Operator view of the PHS app: This diagram depicts the current status of the CTP roof of kbprintcom.at Druck + Kommunikation GmbH on a daily basis. The monitoring period may be customised via the app. The humidity curve is measured, recorded and in case of excess humidity or water leaks an alert is triggered. Based on the installation scheme, any occurring leaks or high humidity levels can be quickly located. Our app provides end users with a traffic light rating system which allows them to assess the status of their building at a glance.