Damp concrete floor by upvc french doors

[robhing123]

I have a damp area by my upvc french doors.

There is a crack in the concrete floor approx 16cm from the doors. In this crack I can see what I presume is the plastic floor dpc? I've attached a picture. Should this run all the way up to the door?

Should I be able to see a hole at the bottom of the drainage hole?

What can I do to resolve this?

Thank you in advance.

 

[robhing123]

Looking at it again, it looks like the plastic floor membrane runs up to the inner wall skin of concrete blocks (where the crack in floor is) Could I take up the thin screed layer and paint a liquid dpc up to the door?