In maintaining my sash and case windows I've come across a problem...where there's a single window the secondary glazing frame is mounted tightly to the bead, and is a few mm narrower than the window I need to pull in to do the maintenance.
I can't see any way round this other than to remove the frame, which I expect would be a PITA. It sits so close to the sash there's only a couple of inches between it and the glass, so (1) hacksawing a sliver off doesn't seem viable (the sash only rises 8" or so) and (2) I can't get at the sash to chisel/shave a few mm off it to clear it.
Any thoughts?


