WORKING WITH YOUR MOISTURE ENCOUNTER:
Scale 2
Testing built-up roofing
a. The presence of moisture in built-up roofs
covered with multi-ply roofing felt, PVC, modified
bitumen (torch-on) or other membranes, can cause
blistering and splitting of the roof surfacing. In
addition moisture can cause considerable damage
to the contents and fabric of the building as well
as heat loss through wet insulation. Your Moisture
Encounter Plus can be used to confirm a new roof
has been installed dry.
b. When the waterproofing membrane develops a
leak, the water can travel within the built-up-roof
structure and enter the building some distance
away. Testing the membrane surface and compar-
ing the dry areas with areas where moisture is
present below the surface can assist in tracing
such a leak to its source.
c. As there are many different types and thickness
sizes of roofing membranes, it is not possible
to give a calibrated percentage measurement.
Instead, the comparative scale, marked 0 to 100,
is used for checking the difference between wet
and dry.
16
MEP USER GUIDE
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