Wet rot is a type of wood decay caused by excessive moisture, typically resulting from water leaks or poor ventilation. It occurs when wood is consistently damp, allowing fungi to thrive and break down the wood fibers. This can weaken the structural integrity of buildings and furniture. Common signs of wet rot include dark, discolored wood, a musty smell, and soft or spongy texture. If left untreated, wet rot can spread to other areas, leading to more extensive damage. Proper maintenance, such as fixing leaks and improving airflow, is essential to prevent wet rot in structures like homes and furniture.