Trace Leaks to the Source Posted February 25, 2015 by ibd2013 IBD can use several non-destructive ways to trace leaks to their source. See below or download Trace Leaks to the Source. Leak source located at vent pipe using infrared . Two leaks located on ballasted EPDM roof using infrared Area of wet insulation as seen from below a metal deck on an EPDM roof. Locating where leak reaches the metal deck using infrared. Active leaks at fasteners on a metal roof using infrared. Leak traced to vent pipe using a capacitance roof moisture meter.