The Harry Walker building was designed by Francesc Mitjans, one of the Barcelonese architects who pioneered the Modern movement in Catalonia. Originally, the transparent and the opaque elements of the facade received the same treatment. His interest in the facade as a continuous element led Mitjans to choose very slender stainless-steel material for the window frames. As a whole, the main facade is conceived as a large panel located between the vacancies of the ground floor and mezzanine floor, both of which are recessed from the plane of the facade and the top storey.

The general purpose for the refurbishment was to recover the building’s original image by using materials and constructional systems that would meet the modern requirements for comfort without losing the essence of the original project. The solution chosen was the one closest to the original and available on the market: welded steel glazing bars, galvanised and lacquered with a finish similar to stainless steel. Thanks to their reduced thickness, these steel bars allowed modern requirements to be met while maintaining the original appearance of a terse, continuous panel.