What types of wood are included in the definition of treated wood?

Treated wood refers specifically to wood that has undergone processes to enhance its durability and performance in various applications. This includes both fire-retardant-treated wood and preservative-treated wood.

Fire-retardant-treated wood is modified to reduce its combustibility and enhance its fire resistance, making it suitable for use in environments where fire safety is a significant concern. On the other hand, preservative-treated wood is treated with chemicals to protect against decay, insects, and other biological threats, thereby increasing its lifespan and structural integrity, especially in outdoor applications where it is exposed to moisture and soil.

By encompassing both types, the definition acknowledges the dual purposes these treatments serve: enhancing fire performance and preserving the wood against environmental damage. This comprehensive understanding of treated wood is essential for compliance with building codes and ensuring safety and longevity in construction practices.