Sounds like you have a problem like I had last year. As I remember: you
slide the top edge of the window, into a slot in the aluminium. There
should be some kind of stop--missing on mine--to prevent sideways movement.
Hope this helps.


"Bob Hoath" wrote in message
...
We recently moved my dad's 8'x6' Hall's Greenhouse, but on re-assembly we
can't work out how the opening light hinge works. The stepped aluminium on
the upper end of the light doesn't appear to locate anywhere. Any advice
appreciated.