Abstract: A system and method for monitoring moisture at a structural component having a membrane for fluid impermeability and a deck for supporting the membrane at a first side of the membrane opposite a second side of the membrane is provided. The system includes: (a) a plurality of sensors spaced apart from each other adjacent to the membrane at the second side, the plurality of sensors including one or more wireless sensors, each of the sensors including a plurality of sensor conductors and a connection member connecting the plurality of sensor conductors to each other while electrically insulating the sensor conductors from each other; and (b) a controller operable to selectively communicate wirelessly with each of the wireless sensors, and operable to selectively determine a sensor output from each of the sensors. The method involves measuring resistance for longterm tracking of pooling of an electrically conductive fluid on the structural component.