Ballasted Roof

Trace Leaks to the Source

IBD can use several non-destructive ways to trace leaks to their source.  See below or download Trace Leaks to the Source.

 

IR_90841a
Leak source located at vent pipe using infrared .
IR_93262
Two leaks located on ballasted EPDM roof using infrared
IR_0222a
Area of wet insulation as seen from below a metal deck on an EPDM roof.
IR_0102a
Locating where leak reaches the metal deck using infrared.
Under_Metal_03
Active leaks at fasteners on a metal roof using infrared.
IMG_1047
Leak traced to vent pipe using a capacitance roof moisture meter.

 

Thermography Brief – Moisture in Ballasted Roofs

Infrared thermography can be used to locate wet insulation in a ballasted single-ply roof system. The ballast stone does increase the challenge and may require waiting longer after sunset to start an inspection. A higher vantage point can help to pinpoint areas for closer inspection. The standards call for a large inside/outside temperature difference, but this is not always necessary. The main condition is that the ballast stone is spread evenly and has a uniform depth.


Ballasted_04

The wet area is around the vent and extends diagonal toward the lower left of the thermogram. See next image for a more defined view from above.  Ballasted EPDM / EPS insulation / concrete deck. Outside temperature was 73F+/-.


Ballasted_05

The above image shows the same wet area of the first image, but taken from a the vantage point of a higher roof level.  Ballasted EPDM / EPS insulation / concrete deck. Outside temperature was 73F+/-.


Ballasted_06

EPS insulation wets (absorbs moisture) very slowly and a small wet area like this one only 1-2 feet wide will appear amorphous.  Ballasted EPDM / EPS insulation / concrete deck. Outside temperature was 73F+/-.


Ballasted_07

A distinct board pattern extending from below a raised walkway on the right side. Ballasted EPDM / Polyisocyanurate insulation. Outside temperature was 34F+/-.

Download the PDF version of this Thermography Brief.