What can I do about this air gap when my window is open? This is a very old apartment and the windows are garbage; probably over 100 years old since it's a renovated factory.

I want to get air circulating in my apartment but I also want to keep out any tiny flying invaders.

I am currently using packing tape to seal the gap but I have to remove it every time I want to close the window.

There is probably another gap at the top that I can't reach. These windows don't seal well at all and are even dry rotting in some places.

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  • I see a window, but I don’t see a gap. Could you take a picture of the gap and the frame around it? – Lee Sam Sep 6 '20 at 23:49
  • I think it's the gap between the mobile part and the screen. – Jasen Sep 7 '20 at 1:00

move the screen outdoors so that it fills the space between the fixed part of the window and the window frame.

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