Light: 75 kg/m2 < p ≤ 125 kg/m2

The AC Hotel was one of the first buildings in Barcelona where it was used a ventilated façade system with a light interior layer made of cement boards over metallic folded sheet profiles. Since then, these systems have evolved looking for a clearer solution for the edge of the slab according either to the continuity of the thermal insulation as well as to guaranteeing air tightness –achieved by the cement boards and an adequate joints treatment.

Profiled metal trays, so common in industrial buildings, find a new use in this residential complex in Guadalajara, Spain. Even with great appreciation of the cleverness and simplicity of the solution, we cannot fail to mention problems such as the thermal bridges that occur through the metallic ribs, the lack of steam permeability, or the compositional limitations derived from the tray width.The thermal bridges are easily resolvable with additional insulation.

Renzo Piano gives us several examples of interesting ceramic façades, despite the problems that some of them may have suffered over time.The use of dry ceramics as a facade cladding, and the resort to prefabrication, are aspects that are repeated throughout the career of Piano experiencing different strategies in each project. In the case of the houses of the Rue Meaux, he bets for hang the ceramic from GRC support panels that close the building.

St Giles is one of the latest projects designed by Renzo Piano’s studio with a dry fixed ceramic façade. In this case, they resort to unitized panels for its construction. Despite using the latest façade technologies, St Giles does not show the wit present in IRCAM or at the Rue Meaux dwellings complex.

The building that B01 Architects built for Carburos Metálicos in Barcelona's Aragon Street, together with a great number of examples of the work of the Catalan architects Tous i Fargas, represents a step forward in the development of industrialized constructive systems.

Saint Paul's Crossing building attracts our attention as an example of using different façades solutions for a continuous glassed skin.On the one hand, are used unitized prefabricated panels; on the second hand, a stick curtain wall system.If the first covers most of the façade surface combining single layer panels with double skin ventilated ones, according to the façade sun exposure; the second, the curtain wall, resorts to steel profiles to resolve those areas with higher mechanical requirements or geometrical complexity.

In a city where iconic buildings follow each other, Grimshaw studio seeks to highlight using colour. Beyond chromatic issues, what we are interested to emphasize here is the complexity of the unitized panel formed by a double sheet and anchored in its upper third, at a certain distance from the top.The panel is transported, hoisted and placed with the double sheet already assembled. The interior sheet ensures water tightness and thermal insulation while the exterior, which partially covers the panel, acts as a solar protection.

The architects’ challenge in the NIDO building is to combine the residential use with the image of a high tertiary tower in the center of London guaranteeing the adequate level of comfort. To do so, they resort to two fundamental strategies. Firstly, the fragmentation of the facade plane in different areas, according to the different housing units. This firs strategy permits to combine views, ventilation and solar protection. Secondly, construction using unitized panels.