Alan wrote:
In message o.uk, Dave
Liquorice wrote

Rising damp, how far up the wall does it go? Assuming there is a damp
course make sure that isn't bridges by plants/soil etc and is at
least 4" above ground level (6" would be better).

Or rotted wooden window frames or cracked window sills and it isn't
rising from the ground.
In my case it both dripped down inside the walls from rotten bargeboards
and rise up from the lake under the floor after it rained.

There is a common myth that penetrating rain and rising damp do not
exist. Both do.