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).
The magnesite has a few cracks in places, but is otherwise solid. See pic at https://drive.google.com/file/d/1tVSXCc ... sp=sharing So...do I need to treat the magnesite at all before the underlay and flooring is laid?
If the Magnesite is not damp then there is little point doing anything to it. As it is flexible you can put soft covering like carpet over it and you should be fine.
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