Decay

Decay in lumber refers to the breakdown of the wood caused by fungi or other microorganisms. Decay typically occurs in moist conditions, where the wood is exposed to high levels of moisture and is unable to dry out properly. This can be caused by exposure to rain or groundwater, or by high levels of humidity in the air.

The fungi that cause decay feed on the wood and break down its cellulose and lignin, which are the primary structural components of the wood. This can weaken the wood and cause it to become soft and spongy, which can affect its strength and durability.

To prevent decay in lumber, it is important to store and handle the wood properly, keeping it dry and protected from moisture. This may involve using treated lumber, applying coatings or preservatives to the wood, or storing it in a dry, ventilated area. If decay is already present in the wood, it may be necessary to remove and replace the affected areas, or to treat the wood with fungicides to prevent further decay.