Porcelain Tile / September 1, 2018 / Brousseau.
Now that the pilot hole has been cut it is possible to drill the main (large) hole. Attach the appropriate diamond core and ensure that there is a constant supply of cold water (see water cooling information in the previous sections of this article). Diamond cores that are larger than 13mm will require an adapter with pilot pin that locates into the pilot hole that has been cut previously to ensure the perfect hole will be made. Starting the drill vertically begin to drill in a circular motion with sufficient pressure until the tone of the drill changes.
Cheap porcelain tiles can be difficult to properly install. Cheap tiles may look nice on the surface but they may not be able to be cut cleanly with a tile saw and may chip on the edges. Also if the tiles are porous then it will be difficult to clean up the excess grout. Grout haze can become embedded in the tiles and make them look vastly different after they are installed compared to what they looked like before they were installed. Cheap tiles can have quality control issues. Many times people choose their sample tile and then order them.
Drilling Large Diameter Holes (13mm or Larger). In order to cut holes that are 13mm or larger in diameter it is necessary to first drill a pilot hole. The pilot hole will act as a locater for a large diamond core and will help you to drill a perfect hole in porcelain tile. Attach an 8mm carbide drill bit or 8mm diamond bit to your drill. Follow the instructions given above for either Drilling Small Diameter Holes (10mm or Smaller) with Diamond Cores or Drilling Small Diameter Holes (10mm or Smaller) with Carbide Bits depending on whether you are using diamond cores or carbide drill bits. Leave out the final step in either case as you wont be drilling a fixing hole behind the tile.
For your walls or ceiling the PEI Class 1 porcelain tiles are recommended because they are not subjected to any kind of weight. The PEI Class 2 may be used as bathroom floor tiles where the weight exposure is minimal while the PEI Classes 3 and 4 are ideal as table top or kitchen top and as flooring in any part of your home. The PEI Class 5 is highly recommended for residential or commercial use where there is heavy foot traffic. Porcelain tiles are all weather tiles that can withstand heat exposure during the summer and the freezing temperatures during winter.