(un)curtain office is a minimalist interior located in Ljubljana, Slovenia, designed by dekleva gregorič arhitekti. The refurbishment of the empty space started with reinforcement of the existing structure. The pillars had to be wrapped with carbon reinforcement that gave them also new visual identity. The floor had to be considered as a new structural element, as a reinforcement of the existing slab. In this manner the floor was done out of trowelled concrete, that gave the huge empty space uniform character. The character of the space was emphasised also with the trowelled glue ceiling.