Tiling the kitchen floor

[tfs]

yes, you will get away with using the mesh tape and feather all the joints with addy

 

[Jackal]

Thankyou for your help guys

 

[The D]

make sure the floor has no bounce in it and screw the floor boards down before you lay the hardy.

 

[Alberta Stone]

Any cement board is not a structural material, merely a smooth surface.
The code requires minimum subfloor thickness of 1-1/8th inch comprised of 2 layers of plywood, screwed and glued to the floor joists.
Then you can add cement board if you wish for a smooth surface to work on.
The floor joists need to be crossbraced as well.
I don't have the code book as I loaned it out so I am not sure what the deflection parameters are.

If you are just putting cement board directly onto the primary deck then...good luck.
You would be better advised to screw the heck out of the primary deck and install Ditra mat as that will do a superior job compared to the cement board.
But.....do as you will.