How Cutting a Single Tile before Toilet Installation?
Use an angle grinder to score the circular shape into the tile. Attach a 4 in (10 cm) diamond wheel blade to the grinder, and position it so the circular blade is at roughly a 45-degree angle to the tile. Slowly work your way around the circle traced into the tile, using very light pressure. You only need to score the tile about 0.125 in (0.32 cm) deep on this initial pass
Use caution at all times. Tie back long hair and remove any dangling jewelry, and wear long sleeves and safety glasses. The grinder will kick up a lot of dust, so wear a dust mask and consider buying a vacuum attachment that you can connect to your grinder. Angle grinders are an affordable and useful small power tool you can find at any hardware store.
Diamond blades are more expensive than other blades you can get for the grinder, but they cut through tile much better. Cut sacrificial break notches if the circle is near the tile’s edge. If there is less than about 1.5 in (3.8 cm) of space between your traced circle and an edge of the tile, there’s a good chance the tile will break while cutting it.
If this is the case, use a grinder to cut two or more deep lines from the circumference to the nearest edge of the tile (about half of the tile). Our goal is to have tiles stick to these selected, controlled points, not random ones. Once you put the tiles in place, the straight, short, controllable cracks on the tiles will be almost invisible, especially because the toilet will be placed on them.
Continue grinding around the circle with gentle pressure. Once you’ve finished scoring the tile surface and creating any sacrificial break notches, keep making slow, steady passes with the grinder at a 45-degree angle. If the tile breaks at the sacrificial points, remove that section and keep cutting. Eventually, you’ll grind your way through the tile and have the circular cutout that you need.
