The project is based on three premises: to understand the value of the history of Lleialtat Santsenca (1928), a former workers’ cooperative in the Sants district; know exactly the (physical) state of the building to take advantage of everything that can be used; and be sensitive to the whole process of collaboration that the neighbourhood organisations began in 2009 to recover it.
There are four basic objectives: first of all, to take advantage of everything that was useful in the original building, demolishing what was not reusable; second, to draw up an intervention strategy defining those essential actions, of a more conservationist or more additive nature, which allow the recovery and increase of the potential use of all the spaces; third, to establish an intense dialogue – and have it if necessary – with the context; and fourth, to draw up a sustainable proposal, both with regard to pre-existent and new interventions.
Inspired by the Lina Bo Bardi Office Theatre, the Atrium is a bioclimatised intermediate space capable of structuring all traffic through a set of walkways and stairs that evoke the image of construction scaffolding. The building operates thermally based on passive strategies based on inertia and insulation; three light roofs allow natural lighting and facilitate ventilation.
The increase in the volume of the roofs makes it possible to capture the sun: in winter it captures heat which is reversed by means of recuperators; in summer, the air in the upper layer of the Atrium is overheated, generating a very powerful convection that expels hot air through the windows of the ridges, powered by automatic sensors.