Hang a heavy picture or large canvas on a dot-and-dab plasterboard wall

Learn to find a safe, strong fixing point and hang a heavy picture or canvas level and secure, whatever the wall.

HPD-01Gather your tools and materialsGet everything together before you start so you're not hunting for a bit halfway through. You'll need a cable and pipe detector, a drill with masonry and wood bits, a spirit level, tape measure, pencil, screwdriver and a dust sheet. Lay the dust sheet under the work area to catch dust and offcuts.

1 each · Cable and pipe detector

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1 each · Spirit level (600mm)

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1 each · Drill (with hammer action for masonry)

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1 each · Dust sheet

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1 each · Pencil and tape measure

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HPD-02Work out what your wall is made ofTap the wall along the line you want to fix into. A solid, dead sound all the way along usually means brick or block. A hollow sound that changes as you move along, with screw heads in a line every 400-600mm, usually means plasterboard on timber studs. If a magnet sticks lightly to screw heads but not the frame itself, and a small pilot hole brings out fine grey steel swarf rather than wood dust, you've got metal studs. Dot-and-dab feels hollow everywhere but a pilot hole goes through plasterboard, then air, then hits solid masonry a few centimetres in. Lath and plaster (usually pre-1930s houses) sounds uneven and slightly springy, with a bumpy, uneven plaster surface.

HPD-03Check your stopcock and plan for safety before drillingCables and pipes can run almost anywhere in a wall, not just in the 'safe zones' you might have read about. A detector helps but can miss cables that are deep, in metal conduit, behind metal-backed plasterboard, or confused by a metal stud frame — so always assume something might be there and drill carefully regardless. Before you start, find your stopcock (usually under the kitchen sink) and check it turns, so you can shut the water off fast if you hit a pipe. If you have any doubt at all about what's behind the wall, isolate the circuit at the consumer unit before drilling.

HPD-04Mark and level your fixing pointsDecide on the height for the centre of your picture — a common guide is about 1450mm from the floor to the centre. Hold the picture up (or measure its hanging wire/D-rings) and mark where each fixing needs to go. Use the spirit level to make sure your marks are level with each other before you drill anything.

HPD-05Choose the right fixing for your wall typeSolid brick or block: drill a 7mm hole, insert a heavy-duty wall plug, and use a No.8 screw at least 50-60mm long, going at least 30mm into solid masonry. Plasterboard on timber studs: skip the plug and drive a 50mm wood screw straight into the centre of the stud, with a 2mm pilot hole first. Plasterboard on metal studs: never use a plain wall plug or wood screw, as it strips straight through 0.5mm steel — use a self-drilling metal-stud fixing or a toggle-type hollow-wall anchor rated for the weight; a heavy picture or canvas that pulls forward as it's adjusted needs a timber noggin or pattress fitted between the studs, or a fixing through to masonry behind, not a bare metal stud. Dot-and-dab: the plasterboard sits on an air gap (often 20-50mm) in front of the real masonry wall, so use a long fixing — typically a 75-100mm frame fixing or long screw and plug — that passes through the board and the gap and still gets at least 30mm into solid masonry behind. Lath and plaster: the plaster is often thin and can crumble, so use a spring toggle or a screw driven into a solid lath or timber batten, and avoid heavy hammering.

4 each · Heavy-duty wall plugs (masonry)

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4 each · No.8 screws, 50-60mm

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2 each · Metal-stud toggle fixing

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2 each · Long frame fixing for dot-and-dab (75-100mm)

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2 each · Spring toggle fixing (for lath and plaster)

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HPD-06Drill the fixing holesRun your detector over the marked spots one more time before you drill, and still treat the wall as if something's there — proceed carefully rather than relying on the detector alone. For dot-and-dab, drill slowly through the plasterboard first; if you hit an air gap rather than the dab, move the hole slightly sideways until you feel solid masonry, since dabs aren't continuous. For solid masonry, drill to the full depth needed for your plug in one steady pass rather than forcing it. Stop immediately and check with your stopcock or consumer unit if you feel any unexpected resistance, smell burning, or see anything unusual coming out of the hole.

HPD-07Fit the fixingsPush or tap the plug or toggle fully into the hole, then drive the screw in until it's snug — don't overtighten, as this can crack plaster or crush plasterboard. For toggle fixings behind dot-and-dab or plasterboard, follow the fixing's instructions, as some need the toggle folded flat before it goes through the hole. Wipe away any dust around the hole with a damp cloth once you're done.

HPD-08Hang the picture and check it's levelLift the picture onto the fixings carefully, keeping your hands under it until you're sure it's seated properly. Step back and check it's level with your spirit level, adjusting the fixings slightly if needed. Give it a gentle push and pull test to make sure the fixing feels solid before you let go completely.

HPD-09Tidy upFold up the dust sheet, shaking any debris outside or into a bin. Vacuum any remaining dust from the floor and skirting below the picture. Give the wall a final wipe if there's any plaster dust left on the surface.

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