Peter Parry wrote:
On Wed, 24 Sep 2008 12:50:46 +0100, Tim S wrote:

Toughened can be set
of with an automatic centre punch and the noise may be mistaken for
other things. Never tried this though - it's hearsay.

It works very well. It also works with double glazed units which are
notoriously difficult to break. Which is why it is a good idea to
keep such a punch in a clip by any double glazed upstairs window you
might want to get out of in case of a fire in the house. Throwing
chairs, the dog, toys etc against a DG window will rarely break it,
the air gap acts as a cushion.

I believe that the scumbags who break into cars use a spark plug to shatter
the side windows.

No personal experience.


--
Dave - The Medway Handyman
www.medwayhandyman.co.uk