In message , Peter Andrews
writes

"Tim Lamb" wrote in message
.. .
Apart from the use of a hammer, is there any easy way of checking that
double glazing units fitted to my new front door are actually toughened?
Elsewhere in the house, glass below waist height has an etched kite mark
and BS number.

Is such glass necessary where the width is only a bit over 4"?

regards

--
Tim Lamb

See http://www.planningportal.gov.uk/wal...000001244.html

Apparently not. So long as the total area does not exceed 0.5m2 and the
narrow width is less than 250mm. Quite big really.

regards

--
Tim Lamb