... in weight, heat insulation 3.Installation is con Polystyrene sandwich panel for sale:thickness0.2~1(mm)Effective width950,970,1000,1150,1200 ... factory buildings,storages, exhibition halls, gymnasiums etcAdvantages:1.polystyrene sandwich panel: They all have three layers, upper layer is steel ... with fastening screw so it can endure the impact of hot expansion. Hot! polystyrene sandwich panel for sale