### Wood Moisture Content Wood moisture content (MC) refers to the amount of moisture present in wood as a percentage of its dry weight. Proper moisture content is crucial for maintaining wood's stability and preventing damage. ### At What Moisture Content Does Mold Grow on Wood? Mold growth on wood is a common concern, particularly in humid environments. Mold spores are always present in the air, but they require specific conditions to germinate and grow. One of these conditions is adequate moisture. **Mold growth on wood typically occurs when the moisture content exceeds 20%**. Excessive moisture weakens the wood's structural integrity and provides a suitable environment for mold to thrive. It is important to monitor wood moisture levels and take steps to control moisture if necessary. ### Moisture Mapping Techniques Moisture mapping is a valuable tool for assessing wood moisture content distribution within a structure or building. It involves using specialized moisture meters to measure the moisture content of wood surfaces and substructures. Moisture mapping can be performed using various techniques, including: - **Surface moisture mapping:** Measures the moisture content of wood surfaces. - **Probe moisture mapping:** Uses small probes to measure moisture content below the surface. - **Thermal imaging:** Utilizes infrared cameras to detect temperature differences caused by moisture variations. Moisture mapping is beneficial for: - Identifying areas with excessive moisture. - Assessing the extent of moisture damage. - Developing targeted moisture remediation strategies. By understanding wood moisture content and the role it plays in mold growth, you can implement effective moisture control measures and prevent costly damage to your property.