"Set Square" wrote in message


When ordering the window, make it a few mm less the the actual aperture in
both width and height - plus a bit more if the angles of the aperture are
out of square - otherwise, you'll never get it in!

If you can see that the brickwork is excellent, plumb and level, get it
made to measure otherwise allow a quarter of an inch height and width,
to allow for scew. Tell the maker what you have done.

If it goes pear shaped it is down to you. If they measure it, it is down
to them. You can plane some off a plastic window. Not like you can with
a wooden one though.


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