| COMPARE |  
IntegriScan |
Electric Field Vector Mapping (EFVM™) |
|---|---|---|
| METHOD |
Advanced dual sensor cross scan technology developed in the USA in the early 2000’s. |
Vector Mapping is a triangulation-based sampling technology developed in Germany in the early 1970’s. This method was originally created for testing pond liners and was then adapted for the roofing/waterproofing industry. |
| TESTING DEVICE |
IntegriScan utilizes a mobile platform that isolates a small test area for better conductance and more reliable readings. A roller apparatus is used for verticals. |
A perimeter wire is installed to define an isolation area and then probing poles are used to sample the area within the isolation area. The results rely heavily on the technician’s experience and amount of water utilized. |
| COVERAGE |
The scanning platform and vertical roller are used in conjunction to test horizontals, verticals, transitions and details. |
Testing can only be performed within the areas isolated by the perimeter wire. Vector mapping CAN NOT test transitions and details, and can not reliably test verticals. |
| TEST INVERTED ASSEMBLIES |
YES, no limitations! |
YES, within the perimeter wire isolation area. |
| TEST CONVENTIONAL ASSEMBLIES |
YES, with TruGround® on new roof assemblies. Locating an active leak in an existing building requires water saturation from the surface of the membrane to a concrete or metal deck. |
In new construction, vector mapping will work with a conductive medium placed directly under the membrane on conventional assemblies. Note – the vector mapping grid (aka VMG) is often not approved for proper placement directly below the membrane. Placement below the coverboard or insulation blocks the electrical path resulting in an invalid/inconclusive test. |
| TEST BLACK EPDM | YES – ONLY the IntegriScan equipment by Detec Systems can test black EPDM and semi conductive cold fluid applied waterproofings. Currently, the scanning platform is the only method that can test semi conductive membranes. Detec has invented a vertical apparatus for conductive membranes which is the next technical advancement in ELD. | NO – Vector mapping can only test non conductive membranes. |
| TEST VERTICAL SURFACES | YES – A roller apparatus is used for testing vertical surfaces. | Vector mapping is not feasible for testing vertical surfaces, and is not something supported by all vector mapping equipment manufacturers or testing agencies. |
| SQUARE FOOTAGE PER DAY | Up to 20,000 sq ft/day for horizontals and up to 10,000 sq ft/day for verticals. | Vector mapping may be able to test up to 20,000 sq ft/day. This method requires set up prior to testing. Set up time varies depending on the square footage, number of areas to test, and the number of penetrations. |
| RELIABILITY |
Virtually no chance for false positives or complete misses. Wall junctions, perimeter details, and membrane penetrations are tested using the vertical roller or glove. |
Vector Mapping has a high potential for false positives and complete misses. Breaches close in proximity can get missed. Wall junctions, perimeter details, and membrane penetrations can only be visually inspected. |
| FM APPROVED |
YES – The only ELD method that is FM approved (FM Approvals 7745) |
Vector Mapping is not an FM approved testing method |
