Kiln drying uses controlled temperature, humidity, and airflow to reduce lumber’s moisture content. Lumber is stacked with spacers to allow air circulation.

Depending on the species, dimensions, and target moisture content, some softwood lumber can be dried in just 1–2 days at temperatures above 100°C.

Compared with green lumber, KD lumber is generally lighter and more dimensionally stable, helping reduce shrinkage, warping, and the risk of mold during storage and shipping, particularly in enclosed export containers.

Lumber can be purchased kiln-dried from sawmills, or purchased green and custom-dried to meet specific moisture requirements.