Isover Vario KM Duplex
The Vario Membrane acts like a sensitive skin – altering its structure depending on relative humidity
The Vario Effect in winter – Micropores in the membrane cloase, preventing vapour from the warm interior diffusing into the timber structure and so protecting against potentially damaging interstitial condensation.
The Vario Effect in summer – As the structure warms, moisture that has entered the timber structure from outside will vaporise. Responding to this pressure the membranes micropores open, allowing the vapour to escape and diffuse harmlessly into the building interior.
One of the Varios key features is its variable sd-value. This allows the membrane to diffuse 25 times more moisture in the summer than the structure absorbs during winter.
The standard of moisture management also provides unrivalled protection for timber structures in other ways, for example:
Wet timber following rainfall during construction dries out faster
Water ingress from leakages is managed effectively
The membrane automatically adapts to long heating & short drying period, inlike conventional membranes that behave the same way in all conditions.
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