Due to the impossibility of recovering the original west façade, the proposal plans a new façade that has absolutely nothing in common with the previous one. It is a transparent and opal glass façade, with an air chamber and special treatment that will enable an increase in the natural lighting of the original warehouse, adapting it to the new uses.
Glass has been considered as the differentiating element between the elements of the original warehouse and the new elements. These contemporary materials (translucent glass and transparent opal) are different from the materials of the late-19th century and yet reflect and multiply the parts of the work planned by Gaudí.
In contraposition, the south and east façades are built according to the warehouse façades that are known from a photo taken by Joan Bergós. To comply with all the regulations regarding thermal and acoustic insulation, without changing its original appearance, it was decided to double up the roof and wall of the east façade. A timber framework was placed in the roof with flat tiles seen from below, over which insulation was projected with another flat tile on top. The view of the interior and exterior of the roof is the original one but it is constructively doubled.
This doubling of the roof meant that the loads to the wooden structure increased. The structure of the parabolic arches of the warehouse was strengthened, by means of stainless steel sheets, inserted between the wooden structure of each arch to hide it from view.