Hygrothermal assessment of historic buildings' external walls : preliminary findings from the RIBuild project for Switzerland

To meet the national regulation on building energy needs while preserving the architectural heritage, the renovation of protected historic buildings implies to insulate internally their facades. However, it is a technically risky solution. This work is part of the European project RIBuild that develops guidelines to ensure moisture-safe solutions. For that purpose, historical buildings were monitored to confront the current state-of-the-art of hygrothermal simulations with in-situ measurements. To enforce these calculations, stones used in Swiss traditional construction were characterised, and materials' modelling were investigated. The results of the study will be integrated into a probabilistic web-tool.