Potato cellar - floor slab - construction

I can leave the wall as it is, no question, but how do I proceed with the floor? I definitely want to seal it weatherproof, also against rising water

The cellar has stood as it is since 1959. Why do you need to do something against rising water half a century after construction? What is the reason? And how do you secure the other floors and walls in the cellar? If at all, then comprehensively.

The basement has been as it is since 1959. Why do you need to do something against rising water half a century after the construction? What is the reason? And how do you secure the other floors and walls in the basement? If at all, then comprehensively.

I cannot say when and why he opened up the floor slab. In any case, I want to close the hole; that can only be advantageous, no matter whether it worked for half a century or not.

The other floors in the basement are fully tiled; only in this room is there an "exceptional situation."

The other floors in the basement are completely tiled, only in this room is there an "exceptional situation".

Then also store the potatoes in the other rooms and observe the difference

Then also store the potatoes in the other rooms and observe the difference

You guys are really jokers

I want to close the hole, come on, I need help. A floor touching the earth has no place in the cellar.

The basement does make sense. I would have concerns that you might get a problem between the wall and the new floor. Here, one or two users are renovating. Maybe they can help. do you know who that is with the timber-framed house?

This is a damp cellar. That is something good. It does not damage houses. It is just not made for metal tools. In ours, I once tried storing apples as long as they would last, which was 3 winters, though old varieties.

If you really can't resist, you have to do the joints besides the floor: scrape out and put in plastic-reinforced joint mortar. You can do that, convert such a room. I had a neighbor who did that, it stayed nice, it went like this: a floor slab, then screed and tiles, all floating. The floor slab was about as thick as for a garden shed. But the story doesn't end there, it will remain damp for a long time, dryers will be brought in down there, later a small fan heater will move in, it’s dark too and there will quickly be blemishes on the wall if painted. For a damp cellar being stubborn is expensive but if it's worth it to someone?

On terribly hot days, I have had cellar dinners down there, long table, white linen, candlestick, staying until one gets chilly. Wonderful!

Many greetings
Gabriele