CONCRETE MOISTURE ENCOUNTER X5 USER GUIDE
17
Testing for moisture content in a floor slab
Pre-test conditioning and preparation
For best and most accurate results, final tests should
be carried out after the internal conditions of the
building in which the slab is located have been at normal
service temperature and humidity for at least 48 hours.
All artificial heating or drying equipment should be
turned off at least 96 hours before final readings are
attempted, otherwise results may not accurately reflect
the amount of moisture present or moisture movement
in the slab during normal operating conditions. If being
used for the final test while artifical heating or drying
equipment is on, the readings should only be considered
as an indicative guideline for monitoring purposes, and
not as the final test. Prior to testing, the actual test area
should be clean and free of foreign substances.
Pre-testing guidelines
Where covered floor slabs are being tested, all covering
materials, adhesive residue, curing compounds, sealers,
paints, etc., shall be removed to expose a test area of
clean bare concrete. For removal of any existing flooring
or adhesives, strictly observe all the appropriate safety
and health practices relevant to cleaning and removal of
these types of materials. Removal of covering materials
and cleaning, if required, should take place a minimum of
48 hours prior to testing. Use of water based cleaning
methods that could lead to elevated surface and/or
sub-surface moisture levels in the floor slab are not
recommended, and the testing after such treatment
could result in elevated readings. No visible water in
liquid form should be present on the concrete at the time
of testing. Avoid testing in locations subject to direct
sunlight or sources of heat.
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