A method for completing a project includes several steps. The apparatus includes a sensor configured to detect a signal produced by a eddy current generated electromagnetic field. A height-adjustable, downwardly foldable ironing board is secured to two of the grooved vertical posts. In a third method step, the at least one pressure mat is then acted upon by a pressure medium in order to press the same against the reinforcement element and the fixing frame. The element includes: a first heating resistor for measuring a flow rate; a second heating resistor for heating a support for the first heating resistor; and current control circuits and which control heating resistor supply current so that the temperature of the second heating resistor is higher than the temperature of the first heating resistor.