The ventilated or transventilated façade is an exterior enclosure construction system consisting of an inner leaf, an insulating layer, and a non-watertight outer leaf. This type of façade generally allows for durable, high-quality finishes, and offers good thermal performance.[1]​.

A metal substructure intended to support the exterior finishing sheet, as well as a layer of insulation, is anchored on the façade of the building (inner sheet), using plastic dowels or adhesive "Mortar (construction)" mortar. Once the insulating layer has been placed, the finishing sheet is mounted. The substructure leaves an air chamber of a few centimeters between the insulation and the plates that make up the second skin. The joints between these plates are open, allowing air flow.

The exterior panels can be made of various materials: stone, wood, fiber cement,[2]​ sandwich panels, slate,[3]​ etc.

The outer or finishing skin must have grooves both at the bottom and at the top, to allow air renewal. At singular points (ridge line, window perimeter), flashings or other protective elements must be provided to prevent water from entering the internal chamber, as it would reduce the effectiveness of the thermal insulation.

The existence of joints between the façade pieces avoids the typical problems of expansion, so they are façades that look good for a long time. The outer sheet also cushions temperature changes in both the thermal insulation and the waterproofing, prolonging its useful life. Finally, the existence of the outer leaf helps to reduce the thermal losses of the building: in the summer months the outer skin heats up, creating a convective effect that circulates the air inside the chamber. This “chimney effect” removes hot air and renews it with colder air. In the winter months the air in the chamber warms up, but not enough to create the same effect and heat is better preserved. Another advantage is that its maintenance tasks are minimal. It cleans itself with rainwater.