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I don't think it does, at least I doubt it - think it's the full original setup from 100 years ago when the houses were built
I was down there this morning and there was a ring of slight wetness around the very base of the basement, following the very heavy weekend rain - I'm not massively worried about that (probably foolish) but think it probably puts paid to my notions of getting floor sealed...
cozzzzzzzz-
i think some cement-based tanking coat would work. I used something like this https://www.permagard.co.uk/basement-waterproofing/cement-tanking in an upright wall application, it has little crystals in the mix which expand when damp and create a waterproof seal. Leave for a week or so o activate, then paint over
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Just try and seal it as much as you can from the outside, stick a dehumidifier down there and enjoy your rough hewn subterranean beauty.
allshookup
withered_preacher
Any idea of the basement floor has a dampcourse?
If, (that's a big 'IF), you could clean the surface, (concrete)
suficiently all the way to the edge/corner/joint with the walls,
you might be able to apply a water-based epoxy.
Whether the cured epoxy surface would blow under the hydrostatic pressure
the next time the water table rises would be a risk you would have to take.