With a 3 16 v notched trowel spread mastic just under the laser line and down the side of the tub wall to a small area.
How to level walls for tile.
Remove any remaining dust oil or grease with tsp tri sodium phosphate or an ammonia based cleanser.
Use tile spacers if necessary to keep the tile lines straight in the layout.
Slide a 4 foot straightedge or level over the wall in all directions to check for plumb.
I also talk about the difference between a traditional shower system with a referred to as a water in water out system.
How to get flat walls for your tile.
Thus they need to be installed in a square space.
Check the wall first to see if it is straight.
Let the wall dry thoroughly.
Use a 360 degree laser level to mark a line for laying the tiles.
If you need a tile levelling system will be today check the raimondi tile leveling system out.
Start by removing any molding switch plates outlet covers and other hardware attached to the area being tiled.
Fasten a straight ledger to the wall to support the tiles.
Do this prior to any tiling job.
Once you are ready to lay the tile start at the corner with the chair rail border image 2.
Apply a 1 8 inch 0 32 cm layer of adhesive to the wall.
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.
Spread thinset mortar on the bottom center of the wall.
The obvious way to tile a wall is to start at the bottom and work your way up.
And that works fine if the base of the wall usually the floor or bathtub is perfectly flat and level.
Remove the ledger later and trim tiles to fill the gap below.
Start applying the adhesive in a bottom corner about 1 tile length away from the bottom and side of the wall leaving space for the edge tiles.
Spread the mortar with the flat edge of the trowel then groove.