Crack in concrete floor with damp

[Gnome88]

Hello everyone, I’m new to this forum.
We’re moving into a 1930s semi detached very soon. We found a crack in the concrete floor in the downstairs loo. It’s quite wet. I attached pictures of it here.
Any ideas what we could do about it?
We were thinking of tiling the floor in there.
Should we just try to get the housing association to deal with the crack? Could there be a leak? Is the water from within or without?
Could we just fill it, seal it, and tile over it?
Any knowledge on how to deal with damp and concrete greatly appreciated.
Thank you and merry Christmas.

 

[Notch7]

looks to me like water on the floor pooling in the lowest spot

is that a shower tray on the left?

 

[Gnome88]

Thank you so much for your reply
It’s a very tiny room, there is only a toilet in there, not even a sink. So I’m not sure where water could have come from.
It sort of looks like it’s crawling in from the side from underneath the skirting?
Adjacent rooms relative to the picture is kitchen to the east, entrance south, garden north and west.

 

[crazydaze]

The crack maybe a breach of the DPM if there is one, or, residual moisture rising to the weakest spot i.e. the crack/break in the floor surface.

 

[dazlight]

Grind off the paint then you need some ardex A46 external rapid repair , then a coat of ardex DPM1c r

 

[Gnome88]

Thank you everyone.

Grind off the paint then you need some ardex A46 external rapid repair , then a coat of ardex DPM1c r

If I grind the floor smooth and repair the crack, can I then paint the floor on top of that before sealing?
Or should I seal over the crack first before I painting, and then seal again?

 

[dazlight]

We usually open the crack up abit then pour in ardex DPM1c with sharp sand. Let they set then a46 over it