Conducting A Moisture Survey:
In Roof Mode
FOR MOISTURE SCANNING AND LEAK TRACING OF BUILT UP
AND SINGLE PLY ROOFING SYSTEMS
Conducting A Roof Survey
1. Switch the RWS ON
2. Select Mode: To select Roof Mode press
MODE switch. When Roof mode is selected the
R
ED LED will light.
3. Select Range: press RANGE switch to toggle
from Low Range (Yellow LED) to High Range
(Red LED) or visa versa.
LOWER PENETRATION RANGE
(Yellow LED inset in range switch will light) is
suitable for use on smooth or mineral surfaced
roofs.
HIGHER PENETRATION RANGE
(Red LED inset in range switch will light) is
more sensitive and will read through heavier
membranes as well as most dry gravel or ballast
roof coverings. (If satisfactory readings cannot
be achieved through ballast, remove same and
work directly on the surface of the waterproof-
ing material).
Procedure
1. Make a sketch of the roof, indicating openings and
protrusions etc.
2. Select a convenient grid span e.g. 6ft (2 meter). On
the North/South perimeter, mark 1,2,3 etc and on
the East/West perimeter mark A, B, C etc. Transfer
these grid system markings to your roof sketch. See
Fig 5 overleaf.
3. Proceed by moving the RWS along the imaginary
line A and mark locations on the sketch graph paper
and / or roof surface when moisture is indicated by
the RWS.
R.W.S.
User Guide
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