sandwich panel Low cost Waterproof, soundproof, fireproof More size and color Easy installation According ... thermal protection, waterproof, fast construction speed, . Durable and beautiful. The board has different kinds such as splicing type. Inserting, hiding type ... layer: Uses many kinds of metal sheets B) Middle: EPS board, PU board, rock wool 2) Width: 950mm, 1000mm, 1150mm. 1200mm3) Thickness ...