Looking to move soon, the survey done on a bungalow reports slight
dampness low down on the inside of some external walls.
The building was cavity insulated with Instafoam in 2007.
Anyone know of any dampness caused by Instafoam (which has a 25-year
warranty).

The possible cause suggested by the surveyor was that the damp-proof
course was less than 150mm from the surrounding ground (which is
currently only 75-100mm below), so the ground level needed
lowering.

Can anyone here recommend a UK damp specialists who could check the
situation and give a diagnosis?

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/\/\aurice
(Retired in Surrey, UK)
(Replace "nomail.afraid" by "bcs" to reply by email)