HOW IT WORKS ?

An intelligent membrane is completely air impermeable and can alter its vapour resistance/permeability depending on the direction of heat flow and the average relative humidity between both sides of the membrane. It allows vapour to diffuse through it when humidity is high within structural elements, either due to seasonal change or unexpected moisture intrusion.

When the average humidity is low (winter condition), the membrane resists the penetration of vapour into structural elements, preventing interstitial condensation.

If the average humidity at the membrane is high (summer conditions), the membranes vapour resistance decreases substantially. This permits drying to occur in summer months if required and decreases moisture accumulation within the construction over seasonal periods, something traditional vapour barriers/checks cannot do.

In this way, these membranes are characterised as intelligent. An intelligent vapour check controls the moisture which may otherwise become trapped within structural elements, even after the building is sealed airtightly and complete. Intelligent vapour checks are characterised as having humidity variable properties.

When installed in conjunction with suitable tapes and adhesives this functions as a durable airtight layer with maximum safety against unanticipated moisture entry.