山間部に生み出すサステナブルな美食の村

Large Glasshouse © Hertha_Hurnaus

Salettl and Fire Kitchen © Hertha_Hurnaus

〈シュタイラーエック・アム・ポーグッシュ（Steirereck am Pogusch）〉は、オーストリアアルプスの標高1050mの峠という立地でありながら、エネルギーと食材を自給自足しつつ最高水準のホスピタリティとガストロノミーを提供する複合施設です。

宿泊施設を有した温室という特徴的な施設や、17世紀に建てられた住宅を改修した空間と新たに設けた開放的な空間を統合した、雰囲気の異なるダイニングルームを有しています。ウィーンとベルリンに拠点を置く建築事務所 PPAG architectsが設計しました。

（以下、PPAG architectsから提供されたプレスキットのテキストの抄訳）

© Hertha_Hurnaus

農村地域は時代とともに発展している。美食家であるシェフ、ハインツ・ライトバウアーとその妻ビルギットがオーストリアアルプスの標高1050mの峠ポーグッシュでこれを示している。

また、ハインツ・ライトバウアー夫妻はこの改築・増築プロジェクトを通して、美食ビジネスがいかに革新的で持続可能なものであるかを示したいと考えた。

© Hertha_Hurnaus

2015年にウィーン市立公園に建つレストラン「シュタイラーエック（Steirereck）」の増築を手がけたPPAG architectsは、2018年に開催された新装プロジェクトのコンペティション〈シュタイラーエック・アム・ポーグッシュ〉も勝ち取り、この大規模な建設プロジェクトは2022年に完成した。

この複合施設には現在、農場、バイオマス発電所、そして最高水準のホスピタリティとガストロノミーが含まれている。PPAG architectsは、宿とキッチンを一新し、新しいサレットル（Salettl：オーストリアにおける東屋）と大小2棟のグラスハウス（希少植物の庭園、宿泊施設、スパを併設）を設計した。

Isometric © PPAG architects

グラスハウス

海抜1,050mを超える高地に建つ2棟のグラスハウスは、特別な挑戦である。研究への熱意、農作物の栽培、そして革新的で型破りな宿泊施設が、この温室の主な焦点である。

2棟はそれぞれ役割が異なり、小さなグラスハウスは温暖地用、大きなグラスハウスは寒冷地用となっている。

Large Glasshouse © Hertha_Hurnaus

Large Glasshouse © Hertha_Hurnaus

Large Glasshouse © Hertha_Hurnaus

Large Glasshouse © Hertha_Hurnaus

大きな温室は年間を通じて植物栽培に使用されるだけでなく、宿泊施設と温室の下には浴場を備えている。

これらの温室はキッチンに新鮮なハーブやスパイスを供給し、新しいアイデアを生み出す舞台裏のような場所でもある。2棟の温室はアトリウムを介して地下のキッチンとつながっており、直射日光をキッチンへと導いている。

Small Glasshouse © Hertha_Hurnaus

Small Glasshouse © Hertha_Hurnaus

石造りの家と木造の家

17世紀に建てられた石造りの家と木造の家は、古い建造物の美しさを尊重しながら厨房の一部へと適切に改修されている。大規模な工事にもかかわらず、地形は可能な限り変更せずに行なわれた。

既存の建造物に対する新しい建物の配置とその間に広がる小道は、ヴァナキュラー建築のエッセンスを表現している。新しく建設されたものが過激であるにもかかわらず、ゾーン間の移行は調和がとれている。

Stone House © Hertha_Hurnaus

Stone House © Hertha_Hurnaus

バー＆ファイヤーキッチン

大きなグリルのあるバー＆ファイヤーキッチンは、最もゲストから見える部分である。日中は明るく透明感がありつつ、空間の中心であるグリルの背景は暗く落ち着いた雰囲気を醸し出している。

ここで使われている木製の部材は、軽量でありながら重い荷重を支えることができる、トラスのような断面をもつオーストリアの木造部材キールステッグ（Kielsteg）である。

この部材を異なる方向に設置することにより、従来は隠される断面が見えるようになっており、中空部分はゲストエリアを照らす間接照明となっている。

Fire Kitchen and Open Kitchen © Hertha_Hurnaus

サレットル

新たに設けたサレットルは、既存の石造りの家と木造の家とともに、雰囲気の異なるダイニングルームを形成している。既存の建物とは対照的に、サレットルは開放的で透明感があり、周囲の自然を眺めることができる。

フレキシブルに変更可能な木製のカーテンにより、シンプルかつ迅速な方法で、さまざまな空間アレンジが可能となっている。

Salettl and the Wooden House © Hertha_Hurnaus

Salettl © Hertha_Hurnaus

サステナビリティ

再生可能なエネルギー供給（暖房、冷房、電気）に重点を置き、資源消費削減のための対策（多様な食料の自家生産、堆肥化といったサーキュラーな取り組み、エコロジカルな建材の選択）を採用し、それに伴う移動の最小化によりエネルギーとCO2消費の削減を補完した。

この新しいデザインは、山間部の孤立した状況にもかかわらず、ほとんどのエネルギーを自給自足する、省資源のホスピタリティ・プロジェクトにつながった。

このプロジェクトは、オーストリア連邦気候保護・環境・エネルギー・モビリティ・イノベーション・テクノロジー省の研究プログラム「City of the Future」の一環である。

Salettl © Hertha_Hurnaus

Shop © Hertha_Hurnaus

以下、PPAG architectsのリリース（英文）です。

The Pogusch is a 1059 m high pass in the Austrian Alps. At the top of the pass is the “Steirereck am Pogusch”, an offshoot of the Viennese restaurant “Steirereck”, which has been among the world’s top gastronomic establishments for many decades, surrounded by its own farmland. With the project of the conversion and extension, gourmet chef Heinz Reitbauer and his wife Birgit wanted to show how innovative and sustainable a gastronomic business can be run.

The challenge was to lead a situation characterized by the experience of nature and a highly sophisticated, contemporary catering business into the future within a harmonious overall solution. Through various interventions, the pre-existing buildings and additions form a village ensemble on the scale of rural development in the mountain landscape.

The new striking buildings are for the most part built into the hillside and blend in as eye-catchers in the surroundings of nature and the traditional built environment. The pre-existing buildings – kitchen, lodging, stone house, wooden house as well as agriculture – were complemented by relevant new ones by PPAG. These include extensive new catering areas such as the “Salettl” for fine dining, the fire kitchen (bar, grill, steam counter, farm store, regulars’ table), the distillery, the kitchens with extensive preparation and staff areas, a kitchen garden in a small glass house, special staff and guest accommodations as well as the extension of visible and invisible infrastructure. In the large glass house, a hybrid of advanced greenhouse and living space that atmospherically fertilize each other, there are integrated sleeping berths as well as a wellness zone with a sauna and a fireplace room. PPAG have also designed numerous details and furniture, which give the project the dimension of an ultra-modern Gesamtkunstwerk – and transport the visitor into an unusual mountain world.

Architecture: PPAG architects
Client: Steirereck Stadtpark GmbH

General planner: PPAG architects
Structural design: Werkraum Ingenieure
Fire protection planning: kunz DIE INNOVATIVEN BRANDSCHUTZPLANER
Infiltration concept and soil expertise: Geologie Weixelberger
Vegetation concept glass houses: Green4Cities
Tendering: Buchegger7

Further planning:
Local construction supervision: Viereck Architekten
Building physics: rosenfelder & höfler consulting engineers
Lighting design: Ing. Johannes Jungel-Schmid
Building services planning: TBH Ingenieur
Landscape architecture: Client and Viereck Architekten

This project is part of the research program “City of the Future” of the Austrian Federal Ministry for Climate Protection, Environment, Energy, Mobility, Innovation and Technology.

Rural areas are developing in line with the times. At the Pogusch in the Austrian Alps, Birgit and Heinz Reitbauer prove this at an altitude of 1050 m: PPAG architects, the minds behind the extension of the Steirereck restaurant in Vienna’s Stadtpark in 2015, also won the competition for the new formation of the Steirereck am Pogusch in 2018. The extensive construction project was completed in 2022. The complex now includes a farm, a biomass power plant, as well as hospitality and gastronomy of the highest standard. PPAG architects are responsible for completely renewed structures in the inn and kitchen, a new gazebo and two unconventional glass houses (with a garden for rare plants as kitchen hinterland, overnight accommodation in cabanes and a multi-storey spa). The realization, in collaboration with the best handicraft companies, allowed for a nowadays unusual level of detail.

Glass houses
Glass houses at this altitude of over 1,050 m above sea level represent a special challenge. A tremendous drive for research, a small amount of crop cultivation and, last but not least, innovative and unconventional guest accommodations are the main focuses of the greenhouses. Off the glass houses, one is cold, the other warm and both have different tasks to fulfill: the large one, which is the cold greenhouse (minimum temperature close to freezing point) is used for year-round plant cultivation. There are also unconventional overnight accommodations, for unconventional guests. A matching special bathing area is located beneath it. Connected to it is the warm greenhouse (approx. 22 °c), which supplies the kitchen with fresh herbs and spices and offers an intimate backstage area where new ideas can be cooked up. Both glass houses are connected to the kitchens located below via atria and enhance them with direct daylight. This large hidden world in the background, which contributes to the well-being of the guest, hardly appears in postcard images. But under the sward there are well-lit workplaces with an elevated spatial quality.

Stone house and wooden house
The pre-existing buildings – parts of the kitchen, the stone house from the 17th century and the wooden house – have been properly renovated with respect of the beauty of the old structures. The useful remained, however widely refurbished. The topography was altered as little as possible despite major construction work. The excavation was returned into the surrounding landscape. The positioning of the new buildings in relation to the pre-existing structure and the pathways that unfold in between express the essence of vernacular construction. The transitions between the zones are harmonious and self-evident, despite the radical nature of what has been newly built. Ultimately, the overall effect is effortlessely normal. Every element was injected with renewed life energy, all the while preserved from unnecessary bluster.

Bar kitchen
The bar and fire kitchen with a large grill is the part of the kitchen that is visible for the guest. Depending on the daytime, it is light and transparent, or atmospheric and dark against the background of the grill: a strong space in the heart of the house. The wooden elements used here – lightweight but able to support heavy loads –are a kielsteg ceiling. When installed in different directions, the trim cuts that would typically be concealed when employed the conventional way, are made visible. The thin, curved plywood panels that connect the upper and lower braces are repurposed as lighting for the guest area.

Salettl
The new Salettl, or gazebo, together with the existing stone house and wooden house, form differentiated dining rooms that can serve different concept of hospitality and atmosphere. In contrast to the pre-existing buildings, the Salettl is open and transparent, with a view of the surrounding nature. Spatial comfort is provided by flexible, changeable wooden slat curtains. A large number of different spatial arrangements can be set up in a simple and quick manner.

Sustainability
The focus was set on renewable energy supply (heating, cooling, electricity), supplemented by measures to reduce resource consumption (diverse on-site food production, circular economy -composting, ecological selection of building materials) and reduction of mobility-related energy and CO2 consumption. The new design leads to an almost energy self-sufficient, resource-saving hospitality project despite its isolated situation in the mountains.

A plus-energy standard was achieved for the entire site. The energy concept combines existing structures with new ones to be built in one system solution. The pre-existing supply systems (150 kW wood chip system, 100m² solar thermal system and a 5 kWp photovoltaic system) form the basis. The new buildings were designed in low-energy standard with partial use of passive house components. Controlled ventilation including heat recovery is standard everywhere. Heat dissipation is based on low-temperature systems (underfloor and wall heating). The greenhouses, strictly separated into a moderately heated and a low heated part, were designed to a high thermal standard. The pre-existing buildings, in a very good thermal condition (50 kWh/m²a), are equipped with controlled ventilation and heat recovery.

「Steirereck am Pogusch」PPAG architects 公式サイト

https://www.ppag.at/projects/steirereck-am-pogusch-en/