As part of the long overdue kitchen revamp, we are looking at an
induction hob mounted on a granite worktop. It is a De Dietrich hob,
glass with no frame round it, and we would like to embed this into the
granite so that the glass hob surface is at the same level as the
granite.

I have been told that we would have to leave about a 5 - 10 mm gap
around the glass to allow for expansion; I do not believe this to be
true as glass does not expand very much and it is an induction hob
with small, localised hot spots. I would have thought a 1 - 2 mm gap
around the hob, probably filled with a black silicone compound would
have sufficed.

Does any one have any experience of this, or comments?

Thanks

Andy Bernard