If you are planning on installing grab bars in the bathroom but have fully tiled walls, you might figure that you’ll use your stud sensor to locate the studs behind the tile. Unfortunately, while stud sensors have no problem scanning through drywall and similar materials, very few of these tools owned by the average homeowner can reliably work through ceramic tile. For that, you typically need a scanner that uses radar to “look” through the wall, and those are generally very expensive. However, some deep-sensor stud finders with settings to locate metal are able to penetrate tile with fairly reliable accuracy, so it’s worth giving one a try if you are set on fastening something heavy to a tiled wall.