ARCHI-CLE
これは、東京の住宅密集地に単身者向けの個人住宅。仕事柄、さまざまな国に暮らしたことのある建主は現代のノマドともいえ、友人を招いたり、気ままに自分の時間を楽しみながら住む家を設計した。都会の中でキャンプをするように日常を楽しめる家は建主のライフスタイルにピッタリだと感じた。
敷地は間口の狭い接道面を除く三方を建物に囲まれており、周囲に大きく開口が設けられない条件の中で日中は膜屋根からの柔らかな光が入ってくる。優しい光に満たされる明るい2階のパブリック空間に対し、1階は寝室や浴室などプライベートな空間で、外光を絞り、穴蔵のように落ち着いて休み眠れる場所となっている。限られた敷地の中で外に庭をつくる代わりに光の入る吹抜けに樹木を植え、庭をつくった。室内にあることで窓外のガラス越しに見える樹木ではなく、直に植物に触れながら生活ができる。
屋根全体は柔らかな膜素材だから容易に実現できる3次元カーブになっている。屋根の二重膜構造は上膜、下膜、2枚の膜の間に構造体と断熱材を挟み込み、下膜を構造のカットティの2辺にカテナリーを描くように引っ掛け、半円型のライトチューブの並ぶ天井とした。ライトチューブの中の空気層は断熱層を形成すると共に重力換気により下から上に空気が循環し快適な室内環境を保つことができる。膜屋根は直に空は見えないけれど、光によって周囲の環境の変化を感じることができる。日が昇るにつれて段々と明るさを増し、夕方になると除々に赤く染められる。晴れた日と曇りの日での明るさが変化する。屋根が皮膚のように外界の変化を映し取り感覚的に伝えてくれる。
構造担当 / 平岩構造計画
竣工日 / 2022.07
構造・構法/ S
規模 / 60㎡
敷地面積 /
建築面積 /
延床面積 /
It is a private residence located in a dense residential area in Tokyo. Like camping in the city, the home is designed for the owner to enjoy the everyday life of inviting friends over and unwinding in his own space. The adaptiveness of the home and its functions are reflective of the owner’s nomadic lifestyle.
The site is enclosed by its surrounding buildings on all sides except for the narrow frontage facing the street. Since this site condition restricts from having large openings in the exterior walls, light is brought in from above. The membrane roof brings soft diffused light into the second floor and the atrium carries the light down to the ground floor. While the second floor is a brightly lit public space, the ground floor contains private spaces such as the bedroom and the bathroom with reduced natural daylight. Like being inside a dimly lit cave, it is a calm space to relax and sleep. To maximize the building footprint within the site boundary, an indoor garden with a tree is placed in the skylit atrium in lieu of an exterior garden. By bringing the garden inside, the owner can live in direct contact with nature, rather than solely observing nature through the window.
The overall roof is constructed in a bendable membrane material to create a three-dimensionally contorted surface. This roof is a double-membrane structure made of an upper and lower membrane with the structure and thermal insulation sandwiched in between. The lower membrane is hooked to the ends of T-shaped structural beams in a catenary curve shape, creating a ceiling lined in semi-circular light tubes. The air space within the roof acts as the thermal insulation layer and provides natural ventilation by circulating the air from the bottom to the top to maintain a comfortable indoor environment. Although the sky is not directly visible from the membrane roof, one can sense the fluctuations of the environment through the changes of the light. As the sun rises, the space gradually becomes brighter, and in the evening, the space slowly becomes redder by the warm light. The brightness also varies between sunny and cloudy days. The roof acts like a layer of skin that transmits the changes of the exterior to the interior and transforms one’s senses.
Structural Engineer / Yoshiyuki Hiraiwa Structural Engineers
Completion Date / July 2022
Main Structure and Construction / Steel
Size / 60㎡
Building area /
Building scale /
Total floor area /
