The gap between the facade layer and the building wall behind, is subject to an ongoing flow of air created by natural convection. This naturally occurring “free” airflow provides multiple benefits including: •Thermal insulation – realising savings on HVAC energy costs •Acoustic insulation •Reduction of water ingress – (rainscreen) •Drying effects of moving air – prevents damage from being constantly wet •Reduced variation of building temperatures – less stress from thermal movement.