hi first fix the tile on the ply using epoxy chem leaving groves to be filled later with epoxy grout fix the ply with tiles on celling with fastener and then apply epoxy grout to fill the groves later left

Thnks a lot gor taking your time from aura interiors.i admired your work been a follower too....im waiting till my kitchen slab is fixed in black granite galaxy.... My idea right now something young and luxurious looking which black n metallic will give... Any suggestions regarding toughed glass for kitchen is it durable... Houzz has so much to offer...great help... Thnks again

@Rock Doc: Are you addressing this to me? I haven't actually bought these tiles yet - when I do, I will definitely be going for the handmade ones. They're a work of art and irreplaceable in my opinion. However, there are also screen-printed tiles available in the market in more or less the same patterns; the workmanship is of course different, but you get them cheaper, and they're also more easily available. You could give that a shot. I'd recommend Aakaar Flooring Solutions - they're here on Houzz and are able to provide both the above-mentioned types.

Mukti, From what you described, it seems you need a water softener than a hydrophobic coating. Salt based softeners are good for these issues.