Non-ventilated structure

Increasingly, the designer wants to achieve a slim roof package, making it different from the traditional structure with a relatively high ventilated cavity. Also, with the renovation of roofs, the thickness of the total package can be a problem. The choice is on a non-ventilated, vapor-tight system with the advantage of a slimmer design.

What is a non-ventilated structure?

A non-ventilated structure is a roof and façade construction with no ventilation or air cavity. Thermal insulation followed by a roof covering system is fitted to the support structure. This produces a single-layer, non-ventilated structure. This concept is highly suited to sloping roofs and façades with zinc. To avoid the formation of condensation the structure must be damp proofed. Internal condensation or condensation resulting from nocturnal temperature drops, do not form in this construction either. This represents a major difference with a traditional cold roof system. When building this structure the preference is for a damp-proof system with a μ.d (or Sd) value of at least 150 meters.