How to treat dry rot
Dry rot is much more serious than wet rot and, once started in damp conditions, will continue to grow even when the damp has dried out. It starts in timber and usually spreads across and through brickwork. Timber affected by dry rot breaks up into small rectangles and often has grey or white, felt-like fungal growth on the surface. In time, the fungus can form 'fruiting bodies' - large, pancake-shaped fungi, with rust-red spores on the surface.
The treatment of dry rot is drastic and must be complete. All affected timber must be removed, with a safety margin of 450mm (18in) to ensure that only sound wood is left. If timbers on one side of a wall are infected, check the ones on the other side carefully, too. As for wet rot, existing timber is treated with Cuprinol 5 Star Complete Wood Treatment and new wood pre-treated with Cuprinol Wood Preserver Clear. All infected timber removed should be packed up in large, strong plastic bags and burned or disposed of as quickly as possible
