ᐅ Should the toilet cistern be boxed in or built into the wall before plastering?

Hello,

The bathroom in my basement is currently still in shell construction. It will be plastered soon. How is the concealed cistern installed?
Should I build it in with aerated concrete blocks (Ytong) before plastering?
Or plaster first and then cover it with double layers of OSB/gypsum fiberboard?

How is this usually done there?

Thanks and best regards

Normally, you would build the outer wall first and then apply the plaster.

I prefer to apply the plaster on the exterior wall first to ensure airtightness. Everything after that doesn’t matter.
For an interior wall, it doesn’t make any difference anyway.

tadeus321 schrieb:

How is this usually handled there?

Exactly as you planned. You are the client / decision-maker.

tadeus321 schrieb:

The bathroom in my basement is currently still in the shell stage. It will soon be plastered. How does it work with the concealed cistern?
Should I build a supporting wall with Y-Tong blocks before plastering?
Or first plaster, then double-board with OSB/gypsum fiberboard?

According to the situation shown in the photo, the construction is intended to be boarded only before tiling. Building a supporting wall beforehand does not seem reasonable, useful, or even planned here.

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