The testing process called moisture mapping evaluates the moisture content of a building. It can help you identify problem areas with moisture intrusion so that you can take steps to address them before they cause serious damage. ### Acceptable Moisture Levels Acceptable moisture levels in a building vary depending on the material being tested. However, as a general rule, the following moisture levels are considered acceptable: - Wood: 12-15% - Gypsum board: 5-10% - Concrete: 2-4% ### What is an Acceptable Damp Reading? Acceptable damp readings are below 20% for wood and below 5% for non-organic materials. Readings above these levels indicate that there is a moisture problem that needs to be addressed. If you are concerned about the moisture levels in your building, it is important to have a moisture map conducted by a qualified professional. A moisture mapping can help you identify problem areas and take steps to address them before they cause serious damage.