Velux GGU INTEGRA Manuel d'utilisateur télécharger pdf (Page 53)

Special installation conditions

VELUX 53

Place underfelt/underfelt collar and drainage gutter above the

window so that they are overlapped by the nearest rooﬁng plate

above the window.

UNDERFELT ON HARD BASE

Connection to underfelt on hard base – boards or sarking – can be

carried out with VELUX underfelt collar BFX as well as standard

underfelt in rolls.

Note! As in some cases an uninterrupted underfelt is required,

ensure sucient drainage by ﬁtting slat with screws and joint ﬁller

as shown. This also ensures connection to the underfelt (in rolls) or

the underfelt collar BFX above the window.

Connection to hard underroof

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Velux GGU INTEGRA Manuel d'utilisateur Page 53