Method for preventing and combating fungus attack in existing building structures and electrodes for carrying out the method

A method for preventing and combating attack by fungus and other harmful living organisms in existing building structures contained in an existing building, comprising:

• arranging a high frequency (HF) generator adjacent to the attacked area of the building structure, which building structure remains in place in the existing building;
• connecting a number of electrodes to the HF generator through HF supply lines;
• adapting and activating the HF-generator to supply a sufficiently strong HF-power (kW) which is dissipated in the treated area of the building structure, thereby heating the attacked area by means of electromagnetic energy to a temperature lethal to living organisms;
• and maintaining the high temperature for a predetermined period of time,
• characterized in that the electrodes are plate electrodes arranged on both sides of the attacked area of the building structure or part thereof in such a manner that the electrodes in combination form at least one capacitator, whereby at least part of the attacked area of the building structure constitutes the dielectric of the said at least one capacitor, using at least one frequency within a range of from 3 to 20 MHz, and thus heating the area to approximately 50.degree. C. for at least one minute.