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M. Flegar, U. Pont, A. Mahdavi:
"Retrofitting Potential of Large-Scale Prefabricted Buildings from Pre-"Wende" Times: A Case Study of Croatia";
Poster: Vienna Young Scientist Symposium 2019, TU Wien, Vienna, Austria; 2019-06-13 - 2019-06-14; in: "VSS - Vienna Young Scientist Symposium June 13-14, 2019", K. Ehrmann, H. Mansouri Khosravi (ed.); (2019), ISBN: 978-3-9504017-9-0; 32 - 33.

It is a widely known fact that buildings contribute largely to both worldwide GHG (green-house-gas) emissions and energy consumption. To change that, not only new buildings have to be designed following the principles of low- to zero-energy building, but also the building stock has to be addressed. In many European countries, an extensive stock of prefabricated buildings from pre-"Wende"-times (this means constructed prior to the fall of the Soviet Union) can be found, which particularly are of interest for large-scale retrofit measures. This is due to two major reasons: First of all, many of these prefabricated buildings were generated by industrial mass production of building components (e.g. wall-elements) and were several times combined in identical or rather similar fashion. Thus, retrofit measures can be designed in a feasible and easily applicable way, once the specific element has been subjected to a retrofit planning. The second reason is that such buildings often form the backbone of large residential communities, and as such cannot easily be replaced. Given the large extent of built volume and the poor thermal quality of such constructions, retrofit measures often seem to be more an urgent need than a luxury. This contribution focuses on a specific type of prefabricated houses in Croatia, known as building type JU-61, and on potential retrofit measures. The contribution is based on a recently written master thesis [1].
JU-61 (producer Jugomont) apartment blocks consist of modular units that form rooms with a floor plan size of 360 x 480 cm. To ensure the functional connections between the different units, a shift of connection walls by one third of the length or width of the system was considered. Figure 1 and 2 illustrate the building construction of a neighbourhood in Remetinečki gaj in (Novi-)Zagreb, and a typical two unit floor plan.

(no german abstract)
It is a widely known fact that buildings contribute largely to both worldwide GHG (green-house-gas) emissions and energy consumption. To change that, not only new buildings have to be designed following the principles of low- to zero-energy building, but also the building stock has to be addressed. In many European countries, an extensive stock of prefabricated buildings from pre-"Wende"-times (this means constructed prior to the fall of the Soviet Union) can be found, which particularly are of interest for large-scale retrofit measures. This is due to two major reasons: First of all, many of these prefabricated buildings were generated by industrial mass production of building components (e.g. wall-elements) and were several times combined in identical or rather similar fashion. Thus, retrofit measures can be designed in a feasible and easily applicable way, once the specific element has been subjected to a retrofit planning. The second reason is that such buildings often form the backbone of large residential communities, and as such cannot easily be replaced. Given the large extent of built volume and the poor thermal quality of such constructions, retrofit measures often seem to be more an urgent need than a luxury. This contribution focuses on a specific type of prefabricated houses in Croatia, known as building type JU-61, and on potential retrofit measures. The contribution is based on a recently written master thesis [1].
JU-61 (producer Jugomont) apartment blocks consist of modular units that form rooms with a floor plan size of 360 x 480 cm. To ensure the functional connections between the different units, a shift of connection walls by one third of the length or width of the system was considered. Figure 1 and 2 illustrate the building construction of a neighbourhood in Remetinečki gaj in (Novi-)Zagreb, and a typical two unit floor plan.