that faces towards the applied plastic film (8). This permits a cost-effective production. The invention also relates to appropriate embodiments of the method, to a device for carrying out the method and to a semi-finished product for producing the prepared roofing for renewing rooves.

Dependencies are inferred from the claim text.