Moisture mapping is a process used to identify and locate areas of moisture intrusion within a structure. This can be done through a variety of methods, each with its own advantages and disadvantages. ### Moisture Mapping and Detection Methods The most common method of moisture mapping is through the use of a moisture meter. Moisture meters measure the electrical resistance of a material, which can be used to estimate the moisture content. Moisture meters are relatively inexpensive and easy to use, making them a good option for homeowners and do-it-yourselfers. Another method of moisture mapping is through the use of infrared thermography. Infrared thermography uses a special camera to detect changes in temperature, which can be used to identify areas of moisture intrusion. Infrared thermography is a non-invasive method that can be used to quickly survey large areas, making it a good option for commercial buildings and other large structures. ### How to do a Moisture Test on Walls? To perform a moisture test on walls, you will need a moisture meter. Moisture meters can be purchased at most hardware stores. 1. Start by removing any furniture or other objects from the area where you will be testing. 2. Turn on the moisture meter and adjust it to the correct setting for the material you will be testing. 3. Place the moisture meter against the wall and hold it in place for a few seconds. 4. Read the moisture content reading on the meter. A moisture content reading of 0% indicates that the wall is dry. A moisture content reading of 10% or more indicates that the wall is wet and may need to be repaired.