11-04-2010, SCHOTT North America
High-Tech for Historic Windows
Bauhaus-Universität Weimar now furnished with restoration glass from SCHOTT
Grünenplan, November 02, 2010 – The Bauhaus-Universität Weimar celebrated its 150th anniversary in October. To mark this occasion, the university had two of its historic buildings restored, the Van de Velde building and the “Bauhaus.Atelier”. Now that they’ve been furnished with restoration glass from the technology company SCHOTT, even the window panes in the two buildings look authentic. At the same time, these special glasses with a slightly irregular surface meet current requirements for security, insulation, solar and UV protection.
The glass roof of the “Bauhaus.Atelier” that was built in 1886 relies on a delicate metallic framework. To mark the occasion of its 150th anniversary, the Bauhaus-Universität Weimar had the building restored. Now, thanks to restoration glass from SCHOTT,
As one of the original locations of the Bauhaus School of architecture, the Van de Velde Building has been added to the list of World Heritage Sites by UNESCO. Originally built for the animal painter Albert Brendel, the “Bauhaus.Atelier” is considered to be a technical cultural monument. “The authentic restoration of the two buildings also called for recreating the appearance of the windows used at the time of construction,” says Professor Dr.-Ing. Gerd Zimmermann, Rector of the Bauhaus-Universität Weimar. “At the same time, we also put a lot of emphasis on glass functions that are consistent with the latest state-of-the-art technology.”
During the renovation of the Van de Velde Building that was taken care of by the two architectural firms Pitz & Hoh Architektur und Denkmalpflege GmbH and Junk & Reich Architekten, Planungsgesellschaft mbH, the Weimar-based woodworking firm Heider-Wallisch GmbH reconstructed the historic windows. They elected to use insulating glass units from SCHOTT in a combination that was used for the first time ever. The outer pane consists of the restoration glass “Tikana”. This glass is characterized by a slightly irregular surface structure. In this case, it was also given a sun protection coating that contributes towards controlling the climate inside. The inner pane is made of float glass. This pane was processed using a heat-resistant coating that reduces heat loss through the glass during the winter. The space between the panes is only four millimeters and has been filled with the inert gas krypton to ensure the best possible thermal insulation.
The glass roof of the “Bauhaus.Atelier” that was built in 1886 relies on a delicate metallic framework. The production of the model forms, in other words glass panes with different angles, really posed a challenge. SCHOTT delivered a total of 434 laminated glass units for the “Bauhaus.Atelier”, which has been restored and renovated by the architect Weimar Planung und BauGestaltung Jörg Hänel. The glass painting firm Ernst Kraus reconstructed the roof and wall glazing. Several layers of PVB films were integrated between the outer glass pane that consists of the restoration glass “Restover” and the inner pane of clear glass that reduces UVA transmission almost completely. Thanks to its lively surface structure, “Restover”, the product that was selected as the outer pane of the compound, resembles the window panes manufactured around the turn of the century.
SCHOTT manufactures the restoration glasses “Restover” and “TIKANA” both as drawn glass using the traditional Fourcault process that has essentially been replaced by more modern techniques. The irregular and lively looking structure that is characteristic of historic window glass is achieved by manipulating the production process.
SCHOTT is an international technology group that sees its core purpose as the lasting improvement of living and working conditions. To this end, the company has been developing special materials, components, and systems for more than 125 years. The main areas of focus are the household appliances industry, pharmaceuticals, solar energy, electronics, optics, and the automotive industry. The SCHOTT Group is present in close proximity to its customers with production and sales companies in all its major markets. The Group’s approximately 17,400 employees generated worldwide sales of approximately 2.3 billion Euros in the fiscal year 2008/2009. The company's technological and economic expertise is closely linked with its social and ecological responsibility. The SCHOTT AG is an affiliate of the Carl-Zeiss-Stiftung (Foundation).
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As one of the original locations of the Bauhaus School of architecture, the Van de Velde Building has been named a World Heritage Site by UNESCO. To mark the occasion of its 150th anniversary, the Bauhaus-Universität Weimar had the building restored. Now,
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