Nature
Spread by airborne spores which settle on damp wood in badly ventilated rooms. The mycelia of the fungus [Serpula lacrymans] can grow through bricks, mortar and wood. Infected wood turns dull brown and breaks up in cube shapes. The rot may travel over 2 metres a year, causing major structural damage to buildings. It tends to occur where there has been flooding, rising damp or leaking plumbing.
Incidence
In the UK, it has been estimated that 25% of houses have either dry rot or wet rot.