The average moisture content of kiln-dried lumber is?

Kiln-dried lumber typically has a moisture content that is lower than 19%. This process of drying wood in a kiln is designed to remove excess moisture, resulting in a stable, well-dried product that minimizes issues such as warping, cracking, and mold growth once the lumber is used in construction or crafting.

The average moisture content being 19% or less indicates that the wood is suitable for many applications, especially in interior environments where humidity levels are controlled. A moisture content at or below this percentage is considered optimal for ensuring the durability and performance of the lumber.

In contrast, moisture contents of 19% or more would suggest that the wood is not adequately dried for most structural purposes and is likely to suffer from dimensional changes as it acclimates to its environment. Moisture content of 10% or less signifies very dry wood, which is ideal for certain applications but may be too low for areas with variable humidity if not adjusted correctly. Hence, the average moisture content of kiln-dried lumber aligns best with being 19% or less.