Wood Moisture Content

The moisture content of wood is a crucial factor influencing its properties and performance. It represents the amount of water present within the wood fibers and is typically expressed as a percentage of the oven-dry weight. Understanding wood moisture content is essential for various applications, including construction, woodworking, and moisture management.

Can Wood Contain Over 100% Moisture Content?

Contrary to common belief, wood can indeed contain moisture content exceeding 100%. This phenomenon occurs during the process known as “bound water.” When wood is submerged in water, it absorbs moisture and swells. The water trapped within the wood’s cellular walls is strongly bound to the wood fibers, forming bound water. This bound water is tightly held and cannot be easily removed through evaporation or drying.

The percentage of bound water in wood varies depending on the species and the environmental conditions. Some wood species, such as oak and maple, are known for their high bound water content, which can exceed 100% under certain conditions.

The presence of over 100% moisture content in wood has significant implications. It can affect the wood’s dimensional stability, mechanical strength, and decay resistance. High moisture content can also promote the growth of fungi and mold, leading to wood deterioration.