Translation guide
For roofing material, use 茅 (kaya) or 藁 (wara). For a hairstyle, use サッチ (sacchi) or describe it. For a verb meaning to cover with thatch, use 葺く (fuku).
Straw, reeds, or similar plant material used for roofing.
General term for thatch, especially miscanthus reed used in traditional roofing.
この家の屋根は茅で葺かれている。
The roof of this house is thatched with kaya.
Straw, often used for thatching or as a material in traditional contexts.
We visited a house with a straw-thatched roof.
Grass or weeds; can refer to thatch in some contexts, but less specific.
In the old days, they thatched roofs with grass.
A hairstyle with a fringe or thick hair covering the forehead, similar to a thatched roof.
Loanword from English 'thatch', used in fashion contexts for a specific hairstyle.
She got a new thatch hairstyle.
Since 'thatch' as a hairstyle is not widely known, you can describe it as 前髪を厚く垂らした髪型 (a hairstyle with thick bangs hanging down).
To cover a roof with thatch.
The hairstyle 'thatch' is not commonly known in Japanese. Using 茅 or 藁 for hair would be confusing. Use サッチ or describe it.
A hairstyle with thick, hanging bangs is in fashion.