Put up a bay window curtain pole on a dot-and-dab plasterboard wall

Fit a three-part curtain pole across a bay window, checking your wall type and drilling safely before fixing it securely.

BW-01Plan the pole and bracket positionsMeasure each section of the bay separately, then check your curtain pole kit is designed for bay windows with corner connectors. Check the label for a maximum weight rating and compare it to your curtains — heavy lined curtains need a heavier-duty pole. Decide where each bracket goes: end brackets close to each corner, and a centre bracket on any span over 1.2m to stop the pole sagging.

1 set · Bay window curtain pole kit with corner connectors

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1 each · Centre support bracket

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1 each · Tape measure

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1 each · Pencil

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BW-02Work out what your wall is made ofRun a stud detector or a magnet along the wall in a horizontal line where you plan to fix. A magnet that grabs onto screw heads at regular spacing tells you there's a stud wall — metal studs are common in flats, new builds, and anything refitted since the 1990s. Tap the wall: a dull, solid sound usually means masonry or dot-and-dab plasterboard on masonry, while a hollow drum sound between solid points means a stud wall. Drill a small 3mm test hole in an inconspicuous spot — fine timber dust means a timber stud, grey metallic swarf means a metal stud, and masonry dust after passing through 12.5mm of board means dot-and-dab over brick or block.

1 each · Stud and cable detector

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1 each · 3mm drill bit

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BW-03Check for cables and pipes before you drillCables and pipes can run almost anywhere in a wall, not just the standard safe zones, so scan every fixing point with your detector — but still treat the wall as if something is there even after a clear scan, because detectors miss deep cables, armoured cable and anything behind metal-backed board. Find your stopcock now, usually under the kitchen sink, and check it turns freely so you can shut off the water fast if you hit a pipe. If you have any doubt at all, isolate the relevant circuit at the consumer unit before drilling, and turn off the water at the stopcock before cutting into anything that could carry it.

BW-04Mark bracket heights and positionsHold the pole kit against the wall and mark the height you want above the window, checking it's level with a spirit level rather than by eye. Mark each end bracket position first, then the centre bracket, checking corner-to-corner symmetry by measuring from the window frame on both sides. Double-check every mark before you drill — a bracket that's 10mm out at one end shows badly across a whole bay.

1 roll · Masking tape

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BW-05Fix into dot-and-dab plasterboardThis is the method for most bay windows: plasterboard is stuck to the brick or block behind with dabs of adhesive, leaving an air gap of anywhere from 10mm to 50mm. Drill a pilot hole right through the board and gap into the masonry, and check the total depth with the drill bit or a piece of wire so you know how long a fixing you need. Use a long wall plug rated for dot-and-dab (60-80mm) and a matching long screw (70-100mm), pushing the plug fully into the masonry before driving the screw through the bracket and into it — a normal plug will just spin in the air gap.

1 pack · Long dot-and-dab wall plugs (pack of 10)

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1 pack · Long screws 70-100mm (pack)

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1 each · Masonry drill bit 6-8mm x 100mm

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BW-06If the bay is solid brick or block with no dot-and-dabSome older bay windows are solid masonry all the way to the surface, with no plasterboard skim on dabs. Drill a pilot hole with a masonry bit matching your wall plug size — typically a 6mm bit for a 6mm plug — to a depth of 40-50mm, and blow out the dust before pushing the plug in flush. Use a screw long enough to pass through the bracket and reach the full depth of the plug.

1 pack · Masonry wall plugs 6mm (pack)

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1 pack · Screws 50-60mm (pack)

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1 each · 6mm masonry drill bit

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BW-07If you find a timber studFix directly into the centre of the stud with a wood screw — this gives a solid, reliable fixing for a curtain pole bracket. Drill a pilot hole about 2mm narrower than the screw to stop the timber splitting, then drive a 50-60mm wood screw straight in. Never use a wall plug in solid timber — it won't grip and the fixing will fail.

1 pack · Wood screws 50-60mm (pack)

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BW-08If you find a metal studA metal stud is a thin steel channel, usually about 0.5mm thick — an ordinary wood screw or plastic plug will strip straight through it. Use a self-drilling metal-stud screw for a light pole, or a toggle-type hollow-wall anchor rated for the actual pull of your curtains for anything heavier. A metal stud will not hold a heavy pole, a long curtain arm, or anything tugged as it's used — if that's your situation, open the board and fit a timber noggin between the studs, or fix through to the masonry behind if there is any.

1 pack · Self-drilling metal-stud screws (pack)

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1 pack · Toggle-type hollow-wall anchors, rated (pack)

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1 length · Timber noggin 38x50mm

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BW-09If you find lath and plasterLath and plaster is old, thin timber strips under a lime plaster skim, and it's fragile — heavy-handed drilling cracks the plaster around the hole. Locate the timber laths or the stud behind them with your detector, drill a pilot hole through the plaster only where a lath or stud sits, and use a longer wood screw (60-70mm) to get a solid grip in the timber, not just the plaster. Support the plaster with masking tape over the hole as you drill to stop it crumbling.

1 pack · Wood screws 60-70mm (pack)

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1 roll · Masking tape

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BW-10Fit the brackets and assemble the poleScrew each bracket to its marked position, starting with the end brackets, then the centre support. Fit the pole sections into the corner connectors and rest them on the brackets, checking the whole run with a spirit level before you tighten anything fully. Adjust a bracket slightly if one corner sits proud, then lock everything down.

BW-11Hang the curtains and test the poleSlide the curtain rings or hooks onto the pole and hang the curtains, checking they run smoothly around each corner connector. Gently pull the curtains fully open and closed a few times to check every bracket holds firm and nothing flexes away from the wall. If any bracket moves, stop and refit it with a stronger fixing before using the curtains normally.

BW-12Tidy upVacuum up all drilling dust and any bits of masonry or plaster, especially from the windowsill and floor. Wipe down the wall around each bracket and check the finish looks neat. Store any leftover fixings and offcuts of pole in case you need them later, and give your drill and detector a quick wipe down before putting them away.

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