Ive just moved into a new house where the Double Glazing was installed some 6 years ago but i do not know who installed it. When the wind whips down the street, it causes my windows to let out a shrill whistle. This is occurring in both of my windows in the bedroom , therefore causing an awful annoyance and lack of sleep. Does anyone have any ideas as to why this is happening. Im guessing that its to do with the seals but they all look ok to me? If you apply pressure to the window it will temporarily stop...until you take the pressue off!! Doe it need a complete new re-installation of the windows??