RB-05Drill and fix the brackets for your wall typeIn solid brick or block, drill 6mm holes to 40mm deep, insert plastic wall plugs, and drive in the bracket screws. In a timber stud reveal, screw a 4x40mm wood screw straight into the centre of the timber upright — no plug needed. In a metal stud reveal, use a self-drilling metal-stud fixing or a screw-and-toggle rated for 0.5mm steel; never use a plastic plug or an ordinary wood screw, as they strip straight through. On dot-and-dab plasterboard over masonry, use a fixing long enough to pass through the plasterboard and adhesive dabs into solid masonry behind — typically 60-75mm. On lath and plaster, aim for a lath if you can find one, or use a spring toggle sized for the blind's weight, since the old lime plaster crumbles under ordinary plugs. A roller blind is light, so a correctly rated hollow-wall fixing is normally enough — only add a timber noggin or pattress behind metal studs or plasterboard if the recess is very wide or the blind unusually heavy.