kakekomi tenjou　掛込天井

KEY WORD :　architecture / tea houses

Also written 駆込天井, also called *keshou yaneura no kakekomi tenjou 化粧屋根裏の掛込天井. A sloping ceiling formed by the underside of a roof of a tea ceremony house, beneath which a guest sits. The ceiling may have a window set in it to provide more light for the host preparing tea, and is supported by a short wall. The ceiling rafters are round and fairly thick, and follow the pattern established by the rafters on the flat part of the ceiling. The sloping ceiling rafters extend beyond the outer wall as exterior eaves. The rafters may be made of small, unstripped logs, bamboo stalks or bamboo laths. Between the rafters are very thin circular bamboo supports. Usually the rafters are nailed in place, but sometimes they are tied with wisteria vine. Long wooden horizontal slats are often placed over the rafters beneath the rustic roof shingles. A sky light which can be opened is frequently incorporated into this type of ceiling. The size of the skylight varies form 24-30cm. If the ceiling is entirely sloped it is called soukakekomi tenjou 総掛込天井, and is considered ideal for small, simple rustic tea ceremony houses, especially those smaller than 4.5 mats. While many of these ceilings appear to be merely the rough underside of roofs, they are in fact true ceilings of varying heights made beneath the real roof. Example of soukakekomi tenjou: Saiouin Yodomi-no-seki 西翁院淀看の席, Kyoto; Ura Senke Konnichian 裏千家今日庵, Kyoto. *CHADOU SENTEI 茶道筌蹄 states that Souzen 宗全 (1566-1627) favored bamboo rafters placed over wooden splints running parallel to the ridge; while Koushin Sousa 江岑宗左 (1612-72) preferred split bamboo on the same type of ceiling. Examples: Omote Senke Fushin'an 表千家不審庵, Kyoto; Myoukian Taian 妙喜庵待庵, Kyoto; Hassouan 八窓庵, Nara.

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