6321 Sheet metal protective wall surfacing (0) Sheet metal as a protective surfacing to walls 6322 Sheet metal decorative surfacing (1) Sheet metal decorative surfacing to vertical surfaces and soffits externally and internally 6323 Rigid sheet plastics surfacing to walls and soffits (19) Rigid sheet plastics laminate decorative finishes to walls and soffits externally and internally 6324 Stone slab surfacing to walls and soffits (0) Stone slabs as a surface finish to walls and soffits externally and internally 6325 Resin-bound crushed stone slab surfacing to walls and soffits (1) Resin-bound crushed stone slabs as a decorative surface finish to walls and soffits 6326 Terrazzo slab surfacing to walls and soffits (0) Terrazzo slabs as a decorative surfacing to walls and soffits externally and internally 6327 Installation of precast concrete, GRC and reconstructed stone thin slab surfacing to walls and soffits (0) Installation of precast concrete, GRC and reconstructed stone slabs as a decorative finish to walls and soffits 6328 Glass slab surfacing to walls and soffits (0) Glass and mirrored glass slabs as a decorative finish to walls and soffits