I have a question regarding the cellar floor of my 1950s house in germany. It has a concrete floor. In one room there are a lot of cracks in it. They are meters long, but only a few mm wide. When there are very heavy rainfalls and / or heavy snow melt, these cracks are wet. (Happens approximately once a year) The water presses up from down the foundation.
This never was a big issue, because after some days it is always dry again. However now this particular room should be renovated as a hobby-room. Among other things I want to lay out a PVC coating. Now if I would lay the PVC coating above these cracks, it would most likely start to mould under it, when the moisture comes.
So my question is... Can I somehow repair / seal these cracks, so the moisture stays away?