Headquarters

Project idea (compiled by the architecture office Reinberg)

Landscape solution
The new buildings are built at a right angle to the valley and – together with the mountainside – provide space for the large area of water (pond). The driveway is situated on the western side of the pond, so that the water and the office building (seen twice due to the reflection) can be experienced during the entire approach. The pond is positioned towards the south and ends with the office building. Workshops, warehouse and supplier traffic are located at the back of the office building in the north – not directly visible to visitors.

Architectural concept
The office building is located directly on the waterfront of the existing pool. It is a wood-glass construction with a massive solar storage wall. A glazed southern zone opens up the interior, provides space for communication and makes it possible to experience the water, the weather and the sun. The adjacent area is only lit diffusely (direct light from the north and light from the south that can be controlled via blinds, offer ideal conditions for everyday office life).
The entrance to the building is on the narrow western side, directly on the waterfront. The southern zone is reached via the reception area – through the storage wall – which serves as a two-story customer consultation area – featuring a terrace above the water.
The internal communication centre is a communication island in the centre of the ground floor (information, snacks, contacts). From here, there is also a weather-protected connection to the workshop and the warehouse. The workshop is located parallel to the office and together with the office forms an internal “office courtyard”, that cannot be seen by the customer.
The southern zone features large glazing and a flowing transition between “communication area – inside” and “experience nature area – outside”. In the staircase area, the glass wall is divided by a blue-violet, reflecting collector surface.
A platform over the water creates a connection to the water and makes it possible to walk right over the water. The office building is designed so that the existing old natural pool can remain unchanged and appears as part of the entire water area. The terrace of the old pool provides shade which is particularly useful for consultations with customers in summer.

Traffic concept
The parking spots along the driveway are interspersed with bushes and plants. Via small promenades and a path around the natural pool, visitors can get to know the different areas of the pool.
Internal operations and supplier traffic are completely secluded from the customer area. Trucks can be loaded on the ramp directly next to the supplier driveway from the back or the side. The “free-flying” roof above the warehouse and the ramp area simultaneously serves as weather protection for parking company vehicles as well as for loading. From the east, the warehouse through to the workshop can be accessed on one level.

Energy concept
Highly insulated outside walls and top-quality glazing (u= 0,7 W/m²K) guarantee a minimal loss of energy. The (supply) air is transported in underground channels (pre-warmed or pre-cooled), and is introduced under controlled conditions (constant optimal quality of air) and then discharged via a heat recovery plant. The air is blown into the offices, transported to the open communication area from there and drawn off via the washrooms. The winter sun is passively taken in through the southern glazing and stored in the concrete core of the building, or via the ventilation appliance (heat exchanger). Warm water collectors in the façade cover the warm water supply for workshop and office. This collector device and the building were designed so that the remaining heating demand is exactly equivalent to the amount of biomass energy of the leftover wood from dock construction. This remaining demand for heat is covered by a biomass system. Thanks to the excellent heat insulation, the complete shading of all windows in the south, the underground cooling of the (supply) air (air-pipe underneath the pool) and the automatic night-ventilation, the building is kept cool during the summer. Additional cooling can be introduced by activating the concrete core” (spring water is conducted through pipes in the concrete mass).

Water concept
The existing natural pool shows how a pool looks when the regeneration zone is well-developed. The large water area shows the large swimming area, as well as the different planting concepts between the different docks. A diving platform is situated on the eastern side. In the southeastern area, a reed bed for the entire cleansing of waste water is located. The roof water flows into a seepage area on the ground, which is integrated into the landscaping concept.

The building – key facts

• Client
  Biotop Landschaftsgestaltung GmbH, Weidling
  
  
• Architect
  Dipl.-Ing. Georg W. Reinberg
  
  
• Structural calculations
  Werkraum ZT OEG Vienna
  
  
• Simulation and energy concept
  Patrick Jung, Cologne
  
  
• Heating, ventilation, electric power, etc.
  BPS-Engineering, Vienna
  
  
• Water concept
  Biotop Landschaftsgestaltung GmbH, Weidling
  
  
• Landscaping
  DI Anna Detzlhofer, Vienna
  
  
• Financing
  Raiffeisenbank Korneuburg
  
  
• Companies
  Builder: Fa. Mörtinger GmbH, Vienna
  Carpenter: Fa. Unger, Mischendorf
  Locksmith – steel/glass façade: Raditsch Metallbau GmbH, Purbach
  Locksmith – constructive steel construction: Gottfried Brix GmbH, Günselsdorf
  
  
• Planning
  2001/2002
  
  
• Execution
  June 2002 until April 2003
  
  
• Size of premises
  8,434 m²
  
  
• Surface area
  752 m² office and workshop, 755 m² storage space and roofed-over free space
  
  
• Net space office
  419 m²
  
  
• Net space workshop
  165 m²
  
  
• Roofed-over space
  755 m²
  
  
• Interior space
  2,579 m³ (office and workshop), 1,193 m³ (warehouse)
  
  
• Building materials
  Plywood boards (walls, ceilings, roof). Concrete massive storage wall (central wall), mineral wool thermal insulation (20 cm wall, 30 cm roof), wall surface: open planks, roof: grass on bitumen panels. Wooden windows, wooden doors, loam rendering with wall heating.
  Roofed-over warehouse and outside area – steel construction with profiled sheeting.
  
  
• Natural Pool
  Water area: 950 m²
  Regeneration zone: 240 m²
  Plant filter: 230 m²
  Decking: 115 m²
  Number of pumps: 2
  Number of Biotop carbonators: 6

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