I have double-hung windows that are original (1960s). Outside of the windows themselves there are 3 additional tracks. Of those 3 tracks, the outer 2 have solid panes, the inner one has a screen. How do I get the outermost pane out? Half of the glass broke out and I want to replace it.

Picture: https://imgur.com/a/CGRVVyk

It's extra dicey because I can lift this pane up, but it just falls right back down. The other pane, and the screen, both have spring-loaded tabs that keep them up, but not this one.

Also, what do you call these "extra windows"? I've heard of storm windows, but these don't look like what googling "storm windows" brings up. I suspect I wasn't finding answers because I'm not searching for the right term.

1st time homeowner and I've learned a lot from this forum -- thanks, everyone.

I have double-hung windows that are original (1960s). Outside of the windows themselves there are 3 additional tracks. Of those 3 tracks, the outer 2 have solid panes, the inner one has a screen. How do I get the outermost pane out? Half of the glass broke out and I want to replace it.

Picture: https://imgur.com/a/CGRVVyk

It's extra dicey because I can lift this pane up, but it just falls right back down. The other pane, and the screen, both have spring-loaded tabs that keep them up, but not this one.

Also, what do you call these "extra windows"? I've heard of storm windows, but these don't look like what googling "storm windows" brings up. I suspect I wasn't finding answers because I'm not searching for the right term.

1st time homeowner and I've learned a lot from this forum -- thanks, everyone.