For 2x4 tiles i just remove them from the mesh cut long 1 8 pcs of pine or however wide the grout joint is and put them up.
Tiling wall not straight.
Just slide the spacer right left a little so it can be removed when tiles are just setting up.
I explain why this method works soooo easy.
If your plumb or level is off by no more than a half inch over the course of eight feet it will show in your tile installation.
Much faster than individual spacers.
Here is an easy way to set your 1st row and the rest going up your wall then lastly the first row is set.
You may need to move the trowel over the adhesive a few times to ensure that it s thin and level.
Holding a bubble level to a straight six or eight foot board make sure that both walls and the floor are plumb vertical and level.
Repeat the process for the rest of the installation and.
Alternatively if the long wall is not tiled it could be feathered off with plaster to make the tiles look straight but it is not possible to guarantee success without seeing it first.
Pre mixed adhesive tends to be less expensive and work well for wall tiling.
Scoop out a golf ball sized amount of adhesive onto a notched trowel and spread enough adhesive in a thin layer over the wall to hang 2 3 tiles at a time.