Moisture mapping is a technique used to detect and measure moisture content within building materials, including internal walls. Acceptable moisture levels in these areas are crucial to ensure structural integrity, occupant health, and overall building longevity. **Acceptable Moisture Levels** Internal walls should generally maintain a moisture content below 15%. Higher levels of moisture can lead to several issues, including: * Mold growth * Rot and decay * Structural damage * Poor indoor air quality **What Should Moisture Readings Be for Internal Walls?** Acceptable moisture readings for internal walls vary depending on the building materials used. Here are some general guidelines: * **Gypsum board:** 6-12% * **Plaster:** 8-12% * **Concrete:** 3-7% **Monitoring Moisture Levels** It is advisable to monitor moisture levels periodically, especially after events such as floods or leaks. This can be done using moisture meters or moisture mapping equipment. If moisture levels exceed the acceptable range, it is essential to address the underlying cause and implement remediation measures. **Conclusion** Maintaining acceptable moisture levels in internal walls is vital for the health and safety of building occupants. By understanding the appropriate moisture readings and monitoring levels regularly, building owners can prevent moisture-related issues and ensure the longevity of their properties.