How do I pull nails out without damaging the timber?

Two things damage timber when nails come out: the claw crushing the surface it is levering against, and the nail dragging a plug of fibres up with it. Both are avoidable.

What you'll need

• claw hammer or wrecking bar
• scrap timber block
• pincers or nail nippers (optional)
• nail punch (optional)

Step by step

1. Put a block under the claw.A piece of scrap timber, or a thin plywood offcut, spreads the load and keeps the steel off the surface. This one habit prevents most of the damage.
2. Raise the leverage as the nail comes out.As the nail emerges, add a thicker block. This keeps the pull nearly straight and stops the nail bending, which is what tears the hole open.
3. Roll the hammer rather than pulling back.Rock the head over sideways in an arc. It gives far more mechanical advantage than heaving on the handle and it is much easier on the nail and the timber.
4. Use pincers close to the surface for stubborn nails.Grip the shank as close to the timber as possible and roll the pincers over on their jaws. Repeated small bites bring a nail out that a claw cannot start.
5. Punch it through if you can reach the back.For a nail in a piece you are dismantling, driving it out backwards through the original hole does no surface damage at all.
6. For a headless nail in a face you care about, cut it off.Nip it flush with side cutters and punch the stub below the surface, then fill. Digging it out will always cost more surface than leaving it.
7. Separate boards before pulling nails where you can.Lever the boards apart, then pull each nail from the back of the piece so any tear-out happens on the hidden face.
8. Watch for ring shank nails.They will not come out cleanly and often break. Cutting them and punching the stub through is usually the sensible choice.
9. Check for nails before machining reclaimed timber.A metal detector or a magnet, and a careful look at every face. A hidden nail destroys a planer blade or a saw blade instantly.

Tips

• A thin plywood offcut under the claw is enough to prevent almost all crushing damage.
• Rolling the hammer sideways gives more force with less effort than pulling on the handle, and bends the nail less.
• On reclaimed timber, assume there are nails you have not found until a magnet says otherwise.

Common mistakes

• Levering directly on the finished surface — The narrow steel claw concentrates all the force on a small area and crushes the fibres, leaving a permanent bruise that shows badly under any finish.
• Pulling a long nail out in one go — As the claw angle increases, the pull direction goes sideways, the nail bends and it drags a cone of fibres out of the surface.

If it doesn't work

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