... flat surface and high performance Competitive Price XPS Sandwich Wall PanelSimple introduction: Structure:Structure ... thermal insulation: Flat roof, inclined roof, steel roofing insulation, etc., and the insulation effect is more remarkable2,Exterior wall insulation:3,Insulation,heat insulation,waterproofing4,Ground floor insulation ... has damaging effects on the XPS,such as deformed and sparkling.Avoid ...