Which type of wood is commonly used for its natural decay-resistant properties?

Cedar is commonly used for its natural decay-resistant properties due to the presence of certain compounds called phenols, which provide resistance to moisture and insects. This makes cedar particularly suitable for outdoor applications like decking, fencing, and siding, where wood is exposed to the elements and more prone to rot and decay. The durability of cedar makes it a preferred choice in environments where wood longevity is critical.

Pine, maple, and oak do not possess the same level of natural decay resistance as cedar. While they may be used in various applications, they typically require treatments or finishes to enhance their durability against decay, particularly when used in outdoor settings.