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Home  /  Damp Proofing • Structural Repairs • Woodworm  /  DIY Woodworm Treatments: Can I Treat Woodworm Myself?
Common furniture beetle
24 June 2025

DIY Woodworm Treatments: Can I Treat Woodworm Myself?

Written by Nicholas Donnithornne
Damp Proofing, Structural Repairs, Woodworm infestations, woodworm, woodworm damage Comments are off

Many homeowners, when faced with small exit holes in their floorboards or antique furniture, are tempted to take matters into their own hands. A quick online search reveals DIY woodworm treatment options, ranging from WD-40 to vinegar. But are these really effective, or is it a case of good intentions gone wrong?

Let’s cut through the confusion and explore the truth about treating woodworm at home, when it can help, when it can’t, and why expert help is often the best woodworm treatment of all.

What is Woodworm?

Despite the name, woodworm isn’t a worm at all. It refers to the larvae of various species of woodboring beetles. These tiny creatures live deep within your timber, munching away silently. The damage they cause, woodworm damage, often isn’t visible until it’s already significant.

Telltale signs include tiny exit holes, fine powdery frass, and weakened or crumbling wood. Left untreated, woodworm can compromise the structural integrity of your home, affecting joists, roof timbers, floorboards, and more.

Can You Treat Woodworm with Home Remedies?

A quick search and you’ll find lists of home remedies for woodworm that promise a quick, cheap fix. But let’s be honest, if treating woodworm were as simple as spraying vinegar or plugging holes, infestations wouldn’t persist for decades in homes across the UK.

These methods often skim the surface, quite literally. But the larvae? They’re still nestled deep inside the wood, beyond reach of these solutions.

Will Blocking Woodworm Holes Work?

No. To block woodworm holes is to dress a wound without first cleaning it. It may restore the furniture’s appearance, but it does nothing to kill the larvae. They’ll either chew through elsewhere or, worse, remain inside, continuing their destruction.

This approach might suit inactive infestations to fill woodworm holes for cosmetic reasons. But for active cases, it’s about as ‘effective’ as painting over rust.

Will WD-40 Kill Woodworm?

Despite what some DIY forums suggest, treating woodworm with WD-40 or using WD-40 woodworm tactics is largely ineffective. WD-40 is a water displacer and lubricant. It’s not an insecticide. It coats the surface but doesn’t penetrate deep enough to reach the larvae. In reality it’s a bandage where surgery is needed. As it is oily, it will also stain the timber surface and there is no guarantee the oils will evaporate and leave the surface unstained.

Does White Vinegar Kill Woodworm?

Treating woodworm with vinegar might appeal to those seeking natural remedies. But vinegar, though acidic and a decent cleaner, lacks the strength or depth to kill wood-boring beetle larvae. In all probability you’ll end up with sour-smelling floorboards, not a solution.

Can You Kill Woodworm with Bleach?

Bleach? Harsh, hazardous, and ultimately futile. Does bleach kill woodworm? No. It’s a disinfectant, not a pesticide. It won’t eliminate larvae and may even damage your timber in the process, causing discolouration and weakness to the timber.

What About Other Homemade Remedies?

Garlic for vampires, yes. Woodworm? Not quite. Many natural remedies for woodworm include herbs and oils that may repel insects, but there is no evidence that they kill larvae inside timber. They might smell potent, but the beetle larvae will remain, feasting in the dark.

So, Can I Treat Woodworm Myself with Any Products?

There are DIY woodworm treatment products on the market, including woodworm treatment spray options. Some may help in limited, early-stage infestations, especially on surface-level woodworm.

However, most products don’t penetrate deeply enough. Worse still, DIY treatments don’t come with the expert diagnosis necessary to distinguish between beetle species or lifecycle stages. One treatment doesn’t fit all. A survey allows for a more directed treatment, rather than blanket treatment, where it may not be required.

Applying chemicals incorrectly can also pose risks to your health. Safety equipment, experience, and a trained eye are essential.

How Should Woodworm Be Treated?

Start with a woodworm survey. Professional surveyors don’t guess. They know what signs to look for, where to find them, whether the infestation is still active and how to identify the species involved. From there, a tailored treatment plan using professional, deeply-penetrating insecticides is implemented.

Professional woodworm treatment ensures that even unseen, structural timbers, such as those in roof spaces or under floors, are addressed. At Peter Cox, we don’t just treat the visible signs. We eliminate the problem at its source.

Are you certain it is even woodworm causing the damage? That’s exactly why a woodworm survey matters. It gives clarity and confidence, and if needed, a clear roadmap for moving forward.

Why Choose Peter Cox?

At Peter Cox, we combine over 70 years of expertise with the latest technology to deliver the best woodworm treatment available in the UK. Here’s why homeowners trust us:

  • Expert diagnosis by qualified surveyors
  • Tailored treatment plans typically backed by a 20-year guarantee
  • Safe, effective, and comprehensive treatments giving you peace of mind
  • A full range of property preservation services beyond just woodworm

Your home deserves protection that works. That means going beyond surface-level fixes and ensuring every inch of timber is secure.

Worried About Woodworm? Contact Peter Cox Today

Whether you’re seeing suspicious holes in a timber beam or just want peace of mind, don’t leave it to guesswork. Contact Peter Cox for a thorough woodworm survey and let our specialists handle the rest with care, precision, and lasting results.

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Nicholas Donnithornne

Nicholas joined the Woodworm and Dry Rot Division of Rentokil’s research laboratories in 1980 as a laboratory technician. For the next 28 years he worked on insect, fungi, damp and timber treatment research both on the vectors and on formulation of product. In 1990 he became the company’s timber technologist working on timber pre-treatment and gained responsibility for ISO 9001 compliance as the Laboratory and QA Manager. In 2008 he transferred to the Property Care business as Technical and SHE Manager, where he is also responsible for technical training. From 2008, Nicholas has been actively involved with the Property Care Association Technical committees of the Structural Waterproofing, Preservation, Residential Ventilation and Invasive Weed Control groups. He has also been a speaker at the PCA National conference. In 1983 he was honoured to be elected a fellow of the Royal Entomological Society of London and further honoured in 2001 with fellowship of the Linnean Society of London.

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