Shallow-pitched gable roofs in exposed concrete extend or replace the existing tiled roofs and have been complemented by a parallel steeper gable roof to form asymmetric double-gable ends. Beneath these, the uneconomical single-bay layout has been enlarged to a two-bay typology. The implementation of the master plan - divided into separate construction stages - envisages the reorganization of the original entrance structure as the future main entrance, plus the consolidation and extension of other cross-strips, and a new cross-tract in which communal spaces will be housed.
The first construction stage to be implemented comprises the 134-metre-long strip that closes off the east side of the courtyard, and the cross-tract at the south-east corner of the complex. The abstract form of the monolithic complementary volumes - alienated further by the partially cutaway plinth - lends them an independent appearance, while at the same time they are visually tied to the existing building by the facade design. Vaillo+Irigaray have cast the motif of the old double window as a stylized relief, running continuously in the surface of the concrete outer wall from the old building over the entire length of the new wing. The window openings themselves, however, follow the new axial grid of the layouts, which in turn results in an exciting layering effect. Variations in the height of lintels and balustrades create additional diversity and counter any sense of monotonous repetition with their individual design. The concrete has the coloration of the stone and mortar of the old facades. The creation of a different patina, depending on the orientation, was a feature conceived by the architects to integrate old and new even more tightly. Despite the increase in density, the intense relationship between the internal spaces and the verdant park surroundings remains intact.
