How do you treat wet rot?
The first step is to remove the source of moisture. All decayed timbers should be replaced with pretreated timber, or wherever possible, a material not susceptible to wet rot i.e. concrete (lintels etc).
Wet rot is caused principally by Coniophora puteana. Poria vaillantii is another important wet rot fungus and a number of less common fungi also occur. While each fungus has its own unique features, the general appearance of wet rot is similar—as is the treatment. Wet rot is typically confined to the area of dampness because the mycelium does not spread into walls.