A ventilated facade is a facade construction with an air gap between the insulation and the facade cladding. This gap is open at the top and bottom and the cladding has small open joints. This creates a way for natural ventilation of the facade.
A ventilated facade can be viewed as a raincoat: it protects a building against the weather, while at the same time creating a healthy indoor climate. This is why the building technique of ventilated facades is often referred to as rainscreen cladding.