The suspension and fixing devices of the metallic structure are dimensioned in such a way to create a gap between the insulating layer and the external covering, an air chamber linked with the outdoors via ventilation openings that are generally placed at the bottom and at the top of the facade. This air chamber creates a natural and continual ventilation also called “chimney effect” due to a difference in indoor-to-outdoor air temperature.

 Air from outdoors goes from the bottom to the top creating a beneficial air flow increasing the moisture vapour transmission of the facade. Thanks to this ventilation system, aqueous vapour coming from outside quickly disappears, mist effects are reduced as well as the negative effects of water penetration, moreover, heat dispersion is reduced.