Gorell windows missing part

There is no part to show you. That is the issue. All of the windows have open channels on each side with nothing in them to stop the air infiltration.



Hello,
There is not generally a specific part or seal used in the window channel but the sashes themselves do have weatherstripping such as wool pile, which is partially visible in your second photo. I would recommend checking all of the weatherstripping to see if it may have worn down over time and needs to be replaced. If so, we would need to see end profile photos and written-out dimensions of each seal to compare to our inventory here. Thank you!




Based on what I can see in your photos, the weatherstripping looks fine and the window looks like it was installed properly. The manufacturer used a coil spring balance system and being a tilt-in window, weather stripping is not required to cover the exposed opening at the top of the sash ends. The square cut-out hole in the sill is for drainage and shouldn't be filled in. Unfortunately, I can't think of any additional measures that you could take to seal the window since all of the original hardware appears to be accounted for and in good condition.