Start by preparing the area you're going to tile. Make sure it’s clean and dry and if its porous make sure you prime it first.
To ensure your tiles are square, position a timber batten one tiles height from the floor or skirting board. When you've checked the batten is straight with your spirit level, nail it to
the wall leaving the nails protruding slightly for easy removal when later. Then using a plumb line, find the vertical and attach another batten onto the wall.
Now measure how many tiles and spacers it will take to cover one line on the wall. It’s important not to cut tiles too small, so reposition the tiles to ensure that you don’t need to do this.
Using a notched spreader, evenly apply the adhesive (no more than 2mm thick) from the corner of the battens and cover about a square metre.
Place the tiles carefully onto the adhesive, using spacers for a consistency between the tiles - this helps give a really professional look. Use your spirit level to make sure that none of the tiles are too proud from the wall and wipe away any excess adhesive with a damp sponge.
Continue tiling using the battens to guide you on both the vertical and horizontal placement for the tiles, but make sure you don’t cover too much of the wall with adhesive - you don't want it drying out before you've attached the tiles.
When you get to the ends use a tile cutter if you need to reduce the size, or bigger jobs you can always hire an electric one.
When you’ve finished tiling, leave it for 24 hours before grouting. Make sure the grout is pushed firmly into place, using either a sponge or squeegee.
Wipe away any excess grout and polish the tiles with a clean damp cloth.