The potential causes of reported roof leaks are numerous but include the following:
In these instances Weatherproofing Advisors offer a number of other surveying services and techniques such as Electronic Leak Detection (or earth leakage testing).
This technique involves setting up an electronic field across the dampened surface of the waterproofing and locating any earthing points using moisture probes.
The earthing points excluding conductive penetrations represent locations where water has penetrated the roof structure and have earthed to the structure beneath i.e. locations where water can enter.
For this method to work effectively, the roof covering itself must not be conductive and the deck beneath must be steel or concrete.
Typically felt, mastic asphalt and single ply PVC roofs can be tested. Metal roofs and single ply EPDM roofs with a high carbon content cannot be tested.
Weatherproofing Advisors as part of their roof management service provide a detailed survey report incorporating a roof plan identifying all defects found supported by photographic summary indexed to the drawing.