Applications / Building and Construction / Variable vapour membranes

Building and Construction

Use energy more efficiently. Protect living spaces against radon and other gases. Protect the environment against leakage and emissions. EVAL™ barrier adds function throughout the construction site.

Variable vapour membranes

Protect construction from moisture & structural damage in both Summer and Winter

During summer, the moisture trapped inside the building structure will evaporate, allowing the building structure to dry out. Low Sd-value.


During winter, the moisture generated inside the building is blocked from diffusing into the walls and roof. High Sd-value


EVAL™ Sd values, from Summer (high RH) to  Winter (low RH) are shown below.
The wider the range in Sd value, the higher the humidity protection.

Sd values for EVAL