So explicit ,Thank you so much.I now know reason for the peeling of my wall paint. But is there any remedy for this?
EgunMogaji:
If you don't mind and while we wait for Herr Dokter Professor.
DPM = Damp Proof Membrane.
It's plastic membrane (basic really) that is laid down on the bare earth (laterite or sand filling) and before pouring the concrete slab (german floor).
This prevents moisture from rising up from the ground into the floors and walls. If you've seen some homes that have peeling paint and walls down near the ground then that's usually caused by rising damp (moisture).
They also use this membrane on suspended slab (decking) on top of the wood support but below the iron and plumbing works. They use this not for moisture but to have a smoother surface on the ceilings.