Dongan gini karfen sassaka na ado sanwich panel, wani nau'i ne na sabon abu na waje rufi rufi da kuma ado, wanda aka fi so da more kuma mafi magina. Na ciki yana da nau'ikan kayan da yawa masu yawa, kamar pu, eps, pir da sauransu. A saman shi ne AL-ZN gami mai rufi karfe takardar. Kuma don rufewa, mai hana wuta da dampproof, kayan da ke ƙasa suna ɗaukar Layer foil na aluminum, wanda ke da mafi kyawun aiki akan rufin dampproof.
