Renovation of the former Belgian Sawmill of Madrid, which houses the Medialab-Prado headquarters, is based on a design aesthetic that is light and versatile. The hub of stairs that connects the two buildings is coated with a double membrane of fibreglass with silicone. This material allows for a smooth passage of light, which, together with the lighting system, provides a truly unique lighting effect. There are 51 ETFE double layer cushions fastened onto the existing metallic roof structure.