## Moisture Mapping
Moisture Mapping is the process of measuring and analyzing the moisture content of wood and other building materials. It is an essential aspect of building science and preservation, as moisture can lead to a variety of problems such as mold growth, rot, and structural damage.
## Wood Moisture Content
The moisture content of wood is expressed as a percentage of its oven-dry weight. The equilibrium moisture content of wood is the moisture content at which it is in equilibrium with the surrounding environment. This equilibrium moisture content varies depending on the type of wood, the temperature, and the relative humidity.
## At What Moisture Content Does Mold Grow on Wood?
Mold can begin to grow on wood at moisture contents as low as 15%. However, the risk of mold growth increases significantly at moisture contents above 20%. Wood with a moisture content of 30% or higher is considered to be at high risk for mold growth.
## Controlling Moisture Content
There are a number of ways to control the moisture content of wood, including:
- Using proper ventilation to keep the air dry
- Installing a vapor barrier to prevent moisture from entering the wood
- Using a dehumidifier to remove moisture from the air
- Sealing cracks and gaps to prevent moisture from entering
## Conclusion
Moisture Mapping is an essential tool for understanding and controlling the moisture content of wood and other building materials. By understanding the moisture content of wood, and by taking steps to control it, we can reduce the risk of mold growth and other moisture-related problems.