Replace a broken bed slat

Measure, remove, and replace a single broken bed slat so the base supports the mattress evenly again.

BS-01Clear the bed and find the broken slatStrip the bedding and lift the mattress off, or prop it against a wall so you can see the base clearly. Find the broken or cracked slat and check whether it's a flat wooden slat or a curved sprung slat (sprung slats have a slight bow and sit in plastic end holders). Check either side of it too — a slat often cracks because a neighbouring one has already failed and shifted the load.

BS-02Measure the broken slatMeasure the full length, width and thickness of the broken slat with a tape measure. If it's a sprung slat, note the curve — lay it flat on the floor and measure how far the centre lifts off the ground. Take a photo of how it sits in its end holders, since some frames use notched ends and others use plain flat ends.

BS-03Buy a matching replacementMost bed manufacturers sell exact replacement slats by model — check the frame for a brand name or model sticker, usually on the headboard rail or a side rail, and search for it online first. If you can't match it exactly, buy a generic sprung or flat slat close to the same length, width and thickness from a DIY shop or online. A slightly longer slat can be trimmed down with a hand saw; a slat that's too short or too thin will flex and fail again.

1 each · Replacement bed slat (matched or generic)

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2 each · Plastic slat end caps (if yours are worn or cracked)

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BS-04Remove the broken slatLift the broken slat out of its end holders — most just clip or rest in place with no fixings. If yours are screwed to the side rails, undo the screws and keep them; you'll likely reuse them. Check the end caps or holders themselves for cracks and replace any that are damaged, since a good slat in a broken holder will fail again.

BS-05Trim the new slat if neededIf the replacement is longer than the original, mark the correct length using the old slat as a template and cut it with a hand saw. Sand the cut end lightly so it seats cleanly in the end holder. Skip this step if the new slat is already the right size.

1 sheet · Sandpaper, medium grit

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BS-06Fit the new slatClip or seat the new slat into its end holders the same way the old one sat, matching the curve direction if it's a sprung slat (the bow should arch upward). If your frame uses screws, refit them into the same holes without overtightening — bed slats only need light pressure. Press down along the slat to check it sits flush with its neighbours and doesn't rock.

BS-07Test the repairPress down firmly on the new slat with both hands, then sit on that part of the bed to check it takes weight without shifting or creaking loudly. Check the slats either side haven't been knocked out of their holders. If anything feels loose, reseat it before putting the mattress back.

BS-08Tidy upPut the mattress and bedding back. Wrap the broken slat and any old screws or caps for disposal, keeping any sharp splintered ends covered so they don't catch on the bin bag. Vacuum around the base where sawdust or debris may have fallen.

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