noun which may take the genitive case particle 'no'
tatami-matted; covered with tatami
Describes a room or floor that is laid with tatami mats. Used attributively with の.
この旅館は全室畳敷きです。
All rooms in this inn are tatami-matted.
畳敷きの部屋でくつろぐ。
Relax in a tatami-matted room.
畳 is the tatami mat itself, while 畳敷き describes the state of being covered with tatami.
Compound of 畳 (tatami) and 敷き (noun form of 敷く, 'to spread'). Literally 'tatami spreading'.