EFVM® Leak Detection System from International Leak Detection

Electric Field Vector Mapping®

Now available in Australia, the EFVM® leak detection system makes flood testing of waterproofing membranes a thing of the past.

Initially introduced to the United States market in 2001, the EFVM® System is now used extensively around the world. Waterproofing membrane defects can occur during or after installation; e.g. mechanical damage caused by others, workmanship defects, material defects, design faults, weather related defects or membrane deterioration.

EFVM® provides an efficient and highly accurate leak detection solution.

What is EFVM

EFVM® is a low voltage test method that creates an electrical potential difference between a nonconductive membrane surface and a conductive substrate, which is earthed or grounded.

By applying water on the membrane surface and using the water as a conductive medium, an electric field is created and a breach in the membrane creates a vector (ground fault connection). The EFVM® technician reads the electric flow travelling across the membrane, mapping the breaches with pin point accuracy.

Advantages of the EFVM testing system

Accurate pinpointing of membrane breaches
Non-destructive to the membrane
Can be performed on sloped structural decks
Eliminates removal of the overburden to locate a membrane breach
Membrane performance can be monitored during its lifespan through the overburden
Membrane defects can be repaired and retested without delay to the construction schedule
Limited use of water required for the EFVM® test
EFVM® can be performed during inclement weather
Overburden installation can proceed immediately after or during the EFVM® test.