What is the primary cause of wood decay?

The primary cause of wood decay is the activity of fungus. Fungi are microorganisms that thrive in moist conditions and break down the cellulose and lignin in wood, leading to structural damage. They require organic material and moisture to grow, and once wood becomes damp, it can become a breeding ground for these organisms.

Fungi can cause various types of wood decay, including brown rot and white rot, each affecting the wood's integrity in different ways. Control measures typically involve reducing moisture levels, using treated wood, and ensuring proper ventilation in areas where wood is used. Therefore, understanding the role of fungus is crucial in preventing wood decay and maintaining the structural integrity of wooden structures.