Floor in concrete optic / Screed floor

Why are such floors so expensive? Because you can charge such prices (because people can't do it themselves) or is it due to the material/labor effort?

Our architect explained to us that it is very difficult to get it done neatly and "one" has to be able to do it. They probably charge for that.

Ah ok, is it then about the putty technique, which is difficult? Every painter and varnisher should be able to do it, right?

It is something different from painting and varnishing. You also have to provide a warranty... The floors also tend to crack sometimes, etc. Therefore, it is ruled out for us right away.

Ah ok. Painters also offer decorative putty techniques on walls and know how the slap works so that it looks good. Of course, they would also have to use the right material and seal it. Do you actually need a special screed for microcement?

Do you actually need a special screed for microcement?

So in the bathrooms we get a troweled floor (Beton Cire) and need a special screed for this regarding the issue of compressive strength.

So we are getting troweled floors (Beton Cire) in the bathrooms and need a special screed for the issue of compressive strength.

Which screed is needed?