... material kinds, the sandwich panel includes in Polyurethane(PU), polystyrene(EPS) and rock wool or glass wool sandwich panel, the up ... waterproof, fast construction speed, . Durable and beautiful. The board has different kinds such as splicing type. Inserting, hiding type ... bottom layer: Uses many kinds of metal sheets B) Middle: EPS board, PU board, rock wool 2) Width: 950mm, 1000mm, 1150mm. 1200mm3 ...