Vapour permeability

Vapour permeability In other words, the ability of a material to allow water vapour to pass through its structure. In construction, this means that the material allows moisture to pass from the inside of the building to the outside, helping to avoid condensation in rooms, structural elements or building envelopes. Vapour-permeable materials, such as roofing membranes, help to ensure adequate ventilation and protect the building from moisture, which increases the durability of the structure and has a positive impact on the health of the occupants.