VARIOUSLY CORRESPONDING DEFORMED CEILING BOARD

PURPOSE:To prevent the imparting of discomfort feeling due to the falling of water droplets condensed on a ceiling board onto the back, etc., of a person during bathing. CONSTITUTION:The ceiling board has pairs of aluminum plates 8, 9 composed of a waterproof material and honeycomb structure materials 10 interposed among a pair of the aluminum plates 8 and 9, notches are formed to one of the pair of the plate materials 8, 9 in parallel with the direction of array of the honeycomb structure materials 10, and the others are faced oppositely into a bathroom and the whole is deformed while using both ends as lower ends. Steam on the inside of a ceiling board 7 is not very cooled by the outside air because the ceiling board 7 has heat-insulating properties, and steam on the inside is hardly condensed. A small quantity of water droplets condensed on the inside of the ceiling board 7 flows toward the wall of the bathroom, and further flows toward a floor face.