It is an annex to the house of 80 m2 above the apartment of an owner painter Francisco Bosch (Paco).

A traditional Catalan vault proposed with bricks without holding column, but is four walls that has achieved a large space with a height of arc that corresponds to the height of 4.5m. The work took almost 20 days.

It is well ventilated and is vented ample space. No water is filtered without waterproofing of the vault.