|Photo is a little poor, as auto-focus doesn't like the dark.|
I'm hoping this is temporary, as there is a rainwater down-pipe on the other side of this wall that is not fully connected. I'm hoping this is contributing, and not that the lower level of the new floor has somehow gone below a water table we were as yet unaware of. It is over a metre below ground level at this point, so it could well be, and the fact there is now hardcore, topped by a membrane and then 15cm of concrete might just be fording water up the wall more than before, when it was just clay and stones. Frankly, I'm worried, as this just cannot be good for the foundations or the walls.
|Small pools of water at foot of wall, coming over damp/proof membrane.|
|East gable, south end, and a big patch of wet wall.|
|See? Wet, not just damp.|
|Water coming down under the tiles, and over the fascia board.|