I would like to install a shower grab bar into my tiled shower. I would like it very secure and so found some studs (using a magnet to pick up drywall screws). The studs do not line up with the ideal spot for the grab bar, but the closest one is not too far away, so I decided to put it there.
The problem is that this stud is located right at the edge of the tile wall. The tile surface is about 8.5mm (5/16") away from the wall. I would like to make an 8.5mm thick spacer to support the portion of the grab bar that is off the tile. That will make the surface flush and then I will use (much) longer screws to mount the grab bar to the stud. Since the holes in a grab bar are usually in a triangle pattern, I think I will only be able to get one screw into the stud on each side of the bar.
Is this going to end in disaster, with the grab bar pulling out of the wall when I really need it? My thinking is no, since even one screw into a stud is quite strong. How do pros do it when there are no studs behind the desired spot? Can you ever get more than one screw of the grab bar into a stud?
Thickness of tile. Drywall screw visible showing stud location:
Proposed spacer idea (front view):