We aim to incorporate sensor-monitoring technology into housing so that residents can use it to maintain their buildings and improve living conditions. In this study, we propose a diagnostic technology that prevents the early deterioration of structural members of buildings by monitoring moisture movement inside them. Those experiments were conducted to test a diagnostic technology that can detect the physical deterioration of building components early on by using a wetting monitoring system installed on the reinforced concrete external wall. As a result, we could construct a wetting monitoring system in the building．
