BUILDING BOARD AND MANUFACTURING METHOD THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a building board capable of preventing a decrease in heat insulation property due to dirt and a manufacturing method thereof.SOLUTION: A building board has a heat-insulating coating film and a photocatalyst coating film on a surface of an inorganic plate. The heat-insulating coating film contains a film formation material and organic hollow particles. The photocatalyst coating film contains photocatalyst and a binder and is formed on an outermost side. A manufacturing method of the building board comprises the steps of: applying the heat-insulating coating containing the film formation material and the organic hollow particles on a surface of the inorganic plate; and applying the photocatalyst coating containing the photocatalyst and the binder on the heat-insulating coating film in order to form the photocatalyst coating film.