Cladding concrete stairs with tiles, vinyl, or parquet?

but is also being planned

insured responsible detailed planners,

I also don't understand what you mean by GU planned and what is the detailed planner?

there is a threat of botched work and disputes over the fault for the poor fit. With GU (especially with GU and inclusive planners) one should refrain from such extra detours for quality and warranty reasons.

I expected that I only have to set clear boundaries for each trade. Covering the staircase should, for example, be independent of what we do on the floors, right?

Is this parquet on a carrier material like the one I posted in #10?

I am not a parquet specialist; the expert here regarding floor coverings is (I don't know to what extent also for stairs). I don't know what the sales consultant in the specialist trade meant. What the general contractor would offer you, in my guess, is a material in the core like a plywood board or kitchen worktop, veneered to resemble the floor covering (but certainly not from the same tree or even from the same batch). That they are not "identical twins" will always be visible, hence my suggestion of visually offsetting the risers, which softens such "contrasts."

Earlier, my attention was required elsewhere simultaneously, so I only "processed" one of your two posts:

I also don’t understand what you mean by GU planned and what is the detail planner?

Many builders – and I suspect you too – do not hire an architect, but include the architect services necessary for the building application in the construction contract (and simply leave out anything beyond that). Then a draftsman of the general contractor only produces structural drawings, which is a world apart from “detail planning” (in quotation marks), than what you could expect from a self-hired architect. In such cases, it is best to stick to the standard and by no means add your own personal chef to the team.

I expected that I only had to set clear boundaries for each trade. Covering the staircase should be independent of what we do on the floors, right?

No. Your staircase builder comes to the site when the GU’s work is not yet ready for acceptance. This in itself gives warranty complications that have nothing to do with scratches or dirty marks on completed work of other trades and go far beyond that dimension. Additionally, the staircase builder then does detail planning at most individually only for his trade (and if that does not fit with other details, the GU draftsman says that’s none of his business). If planned with your own architect and the GU is only the implementer of the planned design, the architect would then be responsible here (and also insured against consequences of inadequate task performance).

Conclusion: if you build with the GU according to their included planning, I strongly advise against wanting to be served high definition special requests. Too many cooks spoil the broth, and there is no adapter for 4711 to 08/15 (that doesn’t even work with the Siemens air hook going anywhere other than down the drain).

I saw something that uses a stair edge profile made of aluminum (as in the attached photos). That should work with a thin thickness and without mitering, I think. Do you know if it is stable and easy to install?

These rails always look like cheap renovation to me and tend to become the worst dirt traps. It is the worst of all conceivable solutions for me.

These rails always look like cheap renovation to me and tend to become the worst dirt traps. Of all conceivable solutions, it is the worst for me.

Is it just about the appearance? Or also bad from a functional point of view?

I still have to see it in reality anyway, but I am not sure about the stability and durability.

Many builders – and I suspect you too – do not hire an architect, but include the architect’s services necessary for the building application in the construction contract (and simply omit anything beyond that).

Ah yes, now it’s clear. Yes, that’s how we planned it.

Your stair builder already comes to the construction site even though the work of the general contractor is not yet ready for acceptance.

The commissioning of the concrete stair builder is carried out by the general contractor. I am also planning several inspection points by an independent expert. One of the inspection points would be after the shell construction (including the stairs).

I was just thinking of commissioning a craftsman myself for things like flooring and stair covering, since the person in charge at the general contractor has only very limited options.

That seems to be a clear boundary (at least from my perspective :) ) and does not require extensive coordination with the craftsmen of the general contractor.

Another thing that I wanted to do partly myself are some things related to smart home, but I am still discussing a clear delineation of responsibilities with the electrician of the general contractor.

Does that make the plan better?