Buckleys Wet Roof Pro Application Manual page 7

Method of testing
A suitable point on the structure should be identified as an earth connection for the earth lead of the Dry
Roof Pro'.
Following the instructions in the operating manual of the Dry Roof Pro', the output voltage should be set
according to the calculation made using the formula shown above. The earth lead and test probe
handle should be connected to the Dry Roof Pro' whilst the unit is turned off.
The other end of the earth lead should be attached to the earth connection point of the structure
ensuring that a good electrical contact has been made.
With the Dry Roof Pro' still turned off, extension rods should be connected to the test probe handle. Using
the shoe attachment, a suitable electrode should be attached to the opposite end of the extension rods.
Any electrode used must be in good condition as a damaged one will not make full contact and faults
could be missed.
The operation of the Dry Roof Pro' should be checked by touching the electrode onto the substrate.
The audible alarm should then be activated, but if not, the lead connections should all be checked.
Sometimes it may be necessary to adjust the sensitivity control on the unit. Reducing the setting will
make the unit more sensitive, while increasing the setting will make the unit less sensitive.
The electrode should be passed slowly over the membrane surface at a maximum rate of 100mm per
second, paying attention to edges, holes and irregularities in the coating. The test voltage may need
to be reduced to test the edges as the coating may be thinner.
When a fault is identified by the detector, the electrode should be moved sideways to identify the precise
location of the fault. All faults should be ringed with a suitable marker so that repairs can be carried out
later. The identification of the fault should be far enough away from the defect to allow the repairs to be
made without covering the markings, as the substances contained in some markers can affect the
adhesion of the repair material.
Testing should be continued across the complete surface and all faults marked. Damaged areas should be
re-tested after repairs have been carried out.
Fault in non-conductive
membrane, causing detector
to create a circuit with the
building's structure
triggering the Dry Roof
Pro's alarm.
Non-conductive
roofing membrane
Testing Flat Roof Membranes
Dry Roof Pro's earth
lead connected to
earth on building's
structure
Conductive substrate
(often directly earth-
bonded to building)
Roof structure
7