Method and tool for fitting an insulating board to a substructure

摘要

The method involves permanently holding a covering disk (22) on tension at a retaining plate (4) of a plate dowel during pushing of the plate dowel into an insulation material till to reaching of a penetration depth corresponding to thickness of the disk, where the disk is turned towards an insulation plate (3). A sink hole (25) formed in front of the retaining plate is sealed outwardly by the disk that is pressed at an outer edge area of the retaining plate. An insulated hollow chamber (24) is formed between the retaining plate and the sealed disk staying in the sink hole. Independent claims are also included for the following: (1) a tool comprising a screw bit for mounting an insulation plate at a substructure (2) a covering disk for closing a sink hole.