Assessing and Benchmarking a Multifunctional Plug-and-Play Façade for Building Renovation: Advantages and Limitations in the Construction Process

The revised Energy Performance of Buildings Directive and Energy Efficiency Directive aim to accelerate the energy transition of the European building stock; however, progress remains insufficient. Off-site construction (OSC) and industrialised systems, such as Plug-and-Play (PnP) systems, are considered pivotal towards more efficient renovation practices. In this study, a PnP facade for building renovation—developed in an H2020 EU-funded research project—has been analysed with the following objectives: (i) benchmarking and assessing the construction process with a PnP facade system through the data gathered in two renovation scenarios, and (ii) identifying advantages and limitations related to implementing the technology. Two buildings—an early adopter in Budapest and a demonstration case in Pamplona—have been selected as renovation scenarios to validate the implementation of the system, testing different levels of technological integration and prefabrication. Key findings reveal that the PnP system offers significant advantages, including streamlined installation processes and reduced on-site waste compared to a conventional ventilated façade. However, the need for high workers’ tolerance, sensitivity, and precision during installation, as well as coordination protocols, has been highlighted to ensure a smooth implementation. This research contributes to the body of research on OSC technologies for building renovation, offering practical insights towards developing more sustainable construction practices.