COMPARE integriscan vs. efvm INTEGRISCAN™ integriscan vs. efvm Electric Field Vector Mapping (EFVM)
METHOD

New Dual-Sensor Cross Scan Technology (Proprietary)

EFVM is a triangulation-based sampling technology developed in the early 1970’s

TESTING DEVICE

IntegriScan utilizes a mobile platform that isolates a smaller test area for better conductance and more reliable readings.

A perimeter wire is installed to define an isolation area and then probing poles are used to sample the area within the isolation area.

COVERAGE

100% of horizontal, low-slope and vertical surfaces are able to be tested.

Testing is done via sampling, so actual coverage is indeterminate. This method can only visually inspect vertical surfaces.

TEST INVERTED ASSEMBLIES

YES

YES, but due to large isolation area, full conductivity can’t be verified.

TEST CONVENTIONAL ASSEMBLIES

YES, with TruGround on new assemblies and with pre-installed wire mesh.

EFVM may work on conventional assemblies if a wire mesh is properly installed beforehand directly under the membrane, but this approach has other shortcomings.

TEST VERTICAL SURFACES YES NO
TEST TIME FASTEST MODERATE
IMPACT ON CONSTRUCTION SCHEDULE MINIMUM MODERATE
RELIABILITY

Most Accurate

Virtually no chance for false positives or complete misses. Wall junctions, perimeter details, and membrane penetrations are tested electronically.

EFVM has a higher potential for false positives and complete misses. Wall junctions, perimeter details, and membrane penetrations can only be visually inspected.

RCABC ROOFING GUARANTEE PROGRAM APPROVED NOT APPROVED
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