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That is very interesting.
We have some minor low level damp around the chimney in the 'dining' room in our Victorian 3 bed.
We are about to rip up the flooring so I've asked the builder to investigate what's causing the damp. I'm wondering if it's connect to the adjacent fireplace which is blocked up and has been for at least 15 years.
I was considering a chemical DPC course in the area but having read that it seems like a waste of time!
There is no such thing as 'damp'. It all has a cause. Fix the cause and you fix the problem.
Chemical injections are total bullshit.
https://www.architectsjournal.co.uk/archive/rising-damp-is-a-myth-says-former-rics-chief#:~:text=Stephen%20Boniface%2C%20former%20chairman%20of,a%20complete%20waste%20of%20money'.