A really interesting refurbishment proposal for a 1959 office building from a well-known catalane architect, Francesc Mitjans.

The challenge was renovating the façade, improving its thermal and watertight performance, while being respectful with a relevant building of the catalane recent architecture history.

It is not easy to constructively solve the façade of a building when this facade is supposed to be placed between the edges of the slabs, and the slabs have all of them different perimeters. The distance between a point on the edge of a slab and the equivalent point on the upper slab is always different.

The term “conventional” is really poor when we refer it to such an exceptional façade. However, considering the taxonomical criteria we are using on this platform: the material form of the façade supporting element is amorphous, and the watertightness mechanism is by material barrier. Besides, the watertightness function and the supporting one are solved over the same element so the classification is clear.

It is difficult to understand the need for building this thick, load bearing, cast in-situ concrete wall hidden behind a light cladding composed of different layers: mineral wool, coloured ribbed plates and glass slats. On the inside, the concrete wall is again hidden, on this occasion by furniture. The climbing formwork system that made this wall possible had to be successively cut to adapt to the changes in the diameter and curvature of the tower. The preparation of the reinforcement must have been equally difficult.