Solution for flat roofs – SENSOR DDS® technology
The most used and effective way of testing the liner integrity on green roofs is to survey using SENSOR DDS® technology. As the technology is based on the distribution of geoelectrical field below and above the liner the problem could be presence of the thermo-isolation which is non-conductive.
For that reason Sensor has developed the Sensor leak detection geotextile which is installed below the PVC, TPO, bituminous or other non-conductive geomembrane. It is a direct replacement of standard geotextile so no additional installation is needed.
Sensor leak detection geotextile is installed as standard geotextile with an overlap of minimum 100mm. After installation of the geomembrane we can now test its integrity using the SENSOR DDS® MIT portable Arc Testing device. In this step we eliminate every pinhole found in flat area or corners.
For the next step a drainage gravel layer was carefully installed on top of the tested roof liner. The final test of geomembrane integrity was completed using our SENSOR DDS® Mobile dipole testing kit which identified small damage caused by sharp stones when placing the overliner.
Where permanent 24/7 monitoring of the roof waterproofing is required we install our SENSOR DDS® RFM system. This sophisticated Sensor system consists of buried components called Sensor tiles which divide the monitoring area into sectors. Each sector is monitored permanently in real time that can be seen on the touch screen of control panel inside the building.
In the event of a leak, our system automatically triggers an alarm and informs the client via SMS/Email. The identified sector is displayed also on the Sensor control panel’s screen. Precise localisation of the leak within the detected sector is made using Sensor’s dipole system SENSOR DDS® Mobile or SENSOR DDS® MIT Arc Tester.