How to Fix Wobbly Furniture: Tables, Chairs and Shelves
Why furniture wobbles and how to fix it step by step: tightening joints, levelling uneven floors, shimming legs and repairing stripped holes.
A wobbly table or shaky bookcase is annoying and often fixable in minutes. The trick is to work out why it moves before reaching for a screwdriver. Wobble usually comes from one of four causes: loose fixings, an uneven floor, a frame that is out of square or worn holes.
Step 1: Diagnose
Test the floor
Move the piece to a different spot or slide a folded card under the short leg. If the wobble changes or disappears, the floor is the problem, not the furniture.
Press and listen
Push the top gently from different directions. Creaking at a joint tells you where the movement is. Look for gaps where parts meet.
Check for twist
Measure diagonals on boxes and frames. If the two are different, the piece is out of square and needs loosening and re-aligning.
Step 2: Tighten properly
- Go round every bolt, screw and cam lock, tightening in a logical order.
- Use the right tool. A loose-fitting screwdriver slips and does not turn fixings fully.
- Do not over-tighten. If a fixing keeps turning without gripping, the hole is stripped.
On flat-pack, loosen all fixings slightly first so the frame can settle square, then tighten from the bottom up.
Step 3: Level the piece
Adjustable feet
Many pieces have screw-in feet. Adjust them until the piece sits firmly, using a spirit level on the top.
Shims
Thin plastic or wooden shims, or felt pads of varied thickness, go under the short leg. Cut them to fit and keep them in place with a dab of adhesive.
Floors and thresholds
Very uneven floors or sloping rooms may need more than a shim. Check whether the piece should be moved to a flatter area.
Step 4: Repair worn or stripped holes
A fixing that spins freely has lost its grip. Options:
- Fill the hole with a hardwood dowel or wooden matchsticks and wood glue, trim flush and let it set, then re-drill a pilot hole.
- Use a thicker or longer screw only if the manufacturer allows it and material is thick enough.
- Use wood filler for small damage, then re-drive the screw after drying.
- On chipboard, use a specialist repair plug or insert designed for the material.
Leave glue to dry fully before reloading the furniture.
Step 5: Reinforce
For older chairs or tables with loosened joints:
- Add corner brackets or blocks to inside corners.
- Glue joints that have opened up, clamping until dry.
- Add a stretcher or cross brace if the design allows.
Preventing wobble
- Build on a level surface.
- Tighten fixings in two stages: loosely first, then fully.
- Recheck after a few weeks of use, since joints settle.
- Avoid dragging furniture, which stresses joints. Lift to move.
When to call for help
If a frame is damaged, split or missing parts, or the piece is heavy and awkward, a handyperson can fix or rebuild it. Tell the provider what is wrong and send photos. See repairing sticking or loose drawers for another common fix, and how to compare offers when asking for quotes.
A quick diagnosis table
| What you notice | Probable cause | First fix |
|---|---|---|
| Rocks diagonally | Uneven floor | Adjustable feet or shims |
| Sways side to side | Loose joints or cam locks | Re-tighten in a cross pattern |
| Creaks when leaned on | Dry joint or loose back panel | Check and refit the back |
| One leg short | Frame slightly twisted | Loosen all, square, retighten |
| Screws spin without gripping | Stripped hole | Repair the hole |
A worked example: a wobbly bookcase
A tall bookcase sways when you add books. First, remove the books. Check the floor with a spirit level, then loosen each fixing a half-turn, push the frame square and re-tighten. Inspect the back panel, which gives much of the stiffness; if the nails have pulled through, replace with small screws or fresh pins. Finally, anchor the top to the wall (see anchoring bookcases and tall furniture).
Repair tricks for tired holes
- Insert a wooden dowel or matchsticks with wood glue, let it set, then redrill.
- Use a slightly longer or thicker screw only if the panel is thick enough.
- Use repair plugs or threaded inserts designed for chipboard.
- Replace missing cam fittings with a matching size.
What not to do
Do not force a twisted frame flat by tightening hard, and avoid stuffing folded paper under legs permanently; it compresses and moves. If a joint has split or the board has crumbled, a repair may not hold, and a replacement part or help from a competent handyperson will be a better choice.
Checking after the fix
Once the piece feels steady, test it with the load it will carry. For a table, lean on each corner; for a shelf, load it gradually; for a chair, sit and shift your weight. Recheck bolts after a week of use.
Frequently asked questions
Why does a new table wobble?
Common causes are uneven floors, fixings not fully tightened or legs set slightly out of square. Check the floor first, then retighten and measure diagonals.
Can I use wood glue on flat-pack?
For repairs, yes, in stripped holes or opened joints. During a normal build it is not recommended, as it prevents later dismantling and correction.
Are plastic shims a long-term fix?
They are fine for uneven floors. If the wobble comes from the piece itself, fix the joints or frame instead of relying on shims.