A good part of the façade is resolved in steel and glass, following the style of the Nordic and American office buildings of the time. This type of enclosure generates energy losses that are out of date with current regulations. The steel pillars cross the entire façade, giving rise to thermal bridges that, according to the study of the façade module, meant very high losses, not to mention that the biggest factor that determines these changes is the windows, since having a transmittance of 5.7, the losses of this façade module represent 700 W.