TC-06Fix the trunking base to the wallOn solid brick or block, drill 6mm holes and insert red plastic wall plugs, then screw the trunking on every 300-400mm with 30mm screws. On plasterboard over timber studs, find the stud centre with your detector and screw straight in with a 25mm woodscrew; between studs, rely on the trunking's self-adhesive backing, or a light-duty plasterboard fixing if you want a mechanical fix. On plasterboard over metal studs, never use a wood screw — it strips straight through 0.5mm steel — use a self-drilling metal-stud fixing, or just the self-adhesive pads, since trunking is light and doesn't pull on the wall. On dot-and-dab, if you want a screw fix rather than adhesive, use a fixing long enough to pass through the board and adhesive dabs and bite into the masonry behind, typically 50-60mm; otherwise self-adhesive pads are fine for something this light. On lath and plaster, avoid heavy drilling — use fine screws into a lath if you can find one, or stick with adhesive pads to avoid cracking old plaster, testing an unseen patch first.