ʻO Dongan hale ʻāpana metala i kālai ʻia i ka panel sandwich decorative, he ʻano mea hou no ka insulation hale waho a me ka hoʻonaninani, i makemake nui ʻia e nā mea kūkulu hale. Aia nā ʻano mea like ʻole o loko me ke kiʻekiʻe kiʻekiʻe, e like me ka pu, eps, pir a pēlā aku. ʻO ka ʻili he AL-ZN alloy coated steel sheet. A no ka insulation, fireproof a dampproof, ʻo ka mea lalo e hoʻohana i ka papa alumini foil, ʻoi aku ka maikaʻi o ka hana ma ka insulation a me ka dampproof.
