Integral rehabilitation of the Castellana 77 building by the international firm Luis vidal + Arquitectos. Its main claim, the white ETFE slat facade not only with an aesthetic objective but also energy efficient. The surprise, Castellana 77 will light up at night, with ETFE being the main star.
With a total of 448 slats the integration of this element is achieved on the façades of the building. A geometrical challenge to obtain the slats between the vertical uprights of the facade without interrupting the continuity of the desired curvature. Therefore, there are slats with different dimensions and radii of curvature, however, most of them have a rectangular and flat shape of 1.52x0.6m The function of the white ETFE is to wrap the aluminium frame adapting to its shape by applying the necessary tension thanks to the specialized design of the perimeter sections, creating a chamber inside the frame. All slats integrate an RGB LED lighting system inside that illuminates the building at night time. Regarding the installation, the ETFE slats are assembled in a workshop for their subsequent placement on site as a single element, fixed at both ends.