With this project we want to exemplify the scarce use of materials with which HArquitectes resolve their architecture, and therefore their facades. In this occasion, only two materials: thermal insulation and perforated brick (gero). If in the interior wall, the structural support, the brick is arranged in a suitable way so as to resist the loads transmitted by the slab; in the outer wall, the same brick is arranged rotated showing its perforated surface, therefore, allowing the chamber between the two walls to be ventilated.