Common Furniture Repair Mistakes That Cost You Twice

Most furniture damage is genuinely repairable. The trouble is that the wrong repair makes the eventual right repair much harder. A friend recently asked me to look at a chair he had tried to fix; the original loose joint was now a much larger mess of dried adhesive, gouged wood, and a misaligned arm. The repair he could have done in twenty minutes had turned into a repair that needed a professional and a small fee.

Here are the most common mistakes I see, and the right approach for each. Knowing what not to do is, in my experience, more valuable than knowing what to do, because the wrong move is usually irreversible.

Mistake one: using the wrong glue

Furniture has been glued for centuries, mostly with hide glue and (for the last several decades) PVA wood glue. Both work for almost every repair. They are the right answer for almost every situation.

The wrong answers, in order of how badly they harm a repair:

Super glue (cyanoacrylate). Too brittle for any joint that flexes under load. It will hold initially and then crack out over weeks of use, leaving a hardened mess on both surfaces that resists future re-gluing.

Hot melt glue. Cannot withstand the temperature range a house experiences (much less direct sunlight or radiator heat). Softens, slips, and fails. Sets quickly, which means errors are locked in.

Epoxy. Too rigid and too messy for most joints. Useful for non-wood-to-wood bonds (wood to metal, for example) but overkill for normal wood joints.

Contact adhesive. Works well for bonding flat surfaces (veneer, laminate) but wrong for structural joints. Cannot be repositioned after contact, which is unforgiving.

For any wood-to-wood joint, use PVA wood glue. For antiques, use traditional hide glue. The right tool is almost always the simplest one.

Mistake two: skipping the prep

The single most common reason re-glued joints fail is that the old glue was not removed from the joint surfaces. New glue does not bond to dried old glue. The new glue bonds to the old glue, the old glue is not bonded to anything fresh, and the joint fails again within weeks.

Every joint repair begins with scraping the old glue off both surfaces until you see bare wood. This is the step that makes the difference between a temporary fix and a lasting one. See our re-gluing guide for the proper sequence.

Mistake three: sanding to fix scratches

Sanding a small scratch out of a finished wood surface almost always makes the situation worse. You remove the finish in a small patch, expose lighter wood underneath, and create a visibly different texture from the surrounding surface that you then cannot easily blend back in.

The correct approach for scratches depends on the depth of damage. For light scratches, polish or wax. For medium scratches, wax sticks or touch-up pens. For deep scratches, filler and grain reconstruction. Only fully refinish the surface as a last resort, and if you do refinish, do the whole panel, not just the damaged area. See our scratched wood guide for the right techniques.

Mistake four: covering damage with paint

Painting over damaged furniture seems like a clean fix and is, sometimes, the right answer. Often it is the wrong one. Paint sticks to clean dry stable surfaces; it does not stick well to oily surfaces, polished surfaces, or damp wood. Painting over unsuitable furniture results in paint that flakes off within months, leaving an ugly patchy surface that is now harder to refinish properly.

If you want to paint a piece of furniture (which is a legitimate design choice), prepare it properly: clean thoroughly with detergent, sand lightly to give the new paint something to grip, prime with a good primer, then apply your top coats in thin layers. The job is more work than it looks, but the result lasts.

Painting over good wood that just needs cleaning and oiling is also a mistake of taste and value. Some pieces look much better with a refreshed natural finish than with paint, and reverting from paint back to natural wood is significantly harder than going the other way.

Mistake five: using metal where wood is appropriate

Reaching for a metal corner brace, an L-bracket, or a long screw when the original construction was joinery looks like it strengthens the repair but often weakens it. Metal hardware concentrates stress at the screw points, which can split wood. It changes the load path of the joint, which can cause failure elsewhere. And it almost always looks awful, even hidden underneath.

The right approach for most joinery repairs is to re-create the original wood joint properly. Re-glue tenons. Tap in new dowels. Plug stripped screw holes with new wood and re-screw with the same screw. Metal brackets are appropriate only when the original construction was metal-fastened, or when the original wood structure cannot be repaired any other way.

Mistake six: applying force when something does not fit

If a joint resists assembly, do not hammer it harder. Stop. Investigate why. Almost always, something is misaligned, an old piece of glue is in the way, or the joint geometry has shifted. Forcing it usually breaks something else.

The same applies to screws that will not drive (a damaged thread, a knot in the wood, a screw too long), drawers that will not close (a piece of debris, a swollen edge), and furniture that does not assemble cleanly (a piece of hardware oriented wrong, a dowel misaligned). Force is the most common cause of small repairs turning into large ones.

Mistake seven: treating all wood the same

Furniture wood varies enormously. Solid hardwood (oak, walnut, mahogany) is dense and strong; it takes screws well, holds joints firmly, and is forgiving. Softwood (pine, fir) is gentler; it splits more easily, holds screws less well, and needs predrilled holes.

Particle board and MDF behave entirely differently from solid wood. They cannot be glued the same way, do not take screws as well, and cannot be sanded down to bare material because there is no continuous grain underneath. Repairs to engineered wood materials require different techniques and different products.

Identify what your furniture is made of before you choose your repair approach. The wrong approach for the wrong material is the most common single cause of failed amateur repairs.

Mistake eight: doing the work in the wrong order

Some repairs need to happen in a specific sequence. Clean before you glue. Glue before you screw. Fill before you sand. Sand before you stain. Stain before you finish.

Doing things out of order can mean re-doing them entirely. Glueing before cleaning means the new glue traps old dirt under the bond. Staining before filling means the filler stands out as a different colour after staining.

If you are unsure about a repair, read through the whole process before you start, gather all the materials, and plan the sequence. Half an hour of preparation usually saves several hours of fixing avoidable mistakes.

For the right approach to a particular repair, see our pieces on tightening wobbly chairs, fixing scratched wood, and re-gluing loose joints.