"AJH" wrote in message
...
A pigeon has just crashed into the window beside me and managed to fly
off, the window is broken. It's a 46mm by 88mm pane set in a fixed
metal casement with only 20mm rebate. Before I replace the glass I
thought I'd just ask if there were any point in trying to replace with
a double glazing unit, plainly there's not enough depth for a wide
gapped unit nor for traditional putty fixing. Also I think double
glazed units need to be able to "breathe" so they cannot be set in
putty??

AJH

Twenty+ years ago Magnet Joinery wooden frames used double glazed units
where the inner pane was smaller than the outer so that they fitted into a
standard frame. I've still got one in my utility room - don't know if this
is still possible today though.

Peter