Thatch material of arrow grass, bilāu; spear grass, gūlun; a roof; i.e., roofing material on a house of thatch or galvanized iron, hihim. It does not include the supporting roof structure.
Atap di bangaw `thatch of a backpack', made of the leaves of the apangdan vine; atap di tudung `thatch of a rain basket', made of the leaves of the gā'ad an atap di tudung plant.