sounds like a classic case of turning a molehill into a mountain. Get a dehumidifier with humidistat and most likely the problem will disappear.


NT

Get a drone and photograph it.

I am running a dehumidifier at the moment near the dampness but what was concerning me was the wall was getting wet rather than damp (maybe a subtle distinction) after the work was done.

I like the suggestions of a drone. I will investigate that.

Clive