Moisture sealing of floor slab

Not necessary. The track should just overlap the stuff under the walls a bit. Then everything is sealed - and good.

It is not necessary. The track should just slightly overlap the stuff under the walls. Then everything is sealed - and good.

Does that mean that no adhesion between the moisture barrier and the masonry barrier is necessary there? That would also explain why many foils only have side adhesive strips. The front sides therefore do not stick.

That will be welded. Or am I misunderstanding something now.

I always wonder what this is even supposed to be good for, where is the moisture supposed to come from?

Oh, believe me, a C20/25 concrete slab is not waterproof. It seeps through from below. Or the sides. Hence a barrier.

Oh, believe me, a C20/25 concrete slab is not waterproof. It seeps through from below. Or the sides. That's why you need a barrier.

So why do you not necessarily need one with WU basements, is that then a different concrete?