Fix a loose shelf bracket on a solid brick or block wall

Refit a loose shelf bracket safely by removing old fixings, checking for cables, then re-drilling and re-plugging into solid brick or block.

FB-01Clear the shelf and check the damageTake everything off the shelf and set it aside. Wobble the bracket by hand to see how loose it is, and look for cracked plaster or a hole that's gone oversized around the screws. This tells you whether you can reuse the existing holes or need to move along and start fresh.

FB-02Check for cables and pipes, and know how to shut things offBefore you drill anything, run a detector over the wall where the new holes will go. Cables and pipes can run almost anywhere, not just in the 'safe zones', so treat the detector as a first check, not proof — a cable in metal conduit or buried deep can still be missed. Find your stopcock now, usually under the kitchen sink, and check it turns freely so you can shut off water fast if you hit a pipe. If you have any doubt at all, isolate the relevant circuit at the consumer unit before drilling near a socket or light.

1 each · Cable and pipe detector

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FB-03Remove the old bracketUndo the screws holding the bracket to the wall and lift it off. Keep the screws and plugs to one side so you can compare them to new ones later. If a plug stays stuck in the wall, dig it out with a small screwdriver rather than trying to drill through it.

FB-04Fill any damaged holes and let them dryIf the old holes are cracked, chipped or too wide for a fresh plug, push in a little filler and smooth it flush. Leave it to go fully hard before drilling nearby — usually a few hours, check the tub for the exact time. If the holes are still sound, you can skip this and reuse them.

1 each · Ready-mixed filler (small tub)

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FB-05Mark and drill the new fixing holesHold the bracket in place, level it with a spirit level, and mark through the screw holes with a pencil. If you're moving the position even slightly to avoid old damage, re-check for cables and pipes at the new spot first. Use a masonry bit matched to your plug size — typically 6mm or 7mm — and drill 5mm deeper than the plug length so it seats fully.

1 each · Masonry drill bit, 6mm

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1 each · Spirit level, 300mm

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FB-06Fit the wall plugsBlow or vacuum the dust out of each hole so the plug can grip properly. Push a wall plug into each hole until it sits flush with the surface, tapping gently with the handle of a screwdriver if it's stiff. Don't force an oversized plug into a hole that's gone loose — drill a fresh hole nearby instead.

4 each · Rawlplug wall plugs, red (6mm)

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1 each · Small vacuum or dust brush

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FB-07Screw the bracket back on and check it's levelLine the bracket up with the plugs and drive the screws in firmly, but stop once the bracket sits tight against the wall — overtightening can crack the plug or the surrounding plaster. Recheck with the spirit level once both sides are fixed. Give the bracket a firm tug to make sure it's solid before loading it.

4 each · Wood screws, 50mm

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1 each · Screwdriver or drill/driver

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FB-08Reload the shelf and tidy upPut the shelf back on the bracket and reload it gradually, checking nothing shifts. Wipe down any dust with a damp cloth and vacuum the floor below. Bin the old, damaged plugs rather than reusing them.

1 each · Damp cloth

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