Durability of wood and wood-based products - Guidance on performance

This document provides comprehensive guidelines for assessing the natural durability of wood and wood-based materials under various environmental conditions. It outlines specific methodologies for classifying timber species based on their resistance to biological degradation, including attack by fungi, insects, and marine borers. The text establishes a clear framework for determining durability classes, which range from very durable to very slightly durable, enabling consistent evaluation across different geographical regions. By referencing established testing protocols and data from field trials, this publication supports informed decision-making in the selection of timber for construction, outdoor applications, and other uses where long-term performance is critical. It serves as a technical reference for manufacturers, engineers, and regulators to ensure materials meet required service life expectations without relying on chemical preservatives alone. The content emphasizes the importance of understanding the biological context of wood utilization to enhance sustainability and reduce premature failure in wooden structures. It is designed to harmonize national practices with broader international approaches to durability assessment.