ᐅ Cladding in the floor construction at the staircase

I need advice on the best way to construct the floor structure at the staircase landing since there is no wall there. Later, a wooden railing will be installed, and the side surface of the floor structure will be covered with wood.

I don’t quite understand the question.
Screed -> Railing -> Floor covering?
Or what exactly do you want to know?

The insulation, underfloor heating, and screed need to be in contact somewhere; otherwise, the screed will flow away. However, in the end, when the screed is set, everything should align in a straight line—from the edge of the plaster to the floor construction, which will be clad with wood on the side.

If I had said back then: "find the mistake"

frsytiwo schrieb:

The architect is designing the house for us until the building permit / planning permission is granted.

... a whole bunch of (readers) wouldn’t have understood that again.

KingJulien schrieb:

I don’t quite understand the question.
Screed -> railing -> floor covering?
Or what exactly do you want to know?

He probably means: at the transition where the stair-side walls rise up to the floor — at the collarless stair opening — you’ll now be looking at the bare floor structure. Now a covering solution for this mess is being sought.

If you didn’t “dismiss” the architect after service phase 4, you’d have someone who should already have drawn the answer. But trying to communicate that as a novice is like shouting into the void — no one picks it up.

frsytiwo schrieb:

The insulation, underfloor heating, and screed all need to rest somewhere, otherwise the screed will run off. But in the end, the screed should be perfectly level — in a straight line from the end of the plaster to the floor construction, which will be clad with wood on the side.

Nope, if it's only about preventing the screed from running over the edge — you “form” that with a simple plasterboard edge.

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Level, formwork, what else?
Who is responsible for that?
Cover any "bare" surfaces with wood, tiles, plaster, or whatever else.
I still don’t quite understand the issue...

You can, for example, apply wood or plaster on it. I will have the stair builder install wood on it.

However, I am still not sure how it will look finished, since I have a 20cm (8 inches) structure in the upper floor. I am worried that it might be too much.