Which type of screed do you prefer?

Okay then let's hope the memory fits like that and there's no buzzing from various pumps or anything

The EPS probably remains inside after all....

6cm EPS
9cm screed
Together with the room in one piece.

Is that okay or also compliant with standards regarding structure-borne sound?

It looks like the EPS will remain after all....

6cm EPS
9cm screed
Together with the room in one piece.

Is that okay or compliant with regulations regarding structure-borne sound?

So your 1,000-liter buffer tank ultimately rests on EPS insulation? I can't judge whether the 9cm screed can handle it, but at least our craftsman said that EPS insulation always gives a little.
9cm screed takes ages to dry. Normally, screed thickness is somewhere between 45 and 65mm.

With structure-borne sound, as long as there is no contact between the screed and the raw floor or the walls, there's no problem.
You can neglect the structure-borne sound – in a direct comparison between EPS and XPS. That's more of a subjective issue. More interesting is the setup with the buffer tank. In my case, the entire technical room was lined with 50mm XPS and above it 60mm cement screed without underfloor heating.

Apparently yes... 9cm because the 3cm impact sound insulation like in the rest of the frame is missing for you... The cables that are at the buffer are already installed in the wall UP and Accesspoint

The pipes on the wall should be equipped with a rubber buffer on the clamp, then it is okay. Just ask your executing company whether the buffer on the EPS insulation is uncritical.

The pipes on the wall should be equipped with a rubber buffer on the clamp, then it's okay.

Good question - can you see them clearly?

Just ask your executing company if the buffer on the EPS insulation is uncritical.

The company said so... maybe because it's already finished... Is there a standard for this?