I'd have thought finding where the water was getting in and fixing it
might be more effective.

Indeed -- you can't treat any damp without first identifying
its cause. Mistreatment will at best have no effect, but
could make it worse.

--
Andrew Gabriel

I agree, but it is a small area /about 1.5 meters long/ and it is not very
bad.
The ground level outside is higher /to close to the membrane/ than it should
be.
So I would like to try a cheaper method before any more serious construction
work.
The question remains, has anyone use it and how does it compare to the
''traditional''
liquid injection method?
peter