Fecha de publicación: -- Fuente: Materials Monitoring indoor environmental quality in buildings remains complex, and there is no systematic methodology. Instrumentation in cob and light earth buildings, mixtures of earth, water, and plant elements, appears even more complex due to their properties and their interactions with the surrounding environment, which can affect pollutant concentrations. While sensor deployment strategies sometimes address spatial variability, few studies offer specific recommendations adapted to earth constructions to assess indoor air quality. This study proposes a sensor deployment methodology for an earthen building to evaluate the reliability of the sensor network. The experimental facility consists of a cob and light earth building prototype in Normandy, France. The latter is instrumented with sensors to track indoor and/or outdoor air and wall-surface temperatures, relative humidity, air velocity, and concentrations of CO2, particulate matter (PM1, PM2.5, PM10), carbon monoxide, and formaldehyde, with and without occupancy. Preliminary results on PM10 and CO2 concentrations during both occupied and unoccupied periods show consistent and promising trends. They highlight the ability of the developed setup to provide reliable data for dynamic simulations and, ultimately, for the development of a dedicated tool to optimise the use of earth materials for indoor air quality (IAQ) improvement.