Quartz tiles on top of existing 40mm worktop?

[cozybadger]

Hi,
Currently tiling a kitchen and the customer has selected some 305x305x10mm quartz/granite tiles to tile over her existing 40mm laminated worktops.
This will be a first for me!
Does anyone have any opinions/ideas of how to prepare the surface, what adhesive and grout to use please?
(My mother bought a table for her breakfast room that has slate tiles inset in the middle of it. As I recall, the grout lines were filled in with a matching colour silicone. Could this work for worktops or should an epoxy grout be used?)
Finally, my customer would like tiles cut to edge the worktops rather than having any type of wooden/metal beading. Good news is the worktop are 600mm deep so 2x305mm tiles would give a 10mm overhang. That plus grout line would allow for the depth of the tile on the edge without any cutting so a square edge could be created if they stick!
Not too sure about this one?
Any help/advice would be most welcome.
Cheers,
Colin

[nybor62]

i would over board the work top, with cement board , and yes epoxy grout, as you will be preparing food on it

[cozybadger]

Hi Nybor62,
Thanks for your advice.
My only concern would be the increased depth of the board. 6mm is about the thinnest Hardibacker isn't it?
This together with the tile (10mm) and adhesive, it would raise the worktop level by almost an inch.
Would youjust screw the boards to the worktop or lay on a bed of adhesive too?
Cheers,
Colin

[nybor62]

just screw them , should be fine

[cozybadger]

Many thanks for your advice.
Colin