Awning window - middle mullion?

Question

Hello, we are restoring my parent's home. There is space between the metal two windows in my old awning windows.

We don't know the middle part (mullion?) that runs vertically between the windows. We did notice some screws just spin that connect the two windows. Also the metal doesn't fit tightly as shown in our photo where a scraper slides under.

And secondly, should there be some kind of felt or gasket around each awning frame so they seal tightly more tightly? We weren't sure if it wore away over time.
Incl photos
Thanks
Elizabeth

Emily · Accepted Answer

Hi, Elizabeth.

Thank you for reaching out to us. I'm afraid I don't understand your first question. What are you asking exactly?

As for weatherstripping, most windows have weatherstripping all around the frame. I recommend checking for any slot in the sash where the old seal might have gone. It's another matter when it comes to identifying what you need. It's next to impossible to do so without the old weatherstripping as a reference. If you can find an intact and undamaged piece, we'll need to see a clear photo of the end profile to compare to our inventory.