SC-03Check for pipes and cables, then drillCables and pipes can run in places you don't expect, especially near a shower where shaver sockets, extractor fans and shower feeds are common. Run your detector over the area again right before drilling, but still treat the wall as if something is there - detectors miss cables that are deep, in metal conduit, or behind metal-backed board. Find your stopcock, usually under the kitchen sink, and check it turns before you start, so you can shut the water off fast if you hit a pipe. If you have any doubt at all, isolate the electrics at the consumer unit and turn the water off at the stopcock before you drill. Drill through the tile first with a tile or spear-point bit, then swap to the right bit for your wall - masonry bit for brick or block, a wood twist bit for timber studs, or a smaller pilot bit for lath and plaster or metal stud. Go slowly and let the bit do the work; forcing it cracks tiles and old plaster.