I am actually doing my own kitchen and am installing 5 8 durock directly to my floor boards.
Laying durock on floor.
Use this first row as a guide to keep tiles and grout lines.
I have gone behind numerous tile setters to remedy their work when they thought as many of the others that are commenting here that using thinset under 1 2 durock over 3 4.
I have about 60 of it already screwed down.
Apply adhesive with 5 8 v notched trowel mortar with 1 4 square notched trowel.
I m almost done with laying 300 sqft of 4 x 47 porcelon ỉn a kitchen.
If there is a difference e g the floor is lower on one side lay one vertical row of tile from highest point down to floor.
Screwing the plywood.
The floor determine whether floor is level by measuring distance to desired tile height on both sides of area to be tiled.
Use this first row as a guide to keep tiles and grout lines.
Try laying tile over 1 2 durock or hardie and see what happens when the joists are 19 2 or 24 on center.
Hope you didn t like your beautiful new tile floor.
I am using the correct screws and spacing them 6 8 apart.
Affix tiles with dabs of mastic.
Thr floor was not level and the làdy just didnt wsnt to go thru all that so i later 1 4 ditra mat down instead of backerboard.
Lamination laminate 5 16 durock brand underlayment to minimum 5 8 thick exterior grade plywood or oriented strand board osb using adhesive or mortar suitable for bonding cement backer board to the subfloor.
The floor determine whether floor is level by measuring distance to desired tile height on both sides of area to be tiled.
5 steps to a sound ceramic floor.
If there is a difference e g the floor is lower on one side lay one vertical row of tile from highest point down to floor.
As im towards the end.
So far 75 done it seems like the tile is good in place.
It has to be rock solid before you lay the 1 2 in.
Fasteners place underlayment with joints.
Affix tiles with dabs of mastic.
The home depot guy didn t mention anything about gluing down the durock.
Prepare a solid squeak free subfloor one of the keys to a long lasting tile installation is the underlying subfloor.