Damp Cobblestone floor in basement (Ed.)

[Matty0682]

Hi,

I live in a 200 year old property with a basement. The basement floor is s combination of flagstone and cobblestone which have been sealed (not sure what with but is transparent, see first pic).

There was a smell of damp coming from beneath the basement stairs (the area was sealed off). I have exposed the area under the basement stairs. and there are more cobblestone but not sealed with anything.

What can I use to seal these cobblestone? At the moment I am using a dehumidifier and letting it breathe.

Or do I leave it as is?

Thanks

 

[cross thread]

My opinion is property of that age need to breathe