12
Moisture Encounter Plus
User Guide
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 comparing 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.
d) If gravel surfacing is present, this should be removed to
ensure your Moisture Encounter Plus comes into direct
contact with the surface of the membrane.
e) It is recommended that a core be cut to determine the depth
and density of the moisture before carrying out roof repairs.
Alternatively, the area can be checked with a Tramex
Compact or Professional resistance type moisture meter with
insulated pins.
Testing Drywall.
Because of its deep signal penetration, your Moisture Encounter
Plus can identify excess moisture behind drywall, ceramic tile
and other wall coverings when used on Scale 2. As calibration is
not practical on this type of construction, readings should be
taken from the comparative scale (0 to 100) on the meter dial.
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