AB-04Drill and fit the right fixing for your wallSolid brick or block: drill 60mm deep with a 6mm masonry bit, insert a wall plug and drive in the screw. Plasterboard on timber studs: locate the centre of the stud and drive a 50mm wood screw straight in, no plug needed. Plasterboard on metal studs: never use a wood screw or plain plug, they strip straight through 0.5mm steel; use a self-drilling metal-stud fixing rated for the load. Dot-and-dab: the board sits on a 25-50mm air gap over masonry, so use a long fixing (75-100mm) that passes through the plasterboard and dabs and grips the masonry behind, not a short plug in the plasterboard alone. Lath and plaster: aim for a timber lath or the stud/joist behind it if you can find one; if not, use a fine-thread hollow-wall fixing that won't crack the old plaster as it tightens.