dealing with dry rot
Dry rot describes wood that has deteriorated and ultimately rotted under wet conditions and subsequently dried out. The deterioration is caused by a fungus that thrives in moisture, and can actually spread through healthy wood. The result can be quite a surprise to homeowners, when it is discovered in covered or concealed areas. The best way to protect any exposed wood is to treat it regularly against moisture damage. Untreated wood should be protected from the elements by weatherproof roofing or siding.
Of course any
wooden interior or exterior structures (under eaves,
in attics and crawlspaces, etc.) should be inspected
regularly. Fortunately, if the fungus is caught early
enough, the dry rot process can be stopped and
the wood can be repaired with treatment. However,
if the integrity of structural wood is compromised,
it must either be replaced or reinforced by the
installation of an adjacent piece, and should be
inspected by a qualified building inspector.