The membrane should be installed on rafters, parallel to eaves, with writing facing upwards. Start at the bottom of the roof, so the membrane edge overlaps eaves flashing. The membrane should be slightly tensioned to prevent its pushing or pressing to the roof covering by the thermal insulation layer. The film should be installed with 15–20 cm overlap, and glued to ensure its integrity. The membrane should be fixed directly to rafters with roofing staples. The membrane should not be exposed to UV light for more than 2 weeks, as after that time it can start to lose its properties. For correct functioning of the roof thermal insulation layer it is also necessary to install the vapour barrier film on its inner side.
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