My casement window leaks water to the inside when it's raining. It has been leaking a while. It looks like it's leaking between the glass unit and the sash but the caulk between the glass and the sash on the outside does not look compromised.

How can I diagnose and fix the problem?

leaking window

  • Casement windows are hinged and swing horizontally, and should be pulled tightly closed by the operating mechanism against a weatherstrip. Have you inspected the "landing area" of the sash to see if there is a weatherstrip seal, in good condition? Does the operator mechanism firmly pull the sash closed? – Jimmy Fix-it Jan 20 '17 at 7:19
  • can you tell us the manufacturer of the windows and do you know how old they are? I have casement windows in my house that is 18 years old and they are starting to leak just like yours because the weather strip is start failing. – d.george Jan 20 '17 at 10:25
  • They are jeldwen windows and I suspect they are 8-10 years old. The weather stripping looks ok, and the leak is appearing above the weatherstripping. I can't imagine a way the the water would get where it is if the weather stripping were the problem. – John Jan 22 '17 at 19:21

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