How to stop this window from sliding down

windows

I have what I think is a single-hung window that keeps sliding down (when it's open). I do not see any way to remove the sash (so that I can access the spring mechanism). All instructions I see on the web claim that there is either a release mechanism on the top of the sash or take out clips on both sides of the window frame. However, I see neither. Additionally, I do not know my window manufacturer and cannot find any marking on the window. Link to the pictures of my window is provided.

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Click for larger view

Pictures:

  1. Top of sash
  2. Frame above sash
  3. Frame below (open) sash
  4. Bottom of (open) sash connecting to the frame

My questions are:

  1. What kind of a window is this? (e.g. single-hung?)
  2. How can I fix it to stop sliding down? If I need to remove the sash first, how do I do it?

Best Answer

A wooden dowel sawed off to the right length to prop the window open is the traditional answer. You can keep the dowel on the sill when you're not using it.

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