Similar to dry rot, wet rot is a wood-destroying fungus that primarily impacts timber that has become damp. Unlike dry rot, wet rot is less destructive as it is less likely to spread but can still cause structural damage in its localized area. Wet rot only occurs in timber that has been damp for long periods of time and will cause the timber to soften up. Leaking gutters, condensation, plumbing leaks or roof leaks can all cause wet rot to settle in and it is characterized by darkened timber, shrinkage, musty smell, cracked appearance, and localized fungus growth. Treatment includes identifying the source of the moisture and removing it with a fungicide or completely replacing the affected timber.