If you are installing tile on a bathroom wall, there's no need to install edge tiles because the tiles will end at the wall. However, you'll need ceramic edge tiles on a countertop, since the edges must be finished. Certain types of tiles are made for installing on edges. It is possible to install ceramic edge tiles yourself with a few basic tools rather than hiring a professional to do the job.
Measure the edge of the surface you wish to tile and locate the centre point with a measuring tape. Mark this spot with a pencil.
Install the ceramic edge tiles first because you will use these as a guide to place the countertop tiles. Evenly spread a layer of mortar on the edge of the countertop with the notched trowel. Make sure the space is evenly covered at a depth of about 1/8 inch.
Push the tile gently in place on the edge of the countertop, next to the centre mark. Place spacers between the tiles, which will help evenly position them.
Install the remaining tiles in this method and place spacers in between tiles. Use a tile cutter or hacksaw to cut the end tiles. Wait for the adhesive to set overnight.
Apply grout with a grout float over the edge tiles and work the grout into the spaces between the tiles. Wipe off any excess grout from the tiles with a damp sponge. Wait for the grout to set for two or three days before you use the countertop.
Always wear gloves and safety goggles when cutting and handling cut tile to protect your hands and eyes.