ᐅ New wall built around the corner on screed floor

We want to enlarge our open plan kitchen by taking part of the hallway and are considering the best option for this.
The new wall (in green) is 25cm (10 inches) thick and forms a 90° angle, as shown in the graphic. Additionally, a glass door will be installed in the new wall. The wall must be placed on the screed because there is underfloor heating installed. I would also like to avoid screwing it in place.

From my point of view, the following options seem possible:
1) Drywall: The problem is that the bottom track can only be glued to the screed.
2) Aerated concrete blocks (Ytong): The issue is that there is very limited sound insulation.
3) Brick wall: Not possible on (floating) screed, or am I mistaken?

Do you see other options? Any additional issues? Which option would you choose? Thanks in advance!

The decision has already been made in favor of a drywall system (metal studs and gypsum plasterboard walls). I have three questions regarding this:

1) What type of adhesive is best for fixing the U-profiles to the floor?
2) Is it possible to install a glass door in the wall this way (with the profile glued to the floor, and screwed on one side and at the ceiling)?
3) How should the joints between the existing masonry brick wall and the new wall be sealed? Should they be simply filled with joint compound, or do the joints need to allow for movement?

aj-5760 schrieb:

1) What is the best adhesive to attach U-profiles to the floor?
2) Is it possible to install a glass door in the wall this way (adhesive-fixed profile on the floor, screwed on one side and at the ceiling)?
3) How should the joints between an existing brick wall and the new wall be sealed? Should they simply be filled, or do the joints need to accommodate movement?

1) I would use a flexible mounting adhesive.
2) That’s difficult if you can’t screw the U-profiles at the bottom. I’m not sure about that.
3) I would use separating strips and seal the joints with acrylic or joint filler.

aj-5760 schrieb:

The decision has already been made in favor of a drywall system (metal studs & gypsum board walls).

Why? That will be unstable, I wouldn’t trust it! Build an 11.5cm (4.5 inch) aerated concrete wall instead. The sound insulation rating is amateur stuff. It’s simple, durable, and the soundproofing is good (there are better options). I built a house like this last year for a client with two small, energetic children, and it’s perfect. I would never glue drywall with doors as permanent loads. And the sound insulation isn’t better either.