FB-02Work out what your wall is made ofTap the wall where you want the bracket: solid brick or block sounds dull and dead, a stud wall sounds hollow. Run a stud detector or a small magnet across the spot, looking for a line of screw or staple heads that marks a stud. Drill one small 2mm pilot hole to check — timber dust means a timber stud, fine grey swarf means a metal stud, and if the drill feels hollow then suddenly hits something solid a centimetre or two in, that's dot-and-dab plasterboard over masonry.