PVC has proven its quality in numerous tests compared to other materials (such as aluminum, wood, etc.), both in terms of its impermeability to air and rain, and its resistance to wind and loads.

When we talk about airtightness, there are two key parameters that make a difference:

• Air permeability: This defines the amount of air that passes through a closed window or door.

• Water tightness: The water tightness of a closed frame is defined by its ability to resist water penetration.

Ventilation is crucial to maintaining acceptable indoor air quality. Additionally, proper ventilation can help prevent potential condensation problems.