Ian Stirling wrote:
In uk.d-i-y Guy King wrote:
The message from "Fray Bentos" contains these words:
I have a large dg window. about 8ft by 5ft.
Just how easy is it to drill a small hole in the opposing diagonal corners
and let it dry out in sumer then put a small bung of silicon in the holes to
seal again ?

Depends for one thing whether it's toughened or not. If it is, you ain't
a hope of drilling a hole.

There is, it's relatively easy, you just first anneal the pane

You can drill toughened glass, you just have to be careful
(and very slow), and use a fine abrasive and rod as ?? ago.