Are leaks under a conventional green roof a problem?
Surprisingly, leaks in the waterproofing layer are less likely when it is protected from the elements by a green roof. If a leak does occur, it can readily be located through new electronic technology, such as electric field vector mapping (EFVM), which can rapidly and accurately pinpoint even minute holes. This system is more reliable than the older flood testing method; need not be installed in advance, and can even be used on steeply-sloped surfaces. Repairs to the waterproofing are quick, and disturbance of the green roof is minimal.