Portugal’s Wattle and Daub Constructive Legacy

The commitment to technical and scientific innovation for appropriate interventions in buildings with wattle and daub walls requires a comprehensive and authentic approach to pre-existing structures. This involves an in-depth study of traditional heritage, aiming for durable, sustainable, and economically viable repair solutions. Most studies on wattle and daub constructions have focused on Northern Portugal, given the prevalence of this building technique in the region. However, there is a knowledge gap regarding the presence and specific characteristics of these structures in the Central and Southern regions of mainland Portugal, as well as in the Autonomous Regions of the Azores and Madeira. This research broadens the geographical scope, encompassing the analysis of 30 buildings, providing complementary data to existing literature and contributing to a broader understanding of the structural and functional behaviour of wattle and daub walls. The information obtained about traditional materials and construction methods is essential to guide interventions that respect the historical and cultural character of the buildings, while also promoting sustainability and economic feasibility. The results confirmed the presence of wattle and daub constructions in the various areas investigated, highlighting significant diversity in the materials used, both in the timber structures and in the infill and rendering mortars. This variability was observed not only between regions with similar characteristics but also in buildings within the same locality, reflecting local adaptations and the richness of traditional craftsmanship. These findings provide a solid foundation for future interventions and encourage the appreciation of the cultural heritage associated with this construction technique.