Patent ID: 8420204

Claim:
A building board in which an impregnated coating film, an aqueous coating film, a solvent-based clear coating film and a top clear coating film are formed, in this order, on a surface of a base member; wherein the aqueous coating film is formed of a synthetic resin and a fireproofing agent; the top clear coating film is formed of a UV-curable type resin and a fireproofing agent; an amount of the fireproofing agent in the aqueous coating film is 10 to 50 wt % with respect to solids of the aqueous coating film; an amount of the fireproofing agent in the top clear coating film is 5 to 20 wt % with respect to solids of the top clear coating film; and a total calorific value measured in accordance with ISO 5660, for 20 minutes using a cone calorimeter, is smaller than 8 MJ/m 2 .