Gaussan Leak Sentry is an important addition to new and existing roofs that have insulation below the primary membrane, and which can have a vapor retarder on the deck. The system has smart sensors which are designed to measure if any water/moisture is getting inside the roofing envelope and to constantly transmit this data to the monitoring system for analysis. If the roofing envelope experiences moisture intrusion from whatever source and the rate of change in the water vapor in the envelope increases to a predetermined level, the system triggers an alarm. The roof data is processed and monitored by a state of the art, secure, cloud based micro-service architecture. This means that roof data can be consumed in real time with little to no delay and advanced analytics can be brought to bear on the data which will eliminate the false alarm “noise” that other systems might pick up. The advanced analytics utilizes a control period spanning months to train a model which consists of weather data and roof configuration to look for changes in readings driven by one of those factors. The quantity and configuration of Gaussan Leak Sentry sensors determine the area of the roof where leakage is occurring and the amount of resolution to determine where the leak may be coming from.