1\ fast contruction,save space 2\ light weight 3\ sound insulation 4\ heat preservarion 5\ fire protection,water proof The filler is mix with Foam-grain and special cement, this kind of structure can reduce much weight of the wallboard, and achieve the purpose of heat proof, sound proof, fire proof. And also resistance to Degradation, Mildew, Termites. The Foam-grain are equally spread out as a ...