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Surveyor and previous damp work been done, I suspect those are remedied by fixing guttering, unblocking the ventilation, chimneys.
The damp proofing had been done and cover under guarantee (luckily free as it’s a 20 years guarantee from 2008 and 2014), so It good to get it done on top of doing the test to make it way less likely for it to happen again.
It’s the very late Victorian maisonette build in 1901 so not too bad.
Underfloor ventilation and fixing guttering/downpipes and general drainage is good, but I'm wary of damp proofing in Victorian building. Are you sure you need it?