ᐅ Concrete slab – vapor barrier against rising moisture

Hello everyone,
in most constructions, you can see that a "membrane" (I can’t recall the exact technical term right now) is placed between the concrete slab and the masonry to prevent rising dampness.
In our shell construction, from what I could observe, this seems to have been omitted. Before I discuss this with the site manager, I wanted to ask for your collective knowledge to find out if this is normal, what the possible reasons might be, or other relevant information. Maybe my concerns will be resolved already.
I’ve attached a photo. If it had been done, you would see it, right?
Best regards

What you are referring to is a wall damp-proof membrane. In my opinion, that is not the proper way to do it. I also find it strange that your first row was built with aerated concrete blocks. In your case, that’s doubly problematic because aerated concrete absorbs much more water than a brick.

You mean a waterproofing membrane, such as the Katja Sprint.

That should comply with DIN 18195.

Grantlhaua schrieb:

I also find it strange that your first course was built with aerated concrete. In your case, that's doubly bad because aerated concrete absorbs much more water than a brick.

That is the damp-proof course. It has to be like that.

Aside from that, it seems to me that there is something black under the mortar of the damp-proof course.

The photo can be misleading, but it looks like there is a surface waterproofing membrane?

Thanks first of all for the answers.
So this black spot is actually the only place where you can see something. Nowhere else is there any mark. But what you see in the photo is firmly embedded in the concrete, as if it were burned in, so you don’t feel any edge or difference in material. Is it really common practice to place the membrane between the floor finish and the concrete slab?