increasing urban density:
In addition to numerous technical specifications, the specific structure of the historic building, a very tight budget and local building regulations constitute a strict corset for this roof extension. The basic idea for the design was to reinterpret the spatial qualities of a classical attic. Due to the limited corridor space the apartments have been designed as a zoned `` Loftspace'' on two levels. Deep cut in terraces, stairways and spatial requirements of the existing structure (chimneys, fire walls, etc.) give every apartment its own individual quality. From the public entrance floor up to the private gallery level, the functions organize self-explanatory within each unit. All apartments are accessed from the inventory level and spatially structured as duplex apartments. This allows all units north/south or east/west orientation. The deep cut in terraces on the lower level structure the floor plan and form an attractive outdoor space above the rooftops of Vienna. The generous glazings bring a maximum of light and views into every apartment, without expensive sloped glazing. In the upper part ''bedroom dormers'' offer exciting looks into the night sky, while private bathrooms incl. outdoor showers are orientated towards the inner courtyard.
construction:
The wood concrete composite ceiling above the last level meet the stringent structural requirements and ensures optimal load distribution. The main, lightweight structure consists of a steel / wood hybrid system. The design principle of solid timber structures (ceiling and wall parts from laminated timber elements) reduces the amount of steel and reduces element heights to an absolute minimum. The high degree of prefabrication and parallel works on site reduce construction time and save costs.
Team: DI Bernadette Luger, Arch Michael Murauer, DI Renata Véghová.
Visualization: Workspace
HKLS/ Electrical: PCE Planning Consulting-Engineering GmbH
Baupysik: Stockinger & Partner
Timber Construction Contractor: Oben Auf GesmbH
Site: Lederergasse, Vienna
Client: private
Completion: 2015
Floor Area: 388 m²