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User Instructions for Lignometer K
Moisture Meter
Lignometer K:
The Lignometer K is used by professionals in many different fields, from timber
processing to furniture making to hardwood flooring installation, inspection,
construction and restoration.
For the floor installer:
Throughout the installation process a floor installer
should use a moisture meter. First, when the floor
is delivered, to make sure the floor is dry. Next,
before and after acclimation, to make sure the floor
is acclimated to the ambient conditions at the place
of installation. It is best to mark selected sample
boards and take readings throughout the
acclimation process until the moisture content of the
wood matches the relative humidity.
(See EMC chart below.)
After the installation is finished and the customer
is ready to sign off on the floor, the moisture
condition of the floor should be documented. Select
several moisture sensitive areas. Maybe even take a
photo to pinpoint the location.
If you ever have to go back to check out a complaint, you can measure the same areas
again and compare with the original readings. Keeping track of moisture conditions may
in the end protect you from unwarranted claims and help find the source of the problem.
Relative Humidity
Temp 15 20 25 30 35 40 45 50 55 60 65 70 75
40 3.7 4.6 5.5 6.3 7.1 7.8 8.7 9.5 10.4 11.3 12.4 13.5 14.9
50 3.6 4.6 5.5 6.3 7.1 7.9 8.7 9.5 10.3 11.2 12.3 13.4 14.8
60 3.6 4.6 5.4 6.2 7.0 7.8 8.6 9.4 10.2 11.1 12.1 13.3 14.6
70 3.5 4.5 5.4 6.2 6.9 7.7 8.5 9.2 10.1 11.0 12.0 13.1 14.4
80 3.5 4.5 5.4 6.2 6.9 7.7 8.5 9.2 10.1 11.0 12.0 13.1 14.4
90 3.4 4.3 5.1 5.9 6.7 7.4 8.1 8.9 9.7 10.5 11.5 12.6 13.9
100 3.3 4.2 5.0 5.8 6.5 7.2 7.9 8.7 9.5 10.3 11.2 12.3 13.6
For example: When a dry floor with the perfect moisture content of 6.2% is exposed for
a long time to air with a relative humidity of 60%, the wood will absorb moisture and
expand until 11% has been reached. Depending on wood species, the 5% change in moisture
content can be accompanied by a substantial amount of expansion.
