... polystyrene, Polyurethane, crystal cotton and rock cotton as core material, it is over-light architectural board heated and ... (1/20---1/30 of concrete roof), heat preservation, heat insulation(its heat conduction coefficient is 0.034W/mk), rapid ... halls,gymnasiums,freezing stores and purification workshops (tempkeeping,heat insulation,weight bearing,weatherproof,rich color and good appearance ...