For the ¼ inch Hardiebacker use 1 ¼ inch screws. Now tape the seams working with fiber mesh tape. Use a flat trowel and thinset to go over it. Allow it cure overnight just before tiling. The continuous circulation of tiles from the floor to your ceiling draws the eye https://floor-and-wall-tiling-spe26812.blogdemls.com/36502854/what-does-bathroom-tiling-mean