Method to detect and locate a breach in vertical or horizontal intersections in a membrane of a roof
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United States of America Patent
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Dec 7, 2010
Issued Date -
N/A
app pub date -
Feb 13, 2008
filing date -
Feb 13, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
A defect in a horizontal or vertical seam at the edge of a roof membrane is detected by applying a DC voltage between the roof deck a probe in the form of a flexible wetted sponge and wiping the sponge probe over the seams. The current to the probe is detected and indicated to the operator so that the operator may determine a maximum current at the defect. The receiver provides an audible signal emitter to the operator and includes a calibration circuit arranged to automatically maintain, despite changes in voltage applied between the roof deck and the peripheral conductor, a “0” set calibration point so as to indicate at the calibration point when zero difference in voltage is detected. Conductors can be applied to the membrane to define an area to be tested within the conductors.
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