Empirical Evaluation of the Durability of Eremospatha spp. (Kekele) Lianas in the Vernacular Architecture of Kisangani, DR Congo: An Ethnoscientific and Observational Approach

Empirical Evaluation of the Durability of Eremospatha spp. (Kekele) Lianas in the Vernacular Architecture of Kisangani, DR Congo: An Ethnoscientific and Observational Approach The vines of the genus Eremospatha, locally known as “Kekele”, are ubiquitous construction materials in the vernacular structures of Kisangani, in the Democratic Republic of Congo. This study aims to empirically evaluate their durability through an approach that combines direct observation, ethnoscientific analysis of local knowledge, and systematic visual inspection. Without resorting to laboratory mechanical tests, this research is based on semi-structured interviews with artisans and users, as well as the observation of 50 constructions to document traditional harvesting, processing, and implementation practices. The results indicate that Kekele lianas, when properly selected and prepared, offer adequate durability for non-structural and lashing applications, with a functional lifespan of up to 8 years under optimal conditions. Protection against humidity and direct contact with the soil are identified as the most critical factors influencing their longevity. This study highlights the richness and validity of vernacular knowledge and underlines the potential of local bio-sourced materials for sustainable and economically accessible construction in an equatorial context.