A drone is being used to clean the facade of the Château de Sully-sur-Loire. Lichens and mold are eliminated using a hexacopter which sprays products on the wall.
Entrepreneur Didier Dardeau notably cleaned the Porte de Versailles sports center in Paris. The Loiret department, owner of the castle, has just launched a call for tenders to find the right service provider and Didier's company will of course be a candidate.