Ed_Zep wrote:

I know that "damp meters" are much derided here as they don't
accurately say if there is damp in a wall or not but, as they *are*
used by surveyors, what level of dampness do they normally say is
something that's a problem or are they just a bunch of rip-off artists
and will say that the walls need doing if the thing beeps at all?

Thanks.

Would it not be better to ask at what damp levels a problem really does
occur, ie symptoms of a damp problem occur? Yes there is false positive
diagnosis.


NT