How to Fix a Stripped Screw Hole in Wood
The correct repair method depends on the type of wood, the size of the screw, and how much weight the fixing needs to support. This guide covers every situation, from a quick toothpick repair to a full timber insert, so you can choose the right method for the job.
A stripped screw hole is one of those repairs that people either ignore — and watch get worse — or over-engineer with unnecessary products when a simpler method would have served perfectly well. The truth is that the correct approach depends entirely on the context: the size of the stripped hole, the type of timber, and whether the screw is carrying any real structural load or simply holding something light in place.
Drive a screw back into a hole that has lost its thread purchase and it will spin indefinitely, gripping nothing and weakening the surrounding wood fibre with every rotation. Left unrepaired, the hole grows larger, the fixing fails entirely, and what began as a minor problem becomes a proper piece of remedial joinery work. The methods in this guide address every level of severity, from the kind of minor stripping that happens when a hinge is over-tightened, right through to a hollow, blown-out hole in a structural timber that needs rebuilding from scratch.
A toothpick repair is perfectly adequate for a cabinet hinge or a lightweight shelf bracket. It is completely inadequate for a structural deck board fixing, a stair baluster, or anything subject to repeated lateral force or vibration. Choose your repair method based on what the screw actually needs to do, not just on convenience.
A screw hole becomes stripped when the wood fibres surrounding the thread are compressed, sheared, or pulled away to the point where the thread can no longer find purchase. This happens for several distinct reasons, and identifying the cause helps you avoid the same problem recurring after the repair.
The most frequent cause is over-driving — running a screw too far into the timber until the head bottoms out and the driver keeps spinning, chewing the surrounding wood. This is particularly common when using a power drill without a torque-limiting clutch, or when using the wrong bit size for the screw head. Soft timbers such as pine, MDF, and chipboard are especially vulnerable because the wood fibres compress easily, giving false resistance before suddenly giving way.
A second common cause is repeated removal and replacement of the same screw over many cycles, which gradually enlarges the hole and weakens the thread engagement. This is typical of furniture fixings, cabinet hinges, and shelf brackets that are adjusted or repositioned over time. A third cause is using a screw that is simply too short or too fine for the timber density, meaning it never had adequate purchase to begin with.
Understanding which of these caused your stripped hole matters because it determines how likely the same hole is to fail again, and whether upsizing to a slightly larger screw would solve the problem entirely without any additional repair work.
| Cause of Stripping | Typical Scenario | Best Repair Method | Risk of Recurrence |
|---|---|---|---|
| Over-driving with power drill | Hinge, bracket, shelf fitting in softwood | Toothpick or matchstick repair | Low if torque is controlled |
| Repeated screw removal over time | Cabinet hinges, furniture fittings | Wooden dowel plug or timber insert | Low with correct repair |
| Screw too short or gauge too fine | Structural timber, decking, joinery | Upsize screw or dowel plug then re-drill | Low if correct screw specified |
| MDF or chipboard blown out | Flat-pack furniture, kitchen units | Epoxy filler or threaded insert | Medium — substrate is inherently weak |
| Structural timber with heavy load | Deck boards, stair components, structural joints | Timber insert or relocation of fixing point | Low with correct insert and screw specification |
Before reaching for any product or tool, answer two questions: what is this screw actually doing, and how badly is the hole stripped? These two factors determine everything.
This is the fastest and most widely used repair for light-duty screw holes in solid timber and plywood. It works by packing the oversized hole with fresh wood fibre, giving the screw thread something new to bite into. When done correctly it is genuinely reliable for low-load applications and costs almost nothing.
You will need wooden toothpicks or flat matchsticks — both work, though round toothpicks are easier to work with in most hole sizes. You will also need wood adhesive such as PVA glue or a similar woodworking adhesive, a sharp craft knife or chisel, and your screw plus the appropriate screwdriver or drill bit. Avoid using cocktail sticks made from bamboo or synthetic material as these do not compress against the screw thread in the same way as wood.
Dip two or three toothpicks in PVA wood glue and push them firmly into the stripped hole. Pack them in parallel with the direction of the original screw, as tightly as the hole will accept. You are not trying to fill the hole entirely — you are adding enough fresh wood fibre that the screw has something to compress against as it drives in.
If the toothpicks go in loosely, add another one. If the hole is particularly large, snap the toothpicks to different lengths so that you can pack them at varying depths. The goal is a hole that feels dense and slightly resistant when you prod it with a fingertip, not a hole that still has clear space down the centre.
Allow the PVA adhesive to cure for at least 30 minutes before driving the screw. In a cold or damp workshop environment, allow a full hour. Once cured, snap the toothpicks flush with the surface — or trim them with a sharp craft knife if precision matters — and drive the original screw back in at a slow, controlled speed. You should feel the screw biting into the packed wood fibre rather than spinning freely. Maintain steady, even pressure without excessive torque. If you are using a power drill, set the clutch one or two settings lower than you would normally use for this screw size.
- Minimum two or three toothpicks used to ensure adequate packing density
- PVA glue applied generously before insertion, not as an afterthought
- Toothpicks left proud of the surface until glue is fully dry
- Screw driven slowly on first pass to avoid re-stripping the packed fibre
- Torque limited on power drill to prevent over-driving
For a door hinge that has been stripped, use four to five toothpicks rather than two or three, and allow the glue a full hour to cure before rehang. Door hinges experience significant shear and peel forces every time the door is opened. The extra packing density and curing time are what keep the repair lasting for years rather than weeks.
The dowel plug repair is the professional standard for medium to heavy-duty fixings in solid timber. It completely replaces the damaged wood fibre in the stripping zone with a solid timber insert, allowing you to re-drill a clean pilot hole and drive a fresh screw into virgin material. It takes longer than the toothpick method but provides a far stronger, more permanent result.
Select a drill bit that matches a standard dowel diameter — 6mm, 8mm, or 10mm are the most common sizes available from any UK timber merchant or DIY supplier. Use a sharp, clean spade or lip-and-spur bit for the cleanest entry. Drill straight into the centre of the stripped hole to a depth of approximately 20 to 25mm, or slightly deeper than the original screw penetration. Keep the drill square to the surface — a misaligned hole will cause the dowel to sit at an angle and make re-drilling the pilot hole awkward.
Apply a generous coating of PVA wood glue to the inside surface of the drilled hole and to the outside surface of the dowel. Tap the dowel into the hole with a mallet — it should be a snug fit with slight resistance, not so tight that it cracks the surrounding timber, but not so loose that it wobbles. Leave the dowel proud of the surface by 5 to 10mm at this stage. Allow the glue to cure for a minimum of one hour, and ideally two hours in normal workshop temperatures. In cold conditions below 10 degrees Celsius, allow at least three hours.
Once the glue has fully cured, use a sharp chisel and mallet — or a flush-cut saw if one is available — to pare the projecting dowel flush with the surface. Work from the outside edge of the dowel towards the centre to avoid splitting the surrounding timber. Once the dowel sits flush, re-drill your pilot hole in the correct position for the screw. Use a bit that is 70 to 75 percent of the screw shank diameter. Drive the screw at controlled speed and the result is a fixing with pull-out strength equivalent to a new hole in undamaged timber.
- Drilled hole kept square to the face of the timber throughout
- Glue applied to both the hole interior and the dowel surface, not just one
- Full cure time observed before trimming and re-drilling
- Pilot hole re-drilled at 70 to 75 percent of screw shank diameter
- Dowel trimmed flush before re-drilling to prevent chipping or tear-out
Driving a screw directly into a glued dowel without a pilot hole is one of the most common errors in this repair. The dowel is solid, dry timber and will split if a screw is forced in without guidance. The split may not be immediately visible but it significantly weakens the bond between the dowel and the surrounding material. Always re-drill the pilot hole before driving.
Threaded inserts are the correct solution where a screw fixing will be removed and replaced multiple times, or where the substrate — particularly MDF, chipboard, or particle board — cannot hold a wood screw reliably in the long term. The insert creates a permanent metal thread within the timber that the screw engages with rather than biting into wood fibre directly. The result is a fixing that can be driven and removed repeatedly without degradation.
Timber inserts are available from any good UK fixings supplier in a range of internal thread sizes to suit standard screw gauges. The most common sizes for furniture and cabinetry work are M4, M5, and M6. For structural applications or exterior use, larger inserts in M8 or M10 are appropriate.
Check the manufacturer's specification for the insert you are using. Every threaded insert specifies a required hole diameter — do not guess this measurement. Using a hole that is too small will crack the surrounding timber when the insert is driven in. Using a hole that is too large will result in the insert spinning rather than gripping. Drill the receiving hole to the correct depth for the insert length, keeping the bit perpendicular to the surface throughout.
Most threaded timber inserts are driven using a hex key or Allen key passed through the internal thread. Start the insert by hand to ensure it is square to the surface before applying torque. Drive it in slowly and steadily — rushing this step is how inserts end up misaligned. If the insert begins to tip to one side, back it out completely, check that the hole is clean and perpendicular, and start again. Once the insert flange or leading face is flush with the timber surface, stop driving. There is no benefit to sinking it below the surface, and doing so can crack the surrounding material.
Threaded timber inserts accept machine screws or bolts rather than self-tapping wood screws. Confirm the internal thread size of the insert and select the correct matching machine screw. Drive it in by hand initially to confirm the thread engages cleanly before using a powered driver. The fixing can now be removed and replaced indefinitely without any degradation of the hole, as all wear is taken by the metal-to-metal thread rather than the wood fibre.
- Hole drilled to exact manufacturer-specified diameter for the insert
- Insert started by hand before torque applied to confirm square entry
- Epoxy adhesive applied inside hole for MDF or chipboard substrates
- Insert driven to flush, not below the surface
- Machine screw confirmed as matching the internal thread size of the insert
Two-part epoxy wood filler is the most versatile repair material for stripped screw holes, particularly in situations where the surrounding timber is damaged, where the hole geometry is irregular, or where a solid wood insert would be structurally impractical. Applied correctly, cured epoxy achieves a hardness that exceeds that of the surrounding softwood and provides excellent thread purchase when a pilot hole is drilled through it after curing.
Clean out the stripped hole thoroughly. Use a small pick, awl, or the tip of a craft knife to remove any loose, compacted wood fibre from the interior of the hole. Blow out any sawdust with compressed air or a can of compressed air — any loose particulate matter inside the hole will prevent the epoxy bonding to the surrounding timber. If the timber has been treated with oil or preservative, wipe the area around the hole with a small amount of acetone on a cloth to degrease the surface before applying the filler.
Mix the two-part epoxy according to the manufacturer's ratio — typically equal parts by volume for most wood filler products. Mix thoroughly on a disposable palette or piece of card until the colour is completely uniform with no streaking. Pack the mixed filler firmly into the stripped hole using a small putty knife, palette knife, or the flat end of a wooden spatula. Ensure the filler reaches all the way to the base of the hole with no air pockets, and fill the hole slightly proud of the surface to allow for any minor shrinkage during cure.
Allow the epoxy to cure for a minimum of 24 hours at normal room temperature before drilling or driving. In cold conditions below 10 degrees Celsius, many two-part epoxy products cure more slowly and may require 36 to 48 hours for full hardness. Once cured, pare the surface flush if required and re-drill the pilot hole. The cured epoxy will cut cleanly and the pilot hole will be sharp and well-defined. Drive the screw slowly on first insertion — the epoxy is hard but the thread purchase is being established for the first time and benefits from a controlled, steady drive speed.
- All loose fibre and dust removed from the hole before mixing begins
- Two-part epoxy mixed to the correct ratio with no streaking or unmixed material
- Filler packed to the base of the hole with no air voids
- Minimum 24-hour cure time observed before drilling
- Pilot hole drilled through cured epoxy at 70 to 75 percent of screw shank diameter
In many situations — particularly when the original screw was marginally underspecified for the timber or the load — simply moving up one screw gauge resolves the problem without any filler or plug repair. This method is appropriate when the hole has only been lightly stripped and the surrounding wood fibre is otherwise healthy, intact, and not compressed throughout its full depth.
The rule is to move up by one gauge size only. If your original screw was a 3.5mm shank, move to a 4mm or 4.5mm. Moving up two gauge sizes in one step risks splitting the surrounding timber as the larger shank is driven in, particularly near board edges or in denser hardwoods. Always pre-drill a fresh pilot hole for the larger screw, sized at 70 to 75 percent of the new shank diameter — do not simply drive the larger screw into the existing hole.
Upsizing is the right call when the strip is superficial and the timber is solid beneath. It is the wrong call when the hole is clearly torn out, wider than it is deep, or surrounded by crushed or split fibres. In those cases, a dowel or epoxy repair will serve far better than a larger screw.
A larger screw driven near the end or edge of a board can cause splitting, particularly in softwood. Before upsizing, confirm that the new screw gauge gives at least three times the screw diameter as clearance from the nearest board edge or end. If this clearance is not achievable, the correct solution is a dowel plug repair rather than an upsized screw.
Most stripped screw holes are preventable. The causes are well understood and the precautions are straightforward. Applying these consistently across any project reduces the likelihood of encountering stripped holes to near zero.
A screw driven into a pre-drilled pilot hole of the correct diameter sits cleanly in the timber, engaging the thread without over-stressing the surrounding wood fibre. A screw driven without a pilot hole forces the timber aside as it enters, compressing and potentially shearing the fibres immediately around the thread. The correct pilot hole diameter is 70 to 75 percent of the screw shank diameter for most softwoods, and up to 80 percent for denser hardwoods. For a 4.5mm shank screw, drill a 3.2mm to 3.5mm pilot hole.
Every cordless drill has a torque-limiting clutch — the numbered ring around the chuck housing. Set it to a torque level that stops driving when the screw head reaches the surface rather than allowing the driver to keep spinning. Begin with a lower number and increase it until the screw seats correctly. Once calibrated to the material and screw size, the clutch will stop the driver at the same point every time, eliminating over-driving as a cause of stripped holes. Using a drill on maximum torque throughout is the single most reliable way to strip screw holes in timber.
A Torx or Pozi driver bit that is worn, the wrong size for the screw, or contaminated with debris will slip as it drives, applying lateral force to the screw head and the surrounding timber rather than pure rotational force. This is called cam-out and it is responsible for a significant proportion of stripped holes in practice. Use bits that match the drive type and size of the screw exactly — a PZ2 bit for a PZ2 screw, a T25 bit for a T25 Torx head. Replace bits at the first sign of rounding or wear at the tip. Driver bits are inexpensive and a worn bit costs far more in stripped fixings and remedial work than its replacement value.
A screw that is too fine for the timber density, too short for the load it carries, or the wrong thread profile for the substrate will work loose over time even if installed perfectly. Match screw gauge to material density — coarser, wider-thread screws for softwood and MDF, finer thread profiles for hardwood. Ensure the screw penetrates the receiving timber by at least twice the thickness of the board being fixed. For structural applications such as deck boards, the minimum joist penetration is 40mm. Getting the specification right at the outset eliminates the conditions that lead to stripped holes entirely.
- Load assessed — light, medium, or structural fixing confirmed before choosing method
- Substrate identified — solid timber, MDF, chipboard, or plywood
- Cause of stripping identified — over-driving, repeated removal, or underspecified screw
- Extent of damage confirmed — superficial stripping or full blown-out hole
- Toothpick or matchstick repair selected for light-duty solid timber fixings only
- Wooden dowel plug selected for medium to heavy-duty solid timber fixings
- Threaded insert selected for repeated removal or MDF and chipboard substrates
- Epoxy filler selected for irregular holes, damaged surrounding timber, or where other methods are impractical
- Upsizing considered and clearance from edges confirmed as adequate before proceeding
- Hole cleaned of all loose fibre and dust before any filler or insert is applied
- Full adhesive or epoxy cure time observed before drilling or driving
- Fresh pilot hole drilled at 70 to 75 percent of screw shank diameter before re-driving
- Screw driven at controlled speed with torque limited to prevent re-stripping
- Pilot holes drilled as standard for all subsequent screws in the same material
- Drill clutch set to correct torque level for the screw and timber combination
- Driver bit matched to screw drive type and size, and replaced if showing wear
- Screw gauge and length confirmed as correct for the substrate and load before next installation
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