Rob G coughed up some electrons that declared:


Tim
AFAIK the characteristic of dry rot is that the mycellium will grow
out from the initial place of infection to seek moisture. If there is
a centre here - the rotted area - I would have expected dry rot in the
intervening 10 years to have spread out from that seeking moisture and
rotting the timbers in the process. The other factor is that dry rot
requires a degree of warmth hence the problem with adding CH to old
buildings - if this roof space is dry and 'cold' then any DR spores
won't have had an opportunity to develop.

That's very interesting - didn't know about dry rot not liking cold.
Regarding the 10 years - I would have expected serious devastation too, from
dry rot in that time, which gave me hope.


One of the best examples of DR I've seen was in an old building that
had wooden warm air ducts for it's CH - it also had a cavity
constructed wall with heather insulation. Sadly there was a water
pipe leak and DR developed in the ducting where the fruiting bodies
were large - was transmitted round the building and got into the
cavity insulation. I think in the end the building was flattened.

Anyhow I would, as you suggest, slosh some suitable anti-fungal stuff
around.

All the best and I well understand your worries.

The only time I've actually seen dry rot, was in a window frame and
surrounding wall when I was a lad, so only vague memories...

Thanks

Tim