I have a 1920s house with magnesite laid onto concrete on the ground floor (presumably in the 1960s). Up until now, there's been lino on top of that, and then underlay/carpet. Needless to say that has caused damp problems because of moisture being trapped.
We've removed the carpet/underlay/lino and are now going to have new carpet laid (with a breathable underlay) in a couple of days time.
It really isn't an option to remove the magnesite and level the floor (too expensive).
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