Velux GGU INTEGRA Uživatelský manuál stáhnout pdf (Strana 105)

Building physics

VELUX 105

Vapour barrier

When a VELUX roof window is installed any vapour barrier present

is penetrated. It must be re-established with a membrane that

connects the window to the vapour barrier within the roof/wall

construction.

VELUX vapour barrier collar BBX is the easiest solution.

If the membrane used is not a VELUX vapour barrier collar BBX,

this membrane must be connected to the window rebate at the

frame with butyl or acrylic joint ﬁller to ensure tightness. Where

the window aperture meets the interior ceiling the membrane must

be connected to the vapour barrier of the house by means of tape

or tight overlapping joint.

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Velux GGU INTEGRA Uživatelský manuál Strana 105