Thermal behaviour of the palm trees facade (048)

The façade of the Renaissance hotel in l’Hospitalet has a peculiar thermal behaviour. It is based on retarding thermal loses with the concrete wall –thermal inertia- while minimizing the thermal leap between the two sides of this wall with a closed air cavity at its outer side. This closed air cavity has its thermal insulation improved by a reflective membrane coating one of its sides. Thermal gains in summer are controlled by the reflective capacity of the white serigraphy in the glass and, again, the reflective membrane. The architects resort to this solution in the south, east and west façade. The northern is different. We ignore whether this solution is achieving the expected behaviour.
Besides the thermal behaviour there are a lot more things to say about these white facades with palm tree leaves. Let us just bring your attention to one: the palm tree window. We really appreciate the design efforts made so as to blur the window limits appealing to the complex geometry, to the non-orthogonal cut of the hole in the concrete panel thickness and to the diffuse limit of the serigraphy in the glass pane. The distance between the outer glass pane and the concrete panel increases this limit blurring as the observer looks from the inside to the window. Only one inconvenience: the difficult linkage of the glass that closes the hole in the concrete panel and this panel. The irregular opening perimeter obliged to fix and seal this glass from the outside leaving a gap between it and the concrete surface difficult to be finished.

Renaissance Fira Barcelona Hotel

Plaça d'Europa, 50-52
08902 l'Hospitalet de Llobregat Barcelona

Year of construction
Weight of the entire facade
Finishing material
Supporting element

Ph4, Ph10-11: Ribas & Ribas Arquitectos

Ph1-2; Ph5-9: Cristina Pardal

Ph3: Zarateman


More information at: Arquitectura Viva 164