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@Zakaria, interzone walls must indeed share the same vertices (in reverse order from each other), and their constructions must share the same number of layers. Yet as stated here, both constructions must also share the same multilayered materials (in reverse order from each other if asymmetrical), e.g.:

Wall A

  • layer 1: 16mm cement board
  • layer 2: 140mm mineral wool insulation
  • layer 3: 13mm gypsum board

Wall B

  • layer 1: 13mm gypsum board
  • layer 2: 140mm mineral wool insulation
  • layer 3: 16mm cement board