... light weight,high strength,flat surface 2,high performance extruded polystyrene(XPS) sandwich foamextruded insulation panels(xPS) moulding ... insulating layer: XPSFoundation plate: XPSInstallation: sticking combined with fasteningMaxium size: 600mm~900mm(width),1200mm~2400mm(longth), ... 1, light weight, high strength, flat surface , with installation advantages and high performance/price ratio;2,very ...