International Leak Detection Electric Field Vector Mapping (EFVM) method

International Leak Detection (ILD) provides roofing and waterproofing integrity testing with its Electric Field Vector Mapping (EFVM) testing method. The leak detection method is based on the measurement of the current flow between a non-conductive membrane surface and a conductive substrate eg, a concrete rooftop, balconies, planter box etc which is earthed or grounded.

A thin film of water is applied to the surface to be tested and subjected to low voltage. The current flows towards the leak to exit at the earthed substructure/conductive substrate. This information allows the company’s measurement technicians to precisely detect all respective leaks, regardless of size, at time of membrane installation or within existing structures.

ILD is also able to detect breaches/leaks within membranes used on green roofs, car parks, planter boxes and through tiled/paved surfaces. The company’s technology eliminates the need to remove tiles, pavers etc from the area, as ILD can test right through them with pinpoint accuracy.