F wrote:
On 05/07/2007 13:43 The Natural Philosopher wrote:

I would definitely rely on glue.

I glued one on in similar circumstances and the adhesive I got from the
glaziers grabbed the mirror almost immediately. There was no need for
any support within a very short time.


I reckon ten to 20 minutes..BUT if its big and heavy thats long enough
to slide crooked..hence shove a batten under.

It sets off hard overnight, on plaster anyway. Guess it takes a week or
two to go full strength.