(57) An assembly for fitting to existing window frames and comprising a vertically sliding
sash window arrangement with two panes, e.g. of frameless synthetic resin sheet, has
the first pane pressed against the flanges of the side channel members of the assembly
by a continuous resilient strip at each side and the second pane is pressed against
the back of the first strip at each side by a second resilient strip. Both strips
abut against the side frame member by means of disengageable hook formations.
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