also: くさや
noun
A small, simple dwelling with a roof made of straw or reeds, often associated with rustic or traditional settings.
山奥に古い草屋が一軒だけ残っている。
Only one old thatched hut remains deep in the mountains.
茅葺き refers specifically to the thatched roofing style or material, while 草屋 is the building itself.
Compound of 草 (くさ, 'grass') and 屋 (や, 'house'). The reading そうおく is the on'yomi version, while くさや is the kun'yomi reading.