Dry rot is a fungus that destroys wood and leads to timber decay. The fungi feed on the cells of the wood and compromise its strength and quality. Wood decay in buildings is often characterized by darkened, cracked, and weakened wood.

Conditions that favor dry rot include excessive dampness in areas with insufficient ventilation, which allows spores to germinate. Untreated and unprotected wood in any type of property is susceptible to dry rot, necessitating urgent repairs. Dry rot also affects painting projects, as it causes paint to chip or peel. Replace wood affected by dry rot before painting it.

Signs of dry rot include a strong, musty, or damp smell, which many will detect before noticing the damaged wood. Sometimes, the odor may indicate wood dampness before it progresses to dry rot. Wood with visible damage will also indicate dry rot; it looks brown and brittle and easily disintegrates in the hand. Additionally, tiny cracks in wood or paint are also an indication of dry rot.

Finally, spores, which appear like red dust on the wood surface, indicate major dry rot. If left untreated, it can become hazardous to human health.