I hae an aluminium framed greenhouse with twin wall plastic glazing. Dudley blew the opening window off it twice(a peculiar piece of design work for a hinge that can come entirely loose easily). As a more permanent fix I have drilled small holes throug the pane and the panes both sides and put loops of wire through to hold the panes together around the frame. I might be doing this in other panes if Eunice is as strong as predicted.
At least with plastic panes I wont have glass all over the garden!

Robin