We are about to install a rimless ceramic induction hob into a granite
worktop so that the edge will be as seemless as possible with hob and
worktop at same height. The supplier is saying that there needs to be
a 2-3mm gap filled with silicone to allow for expansion.

1. What expansion? The ceramic glass surface is cold, and with
induction, even cooller than normal element or halogen. Less than 1mm
would appear to be more than adequate.

2. Is silicone the best material? It will doubtless be rough and as
thi sis an area that will be cleaned oftenm how long will it last.

Any thoughts?

Thanks

Andy Bernard