Central locations for schools and other educational institutions are a rare commodity in the densely built-up and rapidly growing city centres. Sometimes, however, there is the chance to re-densify existing plots. One example of this method is the extension on the site of the Längenfeldgasse vocational school in the 12th district in Vienna. A new all-day elementary school attended by 425 children, a vocational school for the hospitality industry and another for trade and administration, in which a total of 620 trainees can be taught, were created. There is also a creative and sports area for the all-day elementary school, a practice enterprise, and a bistro for the vocational schools as well as other shared educational rooms and open and roof areas including playing, learning and relaxation areas.
|Name||Vocational School Längenfeldgasse|
|Location||12. Wiener Bezirk|
|Architect||PPAG architects ztgmbH, Wien|
|Products||approx. 4.700 sqm DELTA®-FASSADE COLOR PLUS in special color light blue (NCS 0540-B10G) with system accessories|
The architectural concept was developed by the company PPAG architects ztgmbH, Vienna, whose design received first prize in the EU-wide competition of the city of Vienna. The ensemble consists of a two-storey base building housing the entrance and various functional areas on the ground floor. The four clusters of the elementary school are located on the first floor. A four-storey, strongly structured building block is built on part of this base building connecting to the existing vocational school and providing the training rooms for the two new vocational schools. Playing areas, terraces to relax and even a vegetable and herb garden for the trainees of the vocational school for the hospitality industry were created on the residual free roof areas.
The building was constructed by using a simple reinforced concrete construction; large parts of the vertical support structure were planned as prefabricated components for rapid construction. The facade consists of prefabricated lightweight construction components clad with perforated sheets. “The materials mediate internally and externally between the think tank and the feeling at home and stand for contemporary learning. Hard and soft surfaces [...] lead to a continuation of the ambiguity and transitions of the room,” the creator of the draft wrote in his project description. The very matter-of-fact metal facade also stands in an exciting contrast to the light blue facade strip installed behind it. The DELTA®-FASSADE COLOR PLUS , specially manufactured for this application in a special colour, creates a three-dimensional depth effect by playfully breaking through the cool perforated sheet aesthetics. Depending on the point of view and the lighting conditions, the facade impresses with its spectacular variety of optical effects. During the passage from diffuse light to direct sunlight, the appearance changes as well as when the observer's perspective changes.
However, the blue facade membrane is not only convincing thanks to its aesthetic potential, but above all because of its technical properties as a water, driving rain and windproof protective layer for the construction behind it. The material consists of a highly tear-resistant polyester fleece with a waterproof special coating quickly draining away rainwater in a kind of lotus effect. The particularly homogeneous fleece structure with high fibre density ensures high strength and significantly higher level of UV protection. With an SD value of approximately 0.02 m, the membrane protects the insulation layer against moisture from the outside, by at the same time guaranteeing an ideal vapour permeability for room moisture penetrating the construction from the inside.