Moisture content above 16% is measured as wet. Most of the indicators are now quite accurate, even the cheapest ones.
In general, a safe moisture content ( MC) for Paris plaster would be less than 1 MC. Anything above 1% MC in the plaster indicates a level of humidity that can compromise the integrity of the drywall. Exterior walls can use a variety of materials, from wood siding to vinyl, aluminum, brick and stone.
A good quality moisture meter used on the correct material can be accurate to less than 0.1% of the moisture content of the material. However, a low-end moisture meter can be very inaccurate.
Moisture readings in wood typically cover a scale of up to 0 40% (average softwood is saturated 28% to 32%) and moisture readings in masonry (brick, stone, plaster, concrete) generally go up at 0 5%.
How PinType Moisture Meters Work. Pin moisture meters work by measuring the electrical resistance between two electrodes. If there is moisture in the wood, it will flow more easily. This resistance is measured in ohms and then converted into a reading expressed in X% humidity.
Sometimes moisture or moisture (water vapor) in the air can provide enough moisture for mold growth. Indoor relative humidity (RH) should be kept below 60 percent, preferably between 30 and 50 percent if possible. Low humidity can also prevent pests (such as ■■■■■■■■■■■■ and mites.
It is important to maintain the correct humidity in the home and workplace to maintain a comfortable and healthy space. Indoor humidity should be between 30 and 50 percent, ideally around 45 percent.
6 to 12 months
In the colder months, homes are prone to condensation problems. A large temperature difference between the outside air and the air inside the house favors the formation of condensation on surfaces such as walls and windows. This excessive condensation can cause damp walls, mold growth and plaster stains.
Here are some common signs of moisture in a home:
To use this procedure, ASTM D 4263, Standard Test Method for Indicating Moisture in Concrete Using the plastic sheet method, a plastic sheet is firmly attached to the concrete. After 72 hours, measure the moisture under the plastic with a dew point hygrometer.
A range of 5 to 12% is considered optimal. A reading up to 17% is generally considered moderate and acceptable humidity. Any reading above 17% is indicative of saturation and the need to replace the patch and take preventive measures against future fluid build-up.
In difficult conditions, you can see higher values for 22% skirts, 1% 3% plaster and 2% 5% brick. Measurements are made on a reference scale, as it is only relative humidity. The wood moisture scale (WME equivalent of wood moisture) is the most common and recognized by professional associations.
Rising Vapor Sign
Measuring relative humidity (RH) and temperatures in a number of rooms and outdoors with a sampling period of half an hour can be an effective method for diagnosing humidity. Thermography is used to accurately capture the temperature of building materials and isolate areas near or below the dew point.
So here’s my list of the 10 best moisture meters.
Penless Moisture Meter