by Chris Eichhorn, International Leak Detection & Charlie Miller, Roofscapes Inc.
Electric field vector mapping (EFVM*), a new and powerful tool for improving quality control of waterproofing systems, is now available. Although this method is unfamiliar
to most Americans, it has already achieved a long record of success in Europe.
Unlike most other leak detection methods, it can quickly and accurately locate the point
of water entry. Another unique aspect of this technique is that a pinhole (too small to find visually) is as easy to locate as a large tear or failed seam. Alternative approaches, such
as infrared surveys, can determine where water has accumulated in the insulation, but may
not be as useful in actually finding the waterproofing defect.
