AndyG

OK thanks. I'll look that up.

I don't think it can be the glass within the frame because the original problem is that the window barely closes any more (I have to lift and push past an obvious obstacle... but I've tried planing the bottom part of the frame and window and that made no difference. Though I admit I'm still not sure I've identified WHERE the window hits the frame when it won't close.)

Difficult to get the whole window (3m high in a small room!) but this is the top and bottom while closed. Does that help?

Thanks for the quick reply Mark. The hinge is still straight. In fact now I look at it again to answer you question I see that the whole glazing unit can be moved back and forward about 5mm along the line of the frame... so left to right in this photo. So when I push it left, my 2cm slip at the bottom probably disappears... but it wants to hang right. Does that change your answer at all? If not, do I need professional help>? Because I don't know what "packing a glazing unit" involves!

hi I have a big set of wooden double-glazed windows (fitted new in 2017) and the opening part of the window has slipped about 2cm (see photo) and so it no longer closes. If this were an IKEA cupboard door I would know which little screw to tighten to bring the door/window back up... but it's a bit more complicated. Could someone tell me if the 12 (14?) point star screw is what I need to turn to adjust the hang of the window ? And if not... any ideas how I can do it? (The window has 2 hinges, top and bottom is 300cm high) I can't find a brand name for the windows and the builder who fitted them is no longer around. Many thanks in advance