Moisture Mapping Understanding Wood Moisture Content and Mold Growth

Moisture Mapping is a crucial process for maintaining the integrity and durability of wooden structures. Wood moisture content, or the amount of moisture present within the wood, significantly influences its physical and mechanical properties.

Wood Moisture Content

Wood moisture content (WMC) is measured as a percentage of the oven-dry weight of the wood. It is essential to control WMC within specific limits to prevent structural problems and decay.

  • Green wood: WMC above 30%
  • Air-dry wood: WMC between 12-15%
  • Kiln-dry wood: WMC below 8%

At What Moisture Content Does Mold Grow on Wood?

Mold, a type of fungus, is a major concern for wooden structures. It thrives in moist environments and can cause significant damage to wood. Mold growth on wood typically occurs when:

  • WMC exceeds 20%
  • The relative humidity exceeds 70%
  • There is a lack of ventilation and air circulation

To prevent mold growth, it is crucial to maintain WMC below 20% and control relative humidity levels. Moisture Mapping techniques can be employed to accurately assess and track WMC and identify areas where moisture accumulation or mold growth is a risk.