
Rethinking building envelopes: Lessons from Slovenia’s case

Rethinking building envelopes: Lessons from Slovenia’s case
Image of Slovenian demo case (INFINITE Building Renovation)
The Slovenian case study focuses on a medium-sized, multi-use building, constructed between 1970 and 1980, featuring steel-reinforced concrete frames with brick masonry. The building comprises 40 single residential units across four floors and an attic, with offices on the ground floor. Additionally, it is connected to a district heating system.
In this technical example, INFINITE Building Renovation aims to improve the building’s overall energy performance despite its poorly insulated envelope and inefficient windows.
The main challenges INFINITE faces in this study include ensuring coordinated energy system control while the building remains connected to a district heating network, replicating INFINITE’s solutions for much smaller apartments, and managing the economic feasibility of the project in a multi-owner building.
To address these challenges, the project employs a technology kit composed of smart energy systems. In the case of the Slovenian building, Building-Integrated Photovoltaics (BIPV) will be installed on the south-facing façade, while thermal insulation will be enhanced on the opposite façade using a passive kit. Additionally, balconies on the northern façade will be converted into loggias to improve the building’s thermal insulation. Where necessary, the energy and fresh air distribution kit will be implemented to provide heating and cooling. The building will also be equipped with smart windows. The possibility of using either the green kit or BIPV for the apartment’s roof is currently being considered.
This case study highlights the urgency of continuously renovating Europe’s building stock year after year to achieve the objectives of INFINITE Building Renovation and meet the European Parliament’s Committee on Industry, Research and Energy goal of decarbonising cities by 2050. To this end, INFINITE employs multidisciplinary design tools, adaptable management systems, and technological kits.