Analysed by Riwega experts to ensure the passage of air according to regulations and impermeability to water. It protects the under-tile area from access by birds and rodents. TIROLL AIR is available in aluminium and copper in different widths and colours. Its completely metal construction ensures its durability over time and resistance to all atmospheric agents (including UV rays). It is completely waterproof and secure even in the event of breakages, displacement or accidental removal of the ridge tiles.