... construction. The company color is a color steel sandwich composite panels for the surface layer to glass cotton, wool, polystyrene and ... core layer of new building materials, with light, heat good, sound absorption and good sealing performance, easy construction period is short ... effective width (mm): wall 1200,1150,950 Roof 950 4, the average sound volume: Thickness(mm)5075100150R(dB)20.0021.5023.0024 ...