Moisture mapping is a crucial aspect of wood preservation, ensuring that wood is properly treated and maintained to prevent moisture-related damage, such as mold growth. Understanding the relationship between wood moisture content and mold growth is essential for effective moisture management.

Wood Moisture Content

Wood moisture content (MC) refers to the amount of water present in the wood, expressed as a percentage of its dry weight. Wood moisture content can vary significantly depending on environmental factors such as temperature, humidity, and exposure to moisture.

• High MC: Wood with high MC (above 20%) is more susceptible to mold growth, decay, and rot.
• Low MC: Wood with low MC (below 12%) is less likely to support mold growth, but can become brittle and prone to cracking.

At What Moisture Content Does Mold Grow on Wood?

Mold growth on wood is typically initiated when the MC exceeds 20%. As MC increases, the availability of moisture for mold growth increases, creating a favorable environment for mold spores to germinate and colonize. Mold growth can lead to surface discoloration, structural damage, and health concerns.

Maintaining wood MC below 20% is essential for preventing mold growth and ensuring the longevity and integrity of wooden structures.