House OTF House OTF

Episode

ご夫妻と三姉妹のための住宅。
駅前の利便性の高い高層マンション暮らしだったご家族は、毎年夏休みに奥様の実家のある沖縄で過ごすことを恒例としておりプールで泳ぐ夏休みを楽しみにしていた。自宅を新しく建てるにあたりこの毎年恒例の夏の楽しみをもっと長く自宅で楽しめるように、沖縄のリゾート施設のように夏を過ごせる家が強いご要望でした。それは何よりも子供達と過ごす夏、一緒に取る食事など毎年季節ごと行事ごとに思い出が蓄積していく、そんな家にしたいというご夫婦のお考えから自宅で過ごす子供達との時間が楽しく豊かなものになることが第一優先事項となった。

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Planning

まずはこの家にとってハイシーズンとなる夏に輝く太陽のもと南の島のビラのようなプール、心地よいアウトドアリビングを実現するための配置として何が適正か、建物と2.25m×7mのプール、アウトドアリビングの配置シミュレーションを重ねた。その結果、リビングを中心に日当たりの良い配置ができる敷地ではあったが、今回は一日の半分は陽が当たらないリビングになるように配置することがベストであると判断した。
敷地南側に低いボリュームを配置し、北東向きの庭に面した一番大きな開口部に二段の庇を設け、夏は午後からLDKとアウトドアリビングに日陰を作り出し冬は低い太陽の日射をLDKに深く取り入れるようになっている。またLDKの一番高い所に設けられたハイサイドの窓を開けると家の中を自然に空気が流れ心地よい風を感じることもできる。夏の午後、プールは日差しに包まれ、アウトドアリビングには建物の影が深く落ちることでデイベッドに寝転び快適に過ごすことができるようになっている。
この計画は冬のリビングに陽があまり入らないことで暖房に頼る時間が長くなる事がデメリットだが、屋根の形状と広さから太陽光発電の効率が良く、冬のリビングダイニングは自然エネルギー利用の床暖房によって十分暖かい。ここ最近の猛暑と長い夏になりがちな気候を考えた時に、夏を過ごすための方法として陽を入れないリビングとプールの組み合わせはとても有効であるように思う。
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Episode

A house for a couple and their three daughters. The family had been living in a high-rise condominium in a convenient location near the station. Every summer, they would travel to Okinawa, where the wife’s family resides, and enjoy their vacation by swimming in the pool. When building their new home, the family wanted to extend this annual summer tradition and create a house where they could enjoy a summer vacation similar to a resort in Okinawa. This was a strong request from the family, particularly the couple, who wanted the home to be a place where memories with their children would accumulate throughout the seasons and holidays. The first priority was to create a home that would enrich their time spent with the children, making it a joyful and fulfilling place to live.
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Planning

The primary consideration was to design a space that would embody the essence of a summer retreat, with a pool and a comfortable outdoor living area, like a villa on a southern island under the radiant summer sun. The configuration of the building, the 2.25m x 7m pool, and the outdoor living space underwent multiple simulations. Although the site was favorable for good sunlight exposure, we came to the conclusion that the living room should be positioned to receive sunlight for approximately half the day.
A lower volume was placed on the southern side of the site, with the largest openings facing a northeast-facing garden. Two layers of eaves were added to provide shade to the living room and outdoor space in the afternoon during the summer, while allowing the low winter sun to penetrate deeply into the living room. Additionally, a high-side window located at the highest point of the living room helps facilitate natural airflow through the house, offering a pleasant breeze. In the summer afternoons, the pool is bathed in sunlight, while the shadow of the building deepens over the outdoor living area, making it possible to relax comfortably on a daybed.
While the design does have the downside of relying more on heating in the winter, due to limited sunlight in the living room, the roof shape and size of the house make solar power generation efficient. The living room is sufficiently warm with the use of underfloor heating powered by renewable energy. Considering the recent trends of extreme heat and long summers caused by climate change, the combination of a sunless living room and pool is an effective strategy for enjoying summer comfortably.