Symptoms
- Chair wiggles side to side when sitting
- Creaking or cracking sound under weight
- Visible gap where a leg meets the frame
Likely causes
- CommonDried-out or failed wood glue in jointsOld hide or wood glue becomes brittle and loses its hold over years.
- CommonLoose corner blocks or bracesMany chairs use triangular blocks under the seat that can work loose.
- PossibleWorn dowels or mortise-and-tenon jointsRepeated stress can round out the wood joint itself, not just the glue.
- Less commonSplit wood at a jointOverloading or a hard impact can crack the wood around a joint.
What to do
- Turn the chair upside down and identify which joint moves when you wiggle each leg.
- Tighten any visible screws in corner braces or metal brackets first, since this is the fastest fix.
- If a wood joint is loose, gently work it apart, scrape out old glue, and clean both surfaces.
- Apply fresh wood glue into the joint and reassemble, using clamps or a ratchet strap to hold pressure while it cures.
- Wipe away excess glue and let it dry fully per the glue's instructions (usually 24 hours) before using the chair.
- For split wood, glue and clamp the crack, and reinforce the joint with a small screw once the glue is set.
Tools and parts
- Wood glue
- Clamps or ratchet strap
- Screwdriver
- Chisel or scraper
Wood glueSearch: “wood furniture glue”
Corner brace bracketsSearch: “chair corner brace repair kit”
When to call a pro
For valuable or antique chairs, a furniture restorer can re-glue joints without damaging the finish or original wood.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.