The Above Sheathing Ventilation airflow, characterizing ventilated clay tiles roofs, can significantly reduce the incoming thermal heat in summer period and thus the energy required for indoor cooling. If this is combined with an increase in roof “air permeability” by means of improved tiles shape (“under-tile” ventilation), a further improvement in summer performance of the roof and benefits for the entire building are obtained. This work aims to promote an innovative concept of passive building cooling and to diffuse the use of ventilated and permeable roofs (VPR) and HEROTILES-based roofs (HBR) as effective, sustainable and low-cost solutions for climate adaptation and mitigation. The methods and the equipment of a novel experimental “air permeability test”, developed as part of the LIFE SUPERHERO (“SUstainability and PERformances for HEROtile-based energy efficient roofs”) project, are presented. Preliminary results, achieved by the project partners, on different roofing systems are also discussed.