Symptoms
- Creaking sound on specific steps
- Squeak happens on the same step every time
- Step feels slightly loose or flexes underfoot
- Sound comes from underneath the staircase
Likely causes
- CommonTread rubbing against the riser or stringerWood shrinkage over years opens small gaps that let parts rub together.
- CommonLoose wedge or glue block under the stair from belowMany stairs use wood wedges to lock treads in place, and these can loosen.
- PossibleNails backing out of the treadRepeated foot traffic works nails loose over time.
- Less commonStructural movement in the stair stringerSettling can shift the whole staircase slightly.
What to do
- Identify the exact squeaky step and press down at different spots on the tread to find where it moves.
- If you have access underneath the stairs (open staircase or storage area), look for loose wedges or glue blocks and re-glue or re-tap them into place.
- From above, drive a trim-head screw at an angle through the tread into the riser below it, in an inconspicuous spot near the back.
- For a squeak at the front edge (nosing), a screw driven up at an angle from underneath into the tread can help if accessible.
- If nails are visibly popped, remove them, apply wood glue in the hole, and replace with a screw instead.
- Sprinkle a small amount of graphite powder into any visible tread-to-riser gap as a quick, low-effort fix.
- Test each treated step by walking on it before moving to the next.
Tools and parts
- Drill/driver
- Hammer
- Wood glue
Trim-head wood screwsSearch: “trim head wood screws stair repair”
When to call a pro
Call a carpenter if the stairs feel structurally loose or several steps flex noticeably, since that may involve the stringer itself.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.