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J. Dreyer, A. Korjenic:
"Investigation of the hygrical-thermal suitability of vacuum insulation boards for refurbishing of Viennese "Gründerzeit"-buildings";
Vortrag: 7th International Vacuum Insulation Symposium, Dübendorf-Zürich, Switzerland (eingeladen); 28.09.2005 - 29.09.2005; in: "proceedings", (2005), S. 139 - 144.

Vacuum insulation boards is a very interesting building material due to their high insulating efficiency
attainable with small thickness. For instance the heat conductivity (0,0045W/m.K) is lowered by the
good insulating efficiency of the vacuum and is approximately 10-times lower than with conventional
insulating materials. Thus the thickness of the insulation board can be reduced by a factor 5 to 10. The
insulation board consist of a powder core of a fine nano-structured silica acid and are coated with
special high barrier foils, which can hold the necessary vacuum over decades of years. This kind of
insulation is suitable for building, which should be become very well insulated and only a small
thickness is available, or also for retrofitting measures, if the appearance of the building should not be
changed. It offers itself for parapets, slim facade constructions, floor insulations, internal insulations,
as well as for external insulations acceptable possibilities.
In the context of a project for the development of reconstruction strategies for buildings of the period of
"Gründerzeit" it was tried to find out whether the vacuum insulation is suitable for an efficient energetic
increasing of the insulation level of houses with facades worth to conserve and standing under
monument protection. Internal and external insulations were examined. Further vacuum insulation
boards were investigated embedded in render and plaster systems and situated in different element
connection. To find out the thermal-hygrical behaviour of those elements and systems simulation
procedures were used.

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