BS EN 13915. Prefabricated gypsum plasterboard panels with a cellular paperboard core. Definitions, requirements & test methods Gypsum, Gypsum plaster, Plasterwork, Prefabricated parts, Construction materials, Boards, Board (paper), Wall linings, Construction systems parts, Partitions, Performance, Strength of materials, Fire resistance, Water vapour, Permeability, Thermal resistance, Performance testing, Sound insulation, Cellular materials, Panels