Which drying method places the stacks of sawn timber in the open or in large sheds with little control over the drying process?

• A. Drying in a kiln
• B. Air-drying alternatives
• C. Sun drying
• D. Air-drying

Answer: (D)

Drying by air-drying means letting the timber lose its moisture in ambient conditions, without applying heat or tightly regulating temperature and humidity. The stacks are placed in the open air or in large sheds where environmental factors largely govern the process, so moisture leaves the wood slowly and unevenly over a long period. This aligns with the description in the question because it emphasizes little control over the drying, relying on natural conditions rather than a controlled kiln or tightly managed environment. Compared to kiln drying, which uses heat and airflow under precise settings to speed up and standardize the moisture content, air-drying is slower and more variable, but it’s cost-effective and simple. Sun drying is a form of air-drying that uses direct sunlight, but the broader term air-drying captures the general method of drying with minimal intervention.