Tough call here - gcol is very experienced, and generally we agree, but not on this point I fear.chrisz said:uh-oh, contradiction! if i sit the tile on top like gcol suggests, then seal between tile and worktop, will this not be a sufficient seal?
If you abut the bottom of the tile to the worktop then there'll be no gap to seal - you'll be relying on creating a strip of sealant against the tiles rather then underneath.
This is more critical on baths and shower trays than on kitchen worktops, but, personally, I prefer to use the same method at the bottom all tiled walls.