- 14 Apr 2021
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Ah yes, the old myth that if you cut off its' water supply, it's dead as a dodo.The old dry rot myth.
Cut off its water supply and dry it out and it's dead as a dodo.
It often doesn't die when you cut off its' water supply, it can become distressed, in which case it will generate a fruiting body. It as likely to become inert - until the next time there is enough water to reactivate it. It can survive in that state for decades.
Because it can live in lime plaster and lime mortar it can spread a long way from a fruiting body, which is why on infected walls we generally replace any unseen timber to masonry connections (e.g joists pocketed into brickwork) with resin anchored steels which in turn carry new timbers. The worst places for dry rot are where timbers such as beams are pocketed into damp outside walls and on the top floors of buildings where roofs and gutters have been inadequately maintained , leading to a supply of water. Once dry rot has damaged timber beyond a certain point, robbng its' strength, the only resolution is to cut out the affected timbers and replace them