Moisture Mapping Understanding Wood Moisture Content and Preferred Levels for Treatment

Understanding Wood Moisture Content

The moisture content of wood plays a critical role in its stability and durability. It is generally expressed as a percentage of the wood’s weight and indicates the amount of water present. When wood is exposed to moisture, it absorbs water, causing it to swell. Conversely, when wood loses moisture, it shrinks. This process of expansion and contraction can lead to warping, cracking, and other damage over time.

Preferred Moisture Content for Treating Wood

The preferred moisture content for treating wood depends on the treatment method being used. Here are the ideal moisture levels for different treatment types:

• Pressure Treatment: Wood should be seasoned or kiln-dried to a moisture content of 19% or less before pressure treatment.
• Chemical Treatment: Wood should be seasoned or kiln-dried to a moisture content of 15% or less before chemical treatment.
• Heat Treatment: Wood should be seasoned or kiln-dried to a moisture content of 5% or less before heat treatment.

Maintaining the proper moisture content is essential for effective treatment absorption and protection against wood decay and damage.