Uncertainties About the Water Vapor Permeability of Raw Earth Building Material

In order to reduce the energy impact of building materials and, more generally, the environmental impact, raw earth can be an alternative to the conventional building materials like cement and fired earth bricks. Since earliest times, earthen building materials are becoming one of the most known construction techniques in the world thanks to its important benefits. This material has the capacity to play a significant role in regulating moisture and heat in buildings. It is distinguished by its low thermal conductivity, which renders it an effective thermal insulator. Additionally, it exhibits a remarkable ability to facilitate the diffusion of water vapor. In this study, we are interested in the hygric characterization of raw earth material. Generally, in the experiment studies, one test is not representative and is not sufficient to analyze the results and the observed phenomenas. For this reason, a repetitive hygric experimental tests were carried out in this study and the results showing the uncertainties of the measurements will be presented and analyzed to determine the parameters that could cause these uncertainties.