The starting point for the backsplash should be the center of the wall or a point centered behind the sink.
If the countertop is level, use it as the reference line for the first row of tiles. Otherwise, snap a chalk line on the wall one inch up from the counter.
If the backsplash is below a window, remove the wood trim.
Find the center of the wall. Then spread a small amount of adhesive in the center.
Tile adhesive dries quickly — don’t spread more than you can cover in 15 minutes.
Lay the first tile, and work your way to each end.
Leave any extra space at the ends until all the rows are set.
You can use a wet saw to cut partial pieces. To mark the cut line, turn the tile over and set it across the space.
Hold the grout float at a 45-degree angle and push grout into the joints. Let the grout dry for 24 hours.
Wipe off the haze and use a foam brush to apply grout sealer.