Buckleys Wet Roof Pro Application Manual page 4

Application Guide
Testing Wet Roof Surfaces
The Wet Roof Pro' has been designed to locate leaks on flat roofing systems which incorporate
dielectric membrane overlays such as single-ply, asphalt, bitumen and liquid applied roofs.
The Wet Roof Pro' uses the conductive properties of water (from either rainfall or a hose) to pinpoint leaks.
The kit comprises two main elements; a
generator unit and a detector unit. The
generator unit creates an electrical field
across the roof surface via a 'boundary
wire' which is positioned around the
perimeter of the test area and connected
to the positive terminal on the generator
unit. The negative terminal is connected to
a suitable earth on the building's structure.
Leaks in the roof membrane allow water to
penetrate to the building's structure; creating a
short circuit. The detector unit is connected
to two hand-held test probes which are held in
contact with the roof surface.
By measuring the voltage differential between the test probes, the detector unit is able to direct
the operator to the location of the leak.
Principle of operation
The generator of the Wet Roof Leak
Detector delivers a stabilised low
frequency pulse. The negative output of
the generator is applied to the trace
wire which borders the test area, whilst
the positive output is connected to a
suitable building substrate. If moisture has
penetrated the membrane or coating of
the roof within the test area, a current
will flow from this source point, via the
moisture on the roof towards the trace
wire. The detector is used to identify the
direction of electrical current and detect
the point of origin (ie where moisture is
penetrating the roof covering).
The generator is powered by
rechargeable batteries which are
included in the kit, along with a charger.
Both units feature automatic shut-down
when left unused for a prolonged period
of time.
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