This technology is also phrased (EVM) Electronic Field Vector Mapping or Voltage Gradient Mapping and Wet Roof Leak Detection. A form of (ELD) Electronic leak Detection, this method utilizes the conductive property of water to help the operator locate the origin of a leak.
Why Choose ELD and Electronic Field Vector Mapping
There are so many reasons why Electronic Leak Detection testing of roof membranes is so important and becoming the most popular forms of testing throughout the United States and the rest of the world.
Engineers, architects, specifiers, contractors, manufacturers, developers and property owners are all turning to Electronic Leak Detection in order to locate leaks in waterproof membranes. Utilizing both the High Voltage testing (ELD) and Electronic Field Vector Mapping (Low Voltage or Wet Method) takes a fraction of the time of traditional flood testing to locate breaches and leaks in both new roof construction as well as existing waterproofing membranes.
During and after the construction process, there are many ways the waterproof membrane can be compromised. Most of the time, these breaches that are created are invisible to the naked eye. It can sometimes take weeks, months or even years to experience the leak and the incredible damage it causes.
By conducting both the High Voltage and/or Low Voltage testing, these leaks in the roof’s waterproof membrane can be detected before the damage is done.
How Does Low Voltage, Electronic Field Vector Mapping Work?
Electronic Field Vector Mapping pinpoints holes, breaches and leaks through a waterproofing membrane by creating a positive and negative electrical current over and under the non-conductive waterproofing membrane. If there are any penetrations in the waterproofing, current will flow through the membrane and the exact location will be detected with Atlantic’s testing equipment.
Electronic Field Vector Mapping requires a small amount of water to be in and on the surface of the roof in order to allow current flow. A boundary wire is installed around the perimeter of the area to be tested. All conductive roof drains or other elements are screened off. To perform the test, the negative side of the impulse generator is connected to the boundary wire and the positive side to a conductive layer under the waterproofing, which can be the roof deck itself. As the current finds its way to a hole in the membrane, the technology pinpoints that exact location.
Benefits of Low Voltage, Electronic Field Vector Mapping
There are thousands of roofs in which the construction, overburden, and amenities are already in place and are experiencing leaks. The benefits to Electronic Leak Detection of these existing roof waterproof membranes is that the testing can be done with everything in place and without the need to disturb the existing roof space.
Utilizing the Low Voltage, Electronic Field Vector Mapping method can accurately pinpoint these leaks regardless of the space that has been created on these existing roofs. The benefit of this method is an incredible savings in both time and cost. The test procedure is safe, cost effective and efficient. By eliminating the old flood test method, electronic testing reduces the possibilities of trapping water under the membrane leading to both wet insulation and mold growth while accurately locating the leak. If you would like further information or to schedule our leak detection services, please call us, email us or fill out a contact form today.