Wall Moisture Meter Readings

Care must be taken interpreting the readings when using these types of meters contaminants within plasterwork can be electrically conductive. The unit provides a moisture level range of 5 percent to 50 percent in wood and 1 5 percent to 33 percent in building materials and offers an audible indication of moisture level and storage of moisture level readings. The speedy chemical moisture meter gives a quantitative reading of the total moisture content in masonry.

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I have seen drywall in a garage show 15 with a pin type meter on a hot summer day with high rh and the high reading was due to the high humidity and nothing more.

Wall moisture meter readings.

When used on the timber the readings recorded are moisture content relative. Other types of meters are available from ones that use electromagnetic waves to detect moisture under the wall. In the wood scale the meter can detect moisture accurately over a range of 6 mc to 40 mc. One meter might have a reference mode setting that displays moisture values from 0 300 while the other one goes from 0 100.

Calibrate the moisture meter according to instructions before testing your wall. Some meters use a 0 300 reference scale so readings taken on a reference scale often do not. While it might be tempting to think of readings on the 0 100 reference scale meter as percent values they are not. The moisture levels of drywall are very dependent on the rh relative humidity in the area.

In many cases a moisture meter s reference scale will range from 0 100 but that reading should not be confused with a percentage. The readings obtained using these meters cannot be relied upon on their own to diagnose rising and penetrating damp. Moisture meters are used to measure the percentage of water in a given piece of wood and are most useful when the percentage of moisture ranges from 5 to no more than 30. The bd 2100 s drywall moisture meter readings are accurate in gypsum to moisture content percentages as low as 0 2 and as high as 50.

When the moisture content is around 30 wood reaches its fiber saturation point or fsp. If there are quite small amounts of moisture in a wall of dense plaster or brick then a meter will probably indicate over 20 or so and this will be in the red zone or beeps and squeeks may happen. Moisture meter testing showed readings in excess of 40 wme wood moisture equivalent to the porous plaster on walls. As readings exceed 20 wme remedial works are deemed necessary to this area.

Moisture meter readings i would say that 6 is fairly normal in an occupied home. For example say you have two different moisture meters.