NOISEY.

        I know the Velux© is set at the same angle as the Roof - obviously; BUT can't, in all honestly say that Rain has ever roused me through night.
NOW.
        T B H I'm not 100% sure I was 100% conscious - BUT - I do remember coming round enough to decide I would not get out of Bed to see if the vent was closed.
        You are now looking at the overnight's offering; I'm glad we lived on a hill.