In article ,
"Dave" writes:
Thanks for that info Andrew. Its been a few years since I did mine, but when
the first window fails in the upstairs, I will elect to remove the frame and
fit internal glazing. Reason being, I'm 58 this year and I don't fancy
balancing on a ladder again while I fit an external glazing unit :-((((

As to the larger section of PVC frame, I can stand that, as the windows are
not that small to have much effect on this aspect.

If internally glazed windows also use window tapes (I don't know
if they do, but I suspect so), then you will need access to the
outside to cut it out. Of course, one way to get access to the
outside from the inside would be to smash the window and work
through the opening ;-)

--
Andrew Gabriel