... insulated panel sandwich teja the sandwich material can be EPS,rockwool,glasswool,etc.sandwich panel for roof, width:960mm or 980mm,sandwich panel for ... sophisticated technologExpanded Polystyrene Sandwich panel, also called composite panel, is a cost efficient prefabricated roofs element. Sandwich panels can be ... be mineral wool, polyurethane, polyisocyanurate, or polystyrene. panel sandwich teja