In message , The Natural Philosopher
wrote


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

Seldom the remedy for rising damp is injecting a new damp proof coarse
as has been done in many 100,000s of properties. The damp proof coarse
seldom fails and if you really do have rising damp then it is more
likely the coarse has been bridged. And then there is the simplistic way
that "surveyors" detect damp by using a meter that measures the
resistance of the salts in the outer 0.5mm of plaster.

--
Alan
news2009 {at} admac {dot} myzen {dot} co {dot} uk