Transparent Insulation Materials in Building Retrofit: Potentials for Terrassenhaussiedlung Graz

Alexander Eberl*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference paperpeer-review


This paper investigates the potential of 3 market available transparent insulation materials (TIM) in building retrofit by the case study of the iconic1970ies housing estate Terrassenhaussiedlung in Graz, Austria. To achieve this, different façade configurations are modeled in a 2D-simulation environment (HTflux) and tested in a dynamic simulation environment (IESVE) for different orientations and overshading situations. The results show that that even low-tech TIM can outperform conventional insulation materials in terms of heating energy demand, when applied to façade areas with high solar exposure, while only transparent aerogel can compete with conventional insulation materials on badly exposed areas.
Original languageEnglish
Title of host publicationBauSIM 2020 - 8th Conference of IBPSA Germany and Austria
Subtitle of host publication23-25 September 2020, Graz University of Technology, Austria. Proceedings
EditorsMichael Monsberger, Christina Hopfe, Markus Krüger, Alexander Passer
Place of PublicationGraz
PublisherVerlag der Technischen Universität Graz
Number of pages9
ISBN (Electronic)978-3-85125-786
Publication statusPublished - Nov 2020
EventBauSIM 2020: 8. Deutsch-Österreichische IBPSA Konferenz - Technische Universität Graz, Virtuell, Austria
Duration: 23 Sept 202025 Sept 2020


ConferenceBauSIM 2020


  • Retrofitting
  • refurbishment strategies
  • facade system
  • building physics
  • building simulation
  • solar energy

ASJC Scopus subject areas

  • Architecture
  • Building and Construction
  • Renewable Energy, Sustainability and the Environment

Fields of Expertise

  • Sustainable Systems

Treatment code (Nähere Zuordnung)

  • Experimental


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