JAANUS / tsukiagemado　突上窓

tsukiagemado　突上窓

KEY WORD :　architecture / tea houses

Also written 突揚窓. A skylight built into the sloping ceiling, *kakekomi tenjou 掛込天井, of a tea ceremony room to provide both light and ventilation. It is not positioned between the bamboo rafters, but instead is placed so that one rafter passes across the center of the opening. A wooden frame is built into the roof along with a hinged cover. Traditionally, oiled-paper covered a light frame, aburashouji 油障子 (*amashouji 雨障子), on the inside. When the window is opened, the oiled-paper shouji slides up, and the bottom edge of the hinged cover is pushed up with a pole. Nowadays, glass is used instead of oiled-paper. The exterior appearance and structural methods differ according to the type of roofing used. Preventing leaks is the most difficult problem. Therefore, the hinged wooden cover must fit perfectly to forestall any accumulation of rainwater seeping in along the edges.
Skylights are placed on the sloping roof above the host's mat *temaedatami 点前畳, above the guest's mat *kyakudatami 客畳, sometimes above the hard-packed earthen floor *doma 土間, and on the interior side of a pent roof with a long eave, nokibisashi 軒廂. Some tea ceremony houses have two skylights.
Example: Jo'an Urakuen 如庵有楽苑 in Aichi prefecture; Katsura Rikyuu Shoukintei 桂離宮松琴亭, Kyoto; Daitokuji Gyokurin'in Kasumidoko-no-seki 大徳寺玉林院霞床の席; Daitokuji Shinju'an Teigyokuken 大徳寺真珠庵庭玉軒, also in Kyoto.

Jo'an Uraku'en 如庵有楽苑(Aichi)

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