Horizontal stone shelf around corner bath.. grout or Silicon?

[Lloydyboy]

Hi folks!

Forum newbie here, be gentle (or not, I can take it).

I've boxed in around a corner bath, attached Aquapanel on to boxing with Silicon and screws so that it is flush with the bath top, and a slight incline towards the bath.. All good so far (or not, feel free to interject / mock 😉..

I intend to put rainbow sandstone edgers with bullnose around the bath so that they overlap the join between bath and Aquapanel as shown in the photo below.. All good so far??!
Assuming yes, I'm torn as to how to attach the tiles to the Aquapanel, and how to treat the joins.

My natural inclination would be to use tile adhesive.. I have a bag of Ultra Tile Proflex S2 with the fibre reinforcements (The green bag) left over from when I did the underfloor heating.

However my plumber says "just attach the tiles with Silicon, and Silicon the joints".. does this sound mental?!
I like this idea of it having ultimate flexibility and water proof qualities, but I thought I'd put it to you fine professionals for peace of mind.

If the consensus is to stick with the tile adhesive, would you recommend Silicon or grout between the joins of each tile?

I'm thinking Silicon again for water proof peace of mind and superior resistance against heat expansion/contraction but again would prefer confirmation from you pro's.

Obviously I'd Silicon under the bullnose to seal it to the bath at the end.

Thank you for any reply folks!

 

[bsc ceramics]

do not stick them down with Silicon use a good flexible adi and grout as normal with a good flexible grout and Silicon the joints between tile and bath and around the edges and you should be fine

 

[Lloydyboy]

Thank you for your advice, cheers for taking the time to help, much appreciated