roofing
/ˈruːfɪŋ/noun
mass noun
1- material for constructing a building's roof屋面材料：
a house with corrugated iron roofing.
一所波纹铁屋顶的房子。
1.1
- the process of constructing a roof or roofs盖屋顶：
jobs such as roofing.
诸如盖屋顶之类的活儿。