How to extend a brick wall with a uniform plaster surface without soft joints?

[JDA]

I have a wall of aerated concrete that I want to extend by 25-30cm.
What materials should I choose to continue with the plastered structure without getting cracks or needing to use soft joints?

I'm considering wooden studs - plywood - drywall - plaster, but I'm wondering if it might be a bad idea to mix organic and mineral materials and if that risks cracking? There's a raised floor with underfloor heating underneath, so masonry is not an option.

What do you think - should I choose other materials or am I worrying unnecessarily?

 

[Stefan N]

Glue the Ytong blocks and plaster, wood will definitely not work well.

 

[JDA]

Glue ytong blocks and plaster, wood will definitely not be good.

Will it be good with ytong blocks directly on the floor chipboard then?

 

[Stefan N]

You hang them on the wall, glue with tile adhesive, and secure with dowels.

 

[JDA]

You hang them on the wall, glue with tile adhesive and secure with dubb.

Dubb?

 

[Habilis]

Or steel frame wall with minerit as a plaster carrier?

 

[Stefan N]

Iron,

Stud?

like this. https://www.instagram.com/p/DHF0VB9oYCd/