Moisture Mapping is a non-invasive technique that provides accurate readings of moisture content in building materials. It is used to detect and diagnose moisture-related issues that can lead to structural damage, mold growth, and health problems. ### What should moisture readings be for internal walls? Acceptable moisture levels vary depending on the type of material used in the construction of internal walls. However, generally: * Gypsum board walls: Less than 10% moisture content is considered acceptable. * Plasterboard walls: Less than 12% moisture content is considered acceptable. * Brick walls: Less than 15% moisture content is considered acceptable. * Concrete walls: Less than 18% moisture content is considered acceptable. It is important to note that these values are only guidelines, and the actual acceptable moisture levels may vary depending on factors such as climate, ventilation, and usage patterns. If moisture levels in internal walls exceed these acceptable levels, it may indicate a moisture problem that requires attention. This could be due to leaks, condensation, or other factors. It is recommended to consult with a professional moisture mapping expert who can identify the source of the moisture and recommend appropriate remediation measures.