Steady hand and right tools
To drill a tiled wall and insert a dowel, it is necessary to have a good percussion drill and specific tips for masonry with a vidia plate.
Initially it is important not to press too much because the tip must center itself creating a small hole, then it will be possible to apply a higher pressure.
If the hole to be made is large, go step by step, make a guide hole with a diameter smaller than necessary and then repeat it with a bit with a larger diameter. This will allow you to drill more accurately.
It is necessary to be very careful because the systems often pass through the walls like water pipes or the electrical system, therefore carefully perforated trying to avoid unpleasant problems.
Tiles in gres
During drilling, stoneware tiles are very rigid and tend to break like glass.
One method to prevent this problem is to use diamond drill bits and avoid using the drill's beater function.
We also recommend to wet the tip continuously with water during cutting.