Sustainable Architecture in Vorarlberg

Sustainable Architecture in Vorarlberg

Vorarlberg’s successful combination of a simple, yet sophisticated regional building style with sustainable construction methods has culminated in a model for architecture worldwide. This book presents particularly successful projects of various typologies from recent years and portrays their development from design idea to built detail. The documented buildings by Cukrowicz Nachbaur, Christian Lenz, Oskar Leo Kaufmann + Albert Rßf, Hermann Kaufmann, Marte Marte, Martin Rauch, Dietrich Untertrifaller, Baumschlager Eberle, and others focus on innovative energy strategies and advanced construction techniques. All plan and detail drawings were specifically prepared for this book, allowing for easy comparison of the projects.

Ulrich Dangel Sustainable Architecture in Vorarlberg

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Energy Concepts and Construction Systems Ulrich Dangel

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1 Elementary School Doren Cukrowicz Nachbaur Kirchdorf 2, 6933 Doren

Germany

2 Ski Lodge Schneggarei Katia Schneider + Gerold Schneider, Allmeinde Architektur, Philipp Lutz Tannberg 629, 6764 Lech am Arlberg

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3 Parish Church St. Ulrich Christian Lenz Hauptstraße 15, 6840 Götzis

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4 Rüscher Residence Oskar Leo Kaufmann, Albert Rüf 6882 Schnepfau

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5 Community Center Übersaxen Matthias Hein Dorfstraße 2, 6830 Übersaxen

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6 Olperer House Hermann Kaufmann Dornauberg 110, 6295 Ginzling

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7 Community Center St. Gerold Cukrowicz Nachbaur Faschinastraße 100, 6722 St. Gerold

Vorarlberg

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8 Metzler Residence Marte Marte Cluniastraße, 6830 Rankweil-Brederis

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9 SySTEM3 Oskar Leo Kaufmann, Albert Rüf Jahngasse 9, 6850 Dornbirn

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10 Rauch Residence Planungsgemeinschaft Lehmhaus: Roger Boltshauser, Martin Rauch Torkelweg 17, 6824 Schlins 11 Gasthof Krone Bernardo Bader Am Platz 185, 6952 Hittisau 12 Community Center Ludesch Hermann Kaufmann Raiffeisenstraße 56, 6713 Ludesch 13 Housing Development Fichtenweg Hans Hohenfellner Fichtenweg, 6780 Bartholomäberg-Gantschier 14 Community Center Raggal Johannes Kaufmann Raggal 31, 6741 Raggal 15 Housing Development Sandgrubenweg Gerhard Hörburger, Helmut Kuess, Wolfgang Ritsch, Norbert Schweitzer Mariahilfstraße 17a-d, 6900 Bregenz 16 Secondary School Klaus-Weiler-Fraxern Dietrich Untertrifaller Treietstraße 17, 6833 Klaus

Switzerland

17 Housing Development Mühlweg Hermann Kaufmann + Johannes Kaufmann Mühlweg, 1210 Wien 18 Hugo Kleinbrod Chapel Hugo Dworzak Schützengartenstraße 21,6890 Lustenau 19 Tschabrun Logistics Center Christian Lenz Bundesstraße 102, 6839 Rankweil 20 Hospital Dornbirn Gohm & Hiessberger Lustenauer Straße 4, 6850 Dornbirn 21 Nordwesthaus Baumschlager Eberle Hafenstraße 18, 6972 Fußach

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Rüscher Residence, Schnepfau Oskar Leo Kaufmann, Albert Rüf

Reinterpreted Vernacular This single-family home is located on a sloped site at the main thoroughfare through Schnepfau, a little village in the Bregenzerwald region. Like many new timber-framed houses in this area which is renowned for its sophisticated woodworking trade, this project is the result of a close collaboration between the architect and the client, who owns a millworking company. The client’s parents’ house was originally located on the site, which was tight and presented a lot of constraints. The steep slope also made it challenging for the architect to fulfill the family’s desire for bright, light-filled spaces with a generous open living, dining, and kitchen area. Another important requirement was the physical connection of the new family home to the immediately adjacent millwork shop. The building’s exterior borrows from the local vernacular architecture. The simple volume with gabled roof, covered patio, and wood cladding reflects traditional building elements to be found throughout the region. The house is laid out on three levels. The entrance, garage, laundry, and storage spaces are on the ground floor. The next story houses the open kitchen and living area, as well as a home office which also doubles as a guest bedroom. With vast amounts of glazing, this floor opens up to the street and the impressive mountain views in the distance. A covered patio and outdoor space serve as a buffer between the private home and the millwork facilities and extend the usable space of the main living level. The bedrooms and bathrooms on the top floor are purposely kept private and secluded.

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38 Rüscher Residence, Schnepfau

1 Roof, U = 0.21 W/m2K Standing seam metal roof Waterproofing membrane 18 mm oriented strand board 60 mm ventilated cavity 22 mm fiberboard 100 mm thermal insulation 210 mm prefabricated solid timber panel, consisting of individual layers of spruce and fir boards, joined with hardwood dowels 2 Exterior wall, U = 0.21 W/m2K 18 mm oak siding 40 mm horizontal furring strips 40 mm vertical furring strips 35 mm fiberboard 220 mm mineral wool thermal insulation 200 mm reinforced concrete, fair-faced finish to inside 3 22 mm larch slats 46 mm furring strips 5 mm neoprene pad Waterproofing membrane 5 mm PE mat 20 mm vacuum insulation panel 5 mm PE mat Vapor barrier Coat of bituminous paint 250 mm reinforced concrete slab 30 mm furring strips 12 mm plywood board

9 250 mm reinforced concrete slab, polished finish on top, fair-faced finish to underside 10 175–160 mm precast concrete element, fair-faced finish 11 Exterior wall, U = 0.27 W/m2K drainage mat 120 mm extruded polystyrene thermal insulation 250 mm waterproof reinforced concrete, fair-faced finish to inside 12 20 mm spruce floorboards 60 mm screed 100 mm extruded polystyrene thermal insulation 250 mm waterproof reinforced concrete slab 60 mm gravel bed

4 20 mm spruce floorboards 148 mm reinforced concrete slab 212 mm prefabricated timber panel, consisting of individual layers of spruce and fir boards, joined with hardwood dowels 5 Exterior wall, U = 0.21 W/m2K 18 mm oak siding 40 mm horizontal furring strips 40 mm vertical furring strips 35 mm fiberboard 306 mm prefabricated timber panel, consisting of individual layers of spruce and fir boards, joined with hardwood dowels 11 mm ventilated cavity 200 mm reinforced concrete Ceramic tiles

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6 Exterior wall, U = 0.27 W/m2K drainage mat 120 mm extruded polystyrene thermal insulation 250 mm waterproof reinforced concrete 120 mm services cavity 2 × 12.5 mm gypsum board Ceramic tiles 7 10 mm ceramic tiles 235 mm reinforced concrete slab 100 mm thermal insulation 8 250 mm reinforced concrete slab, polished finish 100 mm thermal insulation

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40 Rüscher Residence, Schnepfau

Construction The building’s architecture with its gabled roof blends into the surrounding context, but at the same time, its construction principles present an unconventional departure from traditional timber-framed houses. Resting on a fair-faced concrete plinth, the walls, ceilings and roofs of the upper levels are made of prefabricated solid timber panels.

These panels consist of eleven layers of spruce and fir boards, which add up to an overall thickness of 310 mm. The construction system is innovative in the sense that it relies solely on beech-wood dowels to hold the individual boards together. No glues, solvents, or metal fasteners are used. All building materials used for the assembly of the prefabricated panels are environmentally friendly and can be fully recycled. Further, the client attached great importance to untreated surfaces and honesty towards the building’s materiality. This is reflected in the use of solid and single-layered building elements without further addition of final floor and wall finishes. All wooden walls, ceilings, and roofs are made of single-leaf solid timber panels that are not only loadbearing, but also fulfill several other performance requirements. The structural engineer and architect worked closely together to solve the building’s structural challenges. In order to create an open living area without the interruption of columns, only 2.5 m of the top level rests on the concrete staircase core, while 5.5 m cantilevers freely over the living room and outdoor patio.

Due to the choice of construction methods, the routing of all plumbing and electrical services had to be determined before construction began. All switches and electrical outlets had to be located during the planning phase, since every wall and ceiling surface consisted of either fair-faced site-cast concrete or a prefabricated timber panel. Any additional changes to the service installations on-site would not have been possible without severely compromising the project’s minimal aesthetic and were therefore avoided at all cost. This required a lot of upfront coordination by the consultants on the one hand, but on the other hand made the actual construction phase much more efficient, since all these matters had already been addressed and resolved early in the project.

1st floor 1:250

2nd floor

3rd floor

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The exterior surface of the prefabricated timber panels is made of untreated oak boards, which are sanded smooth and installed without any visible joints. Over time, the wooden facades will weather turning a soft gray, and will blend in with the ground floor’s fairfaced concrete finish, creating the impression of a monolithic building volume. For the design of the built-in furnishings and furniture, the architect continued the close collaboration with the client, who was extremely interested in a continuation of the minimized material palette inside the house. The interior finishes are limited to concrete and wood, which are merely oiled and free of any lacquers and solvents. Spruce was used for the walls and ceilings, the floors consist of polished and oiled concrete or spruce floorboards, and all furniture and built-ins are made of oiled oak.

Energy Concept The residence is heated by a wood-chip heating system located in the adjacent millwork shop. The 310 mm-thick solid timber wall panels have excellent thermal properties and provide a U-value that makes any additional insulation unnecessary. Heating costs of the new building are 55 percent of those of a conventional timber-framed house since the walls provide a high thermal mass. The wood panels are able to store large amounts of heating energy during the day and slowly release it back to the interior through the evening and night. The thermal storage capacity of the exterior walls also prevents the home from overheating in the summer, which is a common problem in conventional timber-framed houses.

The prefabricated timber panel system offers the advantage of reduced on-site construction time, excellent fire-rating and acoustics, as well as improved indoor air quality through the absence of toxic glues and solvents. The absorption and release of moisture is delayed, allowing the panels to aid in regulating the interior climate. Further, the solid timber walls have the added benefit of blocking most of the potentially harmful electromagnetic radiation such as wireless phone signals. All of these aspects contribute to the creation of a comfortable and healthy home.

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Olperer House, Ginzling Hermann Kaufmann

Low Energy at High Altitude For over a century, a refuge for hikers and mountain climbers has existed in this exposed location. At an elevation of 2,389 m, the site offers breathtaking views of the surrounding glaciers and peaks of the Zillertal Alps and the Schlegeisspeicher reservoir in the valley below. Refurbishment of the existing building was not a viable solution so in 2005 the decision was made to replace it with a new structure.

New construction at this altitude presents a challenge when it comes to dealing with a building’s energy consumption. First and foremost, the main goal was to create a suitable shelter rather than a self-referential architectural statement. Responding to the existing conditions with a modest design proposal, architect Hermann Kaufmann won the invited competition by advocating “innovation through simplicity.� Consisting of a compact volume, the new building is not a spectacular piece of architecture competing for attention. Rather, it is tuned to the high alpine climatic conditions and is in harmony with its surroundings. The structure is an appropriate response to functional and programmatic requirements and provides simple accommodation for mountaineers. The ground floor houses the storage spaces, kitchen, and the dining area. A large panoramic window affords spectacular views of the reservoir below and the mountain peaks beyond. The basic guest rooms for overnight stays are located on the upper level.

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50 Olperer House, Ginzling

Construction Building at this altitude used to and still does heavily depend on the availability of construction materials. Over a hundred years ago, the existing refuge had been built using stone readily available at the site. Back in those days, the labor-intensive construction of heavy masonry walls was considered a suitable solution since the transportation of large amounts of building materials up the mountain from the valley was not feasible.

Technological advances in the construction industry and the introduction of modern means of transportation such as helicopters have changed the approach to construction in the high alpine environment.

For the construction of the Olperer House, prefabrication techniques in combination with large-format laminated timber panels offered a cost-effective solution which allowed for easy transportation and fast on-site assembly of individual building elements. The building materials, including some 350 prefabricated components, were delivered to the site by helicopter in 913 flights. The entire building was assembled within three days. The main goal when designing the new refuge was to develop a simple structure in which the range and quantity of individual components was purposely kept to a minimum. The architect sought “innovation through reduction,” which is successfully reflected in the clarity of the structural concept and its harmonious relationship with the layout of the interior spaces. Replacing the existing structure, the compact new building with its pitched roof cantilevers 2.5 m over a retaining wall towards the reservoir in the valley below. This concrete wall, which also forms the outdoor terrace, was backfilled with the debris from the demolished original building and has been clad with the local stone found at the site. The two-story structure above consists entirely of laminated spruce timber panels which range from between 125 and 176 mm in thickness and are up to 11 m in length. These prefabricated elements were used for the walls, floor slabs, and even the pitched roof surfaces.

The exterior timber panel walls on the ground floor function as story-height beams and are tied back into the foundation in order to reduce the loads on the building’s cantilevered section. The balustrade below the large panoramic window is suspended between these two walls and in turn carries the floor slabs of the dining area. The interior wall in the center runs the entire length of the building and provides continuous support for the roof plane. Both the floor slabs and roof panels function as shear planes and brace the structure. The timber panels’ unique loadbearing and insulating properties provide both the structural support and thermal insulation for the entire building. Since the house is only operated between mid-June and mid-October, no additional insulation was necessary. To protect the laminated timber panels from the harsh weather, all exterior surfaces including the roof are clad with untreated larch shingles. Over the next several years, these wood shingles will weather and turn a silvery gray, causing the building to blend in even further with its rocky surroundings. During the winter months, hinged shutters protect the windows while removable panels are used to cover up the massive panoramic window. On the inside, the aesthetic qualities of the exposed timber surfaces create a warm and comfortable atmosphere.

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52 Olperer House, Ginzling

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3 42 mm spruce laminated veneer lumber board

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4 166 mm loadbearing laminated spruce timber panel 5 25 mm solid larch folding shutter, smooth finish

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6 Wood window frame with double glazing 7 148 mm laminated spruce timber floor panel, both sides exposed

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10 50 mm larch grating 11 Fireproof joint with two 200 × 27 mm and one 110 × 27 mm screw-fixed laminated veneer lumber boards 12 166 mm laminated spruce timber floor panel, top side exposed 13 94 × 160 mm laminated timber sill beam 14 60 mm rigid insulation Bituminous waterproofing membrane 200 mm reinforced concrete wall

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54 Olperer House, Ginzling

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Energy Concept The architect’s innovative energy concept envisioned an extreme reduction of the building’s energy consumption. Through the extensive use of wood, the house is extremely durable, fully recyclable, and possesses low embodied energy levels. In the absence of any infrastructural improvements, the building’s orientation takes advantage of any solar gain. Since the structure is only occupied during the summer, it was possible to reduce the mechanical services to an absolute minimum.

The building’s low-tech nature provides comfort levels which are commensurate with the visitors’ expectations. The daily electricity demand for the 60-bed house is a mere 29 kWh: 14 percent of this is met by photovoltaic panels on the roof, while 86 percent is generated by a combined heat and power plant which runs on rape seed oil and is necessary for water purification. For every 1 kWh of electricity produced, the plant discharges 2 kWh of waste heat which is used to heat the shower rooms, the kitchen, and the dining area. This is supplemented by a tiled stove which for the next several years will be fired with timber retained from the demolition of the original structure.

The circulation spaces and guest rooms remain unheated while operable windows provide natural ventilation. A small, completely insulated support structure is located next to the main building and serves as an auxiliary shelter during the winter.

The Olperer House’s architecture responds appropriately not only to the site, the local climate, and the seasons, but also to the requirements of contemporary alpine tourism.

Today’s mountaineers are educated and extremely aware of the fragile environment that surrounds them. The simplified existence in the mountains is considered to be a welcoming distraction from the technology-dependent routine of everyday city life. The new building successfully demonstrates that a low-tech approach can go further in its efforts and achieve remarkable energy-efficient results that a high-tech solution might not necessarily be able to offer.

Sustainability Community Center Ludesch Sustainable Paradigm Hermann Kaufmann

Housing Development Fichtenweg, Bartholomäberg-Gantschier Compact and Cost-Efficient Hans Hohenfellner Community Center Raggal Retaining Regional Value Johannes Kaufmann Housing Development Sandgrubenweg, Bregenz Sustainable Living Gerhard HÜrburger, Helmut Kuess, Wolfgang Ritsch, Norbert Schweitzer Secondary School Klaus-Weiler-Fraxern Passive House Sets the Standard Dietrich Untertrifaller

94 Sustainability

The Timber House

1 year of construction: 1763

Page 92: Farmhouses in Bödele, Bregenzerwald

Its excellent insulating properties make timber the obvious building material of choice in the cold climate of the Alps, and it is much preferred over masonry construction. [1, 2] The abundance of timber allowed a tradition of craft and carpentry to evolve over centuries. The Bregenzerwald region in Vorarlberg boasts one of the best preserved timber construction traditions in Europe. Timber construction dominates in all parts of the province, however, and it can be found not only in the mountainous regions, but also at the shores of Lake Constance and the Rhine river valley. If allowed to dry out properly, timber-framed houses are extremely durable and can withstand even the harsh conditions found in the mountains. Careful detailing and assembly techniques can successfully protect untreated wooden building parts such as facades, windows, and doors from rain, wind, and snow. Over time, surfaces facing the sun will be scorched and turn a dark brown, while the shaded sides of a building will turn a silvery grey as they age. By following rules that were established by craftsmen over centuries and handed down from generation to generation, timber houses can last exceptionally long periods of time. Some of the most successful examples in the Bregenzerwald region date back to the seventeenth century. External influences, due to Vorarlberg’s proximity to other countries and its fragmented and varied landscape, contributed to the evolution of several different vernacular house types. This diversity was further enriched by the Walser people, who immigrated from the Swiss region of Wallis (Valais), bringing with them their own rich timber construction tradition.

Timber was plentiful in the beginning of Vorarlberg’s colonization, and one of the first settlers’ main tasks was the clearing of forests. From the Middle Ages to the end of feudalism, timber for building was assigned to the general population by the ruling nobility. Before fossil fuels were available, timber was the sole energy source, in addition to serving as the predominant construction material and for the manufacture of everyday goods. Extensive logging created a shortage, which led to the creation of strict laws and limitations regarding its use. [I] It is therefore no surprise that the origins of the word ‟sustainability” can be found in eighteenth-century European forestry regulations.

In his 1713 publication of ‟Sylvicultura oeconomica,” the first comprehensive treatise on forestry, the German administrator Hannß Carl von Carlowitz used the term ‟nachhaltend” (sustainable) to formulate the concept of sustainability in forestry for the very first time, and the idea of ‟Nachhaltigkeit,” or sustainability, gradually became more widespread in Europe during that century. [II] Vast areas were reforested, measured and divided, soils were evaluated, and plants and animals were classified, and the deforestation was reversed. Forestry academies were founded in Germany, France, and England, and the term was eventually translated into other languages, resulting in the nineteenth-century English term ‟sustained yield forestry,” which would serve as the source for the word ‟sustainability” in the modern sense. Nevertheless, timber remained the cheapest building material for Vorarlberg farmers into the nineteenth century. Almost everything in and around the house was made of wood: the furniture, the paneling in the parlor, the roof covering with several layers of shingles, the firewood for the stove, most of the farming tools, and even the everyday footwear.

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2 Montafonerhaus in St. Gallenkirch

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Hugo Kleinbrod Chapel, Lustenau Hugo Dworzak

The Church Comes to the People

Based at the Reichshofstadion, the soccer club SC Austria Lustenau is famous for its celebrations after home games. Following matches, its players and supporters enjoy themselves in the “Austrian Village,” a grouping of temporary concession booths.

Located right next to the soccer stadium stands, the little ensemble provides food and drinks for about 4,000 visitors. The president of the soccer club observed that “each village has a church, or at least a chapel,” and decided to add a spiritual side to the village’s current commercial and secular character. However, the construction of only temporary structures was allowed, and no additional building permits were supposed to be issued. As a result, the design of a small chapel was developed not only as a temporary solution, but as a mobile structure with the option of moving it to another location at any given time.

Equipped with wheels, the idea was to bring the place of worship to the people rather than the other way around. The chapel’s dimensions of 2.5 m by 5 m correspond to the size of a standard parking space, meaning that the building can be relocated and “parked” anytime and anywhere; and its overall height of 4.85 m allows for easy transport under bridges and overpasses. Employing a simple rectangular floor plan and a pitched roof, architect Hugo Dworzak decided to make the chapel’s exterior shape reminiscent of traditional places of worship. The equilateral triangle forming the gable symbolizes the trinity of Father, Son, and Holy Spirit. During everyday use, the chapel offers seating for nine worshippers while a small door at the front serves as the entrance.

However, the mobile structure can be moved to the playing field for bigger events and ceremonies, where it can open up to accommodate a larger audience. Through folding up its walls on three sides, the chapel’s interior expands to the outside allowing it to engage a larger crowd. The wall surfaces turn into cantilevering roofs which form the shape of the Holy Cross if seen from above.

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152 Hugo Kleinbrod Chapel, Lustenau

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Construction The chapel’s simple structural frame consists of 2 × 4 timber members. Inside, its wall, floor, and ceiling surfaces are entirely clad with horizontal wooden slats which help to generate a warm atmosphere. Consisting of a white textile membrane, the exterior skin is evocative of a tent, emphasizing the building’s mobile and nomadic character. Daylight penetrates through the translucent fabric and wooden slats, making windows unnecessary, while at night, fluorescent lights embedded between the inner and outer shell illuminate the interior and signal the chapel’s sacred nature to its surroundings. The holy Christian symbol appears twice in the little building: the door handle consists of a crucifix, and the slatted wall behind the altar is cut out in the shape of a cross. The chapel also contains a bell which was designed by artist Udo Rabensteiner. Even though the little structure is usually located at the stadium, it can sometimes be seen traveling the streets of Lustenau on the way to a wedding or baptism.

The chapel was named after priest Hugo Kleinbrod who upon return from imprisonment during the war took it upon himself to look after poor children and orphans. Besides founding the Vorarlberg Children’s Village, an organization which focuses on the familybased, long-term care of children who can no longer grow up with their biological families, he also established a soccer club for the local boys of Lustenau, providing them with a sense of belonging and identity.

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170 Project Summary

Elementary School Doren Client: Gemeinde Doren Immobilienverwaltungs GmbH & Co KEG Architect: cukrowicz.nachbaur architekten, Bregenz Project Team: Georg Bechter, Markus Cukrowicz Construction Management: Albrecht Bau- & Projektmanagement, Dornbirn Structural Engineering: Mader + Flatz, Bregenz Geotechnics: 3P Geotechnik, Lauterach Mechanical Engineering: Werner Cukrowicz, Lauterach Electrical Engineering: Ingenieurbüro Meusburger Elektrotechnik, Bezau Building Physics and Acoustics: Spektrum, Dornbirn Date of Completion: 2003 Ski Lodge Schneggarei Client: Schneider Family, Lech am Arlberg Architect: Katia Schneider + Gerold Schneider, Allmeinde Architektur, Lech am Arlberg Philip Lutz, Lochau Project Management: Wolfgang Braungardt Construction Management: M&G Ingenieure, Feldkirch Structural Engineering: M&G Ingenieure, Feldkirch Lighting Design: Halotech, Innsbruck Timber Construction and Carpentry: Michael Kaufmann, Reuthe Date of Completion: 2002 Parish Church St. Ulrich Client: Pfarrei St. Ulrich, Götzis Architect: Christian Lenz ZT GmbH, Schwarzach Project Team: Phillipp Berktold, Gerhard Matt, Michael Päsler Cost Planning and Construction Management: Elmar Gmeiner, Schwarzach Structural Engineering: Mader + Flatz, Bregenz Mechanical Engineering: Reinhard Moser Planungsbüro, Satteins Electrical Engineering: BIW-Planungsbüro für Elektrotechnik, Tschagguns Landscape Planning: Barbara Bacher, Linz Date of Completion: 2008 Rüscher Residence Client: Christian Rüscher Architect: Oskar Leo Kaufmann, Albert Rüf, Dornbirn Structural Engineering: Mader + Flatz, Bregenz Electrical Engineering: Albrich Werner, Schnepfau Prefabricated Timber Panels: Thoma Holz GmbH, Goldegg Date of Completion: 2003

Community Center Übersaxen Client: Gemeindeimmobiliengesellschaft Übersaxen Architect: Matthias Hein, Bregenz Project Team: Michael Abt, Juri Troy, Carmen Hottinger, Markus Cukrowicz Project Management: Gernot Thurnher, Feldkirch Structural Engineering: Mader + Flatz, Bregenz Mechanical Engineering: Klimaplan, Rankweil Electrical Engineering: Wolfgang Dorner, Muntlix Building Physics and Acoustics: Karl Torghele, Dornbirn Date of Completion: 2004 Olperer House Client: Deutscher Alpenverein e.V. Architect: Hermann Kaufmann ZT GmbH, Schwarzach Project Team: Claudia Greußling, Julia Nägele-Küng, Gerold Hämmerle Construction Management: Ernst Pfeifer Structural Engineering: Merz Kaufmann Partner, Dornbirn Mechanical Engineering: Walter Ingenieure, Velburg Electrical Engineering: Walter Ingenieure, Velburg Timber Construction: Holzbautechnik Sohm, Alberschwende Date of Completion: 2008

Community Center St. Gerold Client: Gemeinde St. Gerold Immobilienverwaltungs GmbH & Co KG Architect: cukrowicz.nachbaur architekten, Bregenz Project Management: Stefan Abbrederis Project Team: Christian Schmölz, Michael Abt Construction Management: Albrecht Bau- & Projektmanagement, Dornbirn Structural Engineering: M + G Ingenieure, Feldkirch Ingenieurbüro Burtscher, Raggal Geotechnics: Geotek Dönz + Mähr Mechanical Engineering: TB Cukrowicz, Lauterach Electrical Engineering: Lingg Elektroplanung, Schoppernau Building Physics: Bernhard Weithas, Hard Ecology: Spektrum, Dornbirn Date of Completion: 2009 Metzler Residence Client: Sabine and Reinhard Metzler Architect: Marte Marte Architekten, Weiler Project Management: Clemens Metzler Structural Engineering: M + G Ingenieure, Feldkirch Geotechnics: 3P Geotechnik, Lauterach Mechanical Engineering: Dorfinstallateur, Feldkirch Electrical Engineering: Reisegger Elektro, Feldkirch Building Physics: Bernhard Weithas, Hard Date of Completion: 2007 SYSTEM3 Client: The Museum of Modern Art (MoMA), New york Architect: Oskar Leo Kaufmann, Albert Rüf, Dornbirn Project Management: Jochen Specht Structural Engineering: Merz Kley Partner Timber Construction: Zimmerei Michael Kaufmann, Reuthe Date of Completion: 2008

Rauch Residence Client: Lehm Ton Erde GmbH, Schlins Architect: Planungsgemeinschaft Lehmhaus Roger Boltshauser, Zurich Martin Rauch, Schlins Project Managment: Thomas Kamm Project Team: Ariane Wilson, Andreas Skambas Structural Engineering: Josef Tomaselli Rammed Earth Construction: Martin Rauch + construction team, foreman: Johannes Moll Carpentry: Manfred Bischof Ceramics: Marta Rauch-Debevec, Sebastian Rauch Date of Completion: 2008 Gasthof Krone Client: Helene + Dietmar Nußbaumer Architect: Bernardo Bader, Dornbirn Project Team: Sven Matt Structural Engineering: Ingo Gehrer, Höchst Building Physics: Karl Brüstle, Dornbirn Date of Completion: 2007

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Community Center Ludesch Client: Gemeinde Ludesch Immobilienverwaltungs GmbH & Co KEG Architect: Hermann Kaufmann ZT GmbH, Schwarzach Project Team: Roland Wehinger, Martin Längle, Norbert Kaufmann Construction Management: Albrecht Bau- & Projektmanagement, Dornbirn Structural Engineering: Mader + Flatz, Dornbirn Merz Kaufmann Partner, Dornbirn Zementol, Dornbirn Mechanical Engineering: Synergy Consulting + Engineering GmbH, Dornbirn Electrical Engineering: Wilhelm Brugger, Thüringen Building Physics: Bernhard Weithas, Höchst Ecology: Österreichisches Institut für Baubiologie und Bauökologie, Vienna Timber Construction: ARGE Wucher – Sutter Holzbau, Ludesch Date of Completion: 2005 Housing Development Fichtenweg Client: Fritz Holzbau, Bartholomäberg-Gantschier Architect: Hans Hohenfellner, Feldkirch Project Team: Hansjörg Thum Construction Management: Fritz Holzbau, BartholomäbergGantschier Structural Engineering: Erik Brugger, Bludenz Mechanical Engineering: Bömag Installationen GmbH, Schruns Electrical Engineering: Durig Elektrotechnik GmbH, Schruns Timber Construction: Fritz Holzbau, Bartholomäberg-Gantschier Date of Completion: 2005 Community Center Raggal Client: Gemeinde Raggal Immobilienverwaltungs GmbH & Co KEG Architect: Johannes Kaufmann Architektur, Dornbirn Project Team: Rainer Gebhardt, Alexandra Eichenlaub, Dark Schick, Paul Steurer Construction Management: Wolfgang Summer, Klaus Structural Engineering: Merz Kaufmann Partner, Dornbirn (timber) Thomas Burtscher, Raggal (concrete) Mechanical Engineering: e-plus, Egg Electrical Engineering: Ingenieurbüro Brugger, Thüringen Timber Construction: Sutter Holzbau, Ludesch Date of Completion: 2006 Housing Development Sandgrubenweg Client: Rhomberg Bau GmbH Architect: Architektengemeinschaft Gerhard Hörburger, Helmut Kuess, Wolfgang Ritsch, Norbert Schweitzer Project Team: Baki Kaya Structural Engineering: Mader + Flatz, Bregenz Geotechnics: Andres Geotechnik, St. Gallen Mechanical Engineering: Peter Messner GmbH, Dornbirn Electrical Engineering: Kurt Düngler, Gaißau Building Physics: Lothar Künz GmbH, Hard Date of Completion: 2006 (first phase: building C + D) Secondary School Klaus-Weiler-Fraxern Client: Gemeinde Klaus Immobilienverwaltungs GmbH & Co. KEG Architect: Dietrich Untertrifaller Architekten Ziviltechniker GmbH, Bregenz Project Management: Peter Nußbaumer Project Team: Tobias Dieng, Eva Dorn, Philipp Nagel, Jana Sack Construction Management: Gmeiner BauGmbH, Schwarzach Structural Engineering: Merz Kaufmann Partner, Dornbirn (timber) Mader + Flatz, Bregenz (concrete) Mechanical Engineering: Synergy, Dornbirn Electrical Engineering: Hecht, Rankweil Landscape Planning: Rotzler Krebs Partner GmbH, Winterthur Building Physics: Bernhard Weithas, Hard Acoustics: Karl Brüstle, Dornbirn Date of Completion: 2003

Housing Development Mühlweg Client: BWS Gemeinnützige Allgemeine Bau-, Wohn- und Siedlungsgen. Reg. Gen.m.b.H Architect: ARGE Hermann Kaufmann ZT GmbH, Schwarzach Johannes Kaufmann Architektur, Dornbirn Project Team: Christoph Dünser, Johannes Kaufmann, Martin Rümmele Structural Engineering: Merz Kaufmann Partner, Dornbirn Mechanical Engineering: Pesek Planungsbüro, Felixdorf Electrical Engineering: s.d. & engineering, Vienna Building Physics/Acoustics: Holzforschung Austria, Vienna Landscape Planning: PlanSinn GmbH, Vienna Date of Completion: 2006 Hugo Kleinbrod Chapel Client: SC Austria Lustenau Architect: Hugo Dworzak, Lustenau Construction: Holzbau Stephan Muxel, Au Date of Completion: 2007

Logistics Center Tschabrun Client: Hermann Tschabrun GmbH Architect: Christian Lenz ZT GmbH, Schwarzach Project Team: Philipp Berktold, Carsten Redlich Construction Management: ILF Beratende Ingenieure ZT GmbH, Dornbirn Structural Engineering: Merz Kaufmann Partner GmbH, Dornbirn Mechanical Engineering: ILF Beratende Ingenieure ZT GmbH, Dornbirn Electrical Engineering: ILF Beratende Ingenieure ZT GmbH, Dornbirn Building Physics and Acoustics: Lothar Künz, Hard Logistics: Reinhardt & Arens Gbr, Berlin Date of Completion: 2005 Hospital Dornbirn Client: Stadt Dornbirn Architect: Gohm & Hiessberger Architekten, Feldkirch Project Team: Andreas Xander, Susanne Stöckerl, Otto Brugger Construction Management: Rüsch, Diem, Schuler, Dornbirn Structural Engineering: Rüsch, Diem, Schuler, Dornbirn Mechanical Engineering: GMI Ingenieure, Dornbirn Electrical Engineering: Peter Hämmerle, Lustenau Building Physics: Bernhard Weithas, Höchst Clinical Engineering: MTP GmbH, Hall in Tirol Date of Completion: 2004 (Addition), 2006 (ICU) Nordwesthaus Client: Hafen Rohner GmbH & Co KG Architect: Baumschlager Eberle, Lochau Project Management: Christoph von Oefele Structural Engineering: Mader + Flatz, Bregenz Mechanical Engineering: GMI Ing. Peter Messner GmbH, Dornbirn Electrical Engineering: GMI Ing. Peter Messner GmbH, Dornbirn Glass Manufacturer: Glas Marte GmbH, Bregenz (ICE-H) Date of Completion: 2008