Facades mediate between interior systems and public perception, functioning as interfaces through which structure, programme, regulation, identity and urban context become selectively visible. The Factory Becomes an Urban Signal provides the first material test through the Trole Building, where a former coffee factory in southern Madrid is transformed into twenty-four atelier and office units; the white zinc skin deliberately contrasts with the surrounding brick industrial fabric, while reuse, fire regulations, existing structure and collective identity are negotiated within the same architectural operation · AtmospherePosture · https://antolloveras.blogspot.com/2026/01/the-trole-building-madrid-south-white.html. A Renovation Can Reveal the System provides the second through CJCM, where an existing Madrid building is reworked through precise structural and spatial adjustments; the double-donut anatomy and tectonic austerity make adaptation itself legible, showing how an existing system can be transformed without being replaced · AuthorityFragment · https://antolloveras.blogspot.com/2017/11/cjcm-reforma-integral.html. These works gain density across the field through Urban Taxidermy 027 · SOCIOPLASTICS-8474 · https://www.youtube.com/watch?v=zTZIBXrJngY; the Anto Lloveras archive of September 2023 · SOCIOPLASTICS-6081 · https://antolloveras.blogspot.com/2023/09; Matricaria chamomilla · SOCIOPLASTICS-6427 · https://holaverdeurbano.blogspot.com/2026/07/matricaria-chamomilla-manzanilla-comun.html; Smith — Toward a Theory of Uneven Development · SOCIOPLASTICS-6618 · https://tomototomoto.blogspot.com/2026/07/smith-n-1979-toward-theory-of.html; Bibliography Operates as Architecture · SOCIOPLASTICS-4013 · https://antolloveras.blogspot.com/2026/05/the-socioplastics-bibliography-operates.html; Ten Instruments Toolkit · SOCIOPLASTICS-1397 · https://antolloveras.blogspot.com/2026/03/the-toolkit-comprises-ten-instruments.html; Edward Relph · SOCIOPLASTICS-2638 · https://ciudadlista.blogspot.com/2019/09/edward-relph.html; and Copos 607 Urban Series · SOCIOPLASTICS-5292 · https://www.youtube.com/watch?v=QUESHXm-wWo Across these returns, Trole Building and CJCM establish the proposition through two adaptive-reuse conditions: one uses a visibly differentiated envelope to construct a new collective urban identity, while the other relies on structural and spatial precision to reveal how an existing building can be transformed from within. The facade therefore operates as a public interface because it mediates the relation between internal systems, regulatory constraints, inherited material conditions and the way architecture enters collective perception.