I ka hoʻohana 'ana i ka hale hana maila,' ole loiloi / hana 'alapila i ka hana hana alapila, paila kihi, a me nā mea no Galvalume (GL) i nā kumu hao kila / nā kulu maikaʻi i kahi metala waihona maikaʻi no nā coil / poly sheet steel PPGL.