Double wall with internal seismic load-bearing masonry or infill, made with Leca Bioclima Sismic Thermoinsulating Bioclima BX 25 NZ expanded clay blocks (25x20x25), light insulation (λ=0.032 W/mK) and external cladding in architectural Lecablocco facciavista (thickness 7-12 and module 20x50/12.5x25 cm), with a smooth, split, polished, bush-hammered and striated surface. The internal blocks are laid with normal mortar and plastered, the external ones with fair-faced mortar.