woodworm holes in wood

Signs of Woodworm

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Signs of woodworm

Early woodworm identification is the key to stopping them before they cause more harm to your property.

You may not realise that you have a woodworm problem until the resulting damage becomes visible. If left untreated woodworm can seriously weaken timber - this may lead to structural failure of timbers.

Below we have explained the signs that could indicate that you have a woodworm problem.

Woodworm Timber Holes

Fresh Exit Holes In Timber

Round or oval shaped exit holes are approximately 2mm in size. Woodworm exit holes will appear clean and fresh and often have sharp edges.

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Woodworm Galleries

Tunnels In Wood

Tunnels in wood, also known as galleries are the result of woodworm boring through the infected timber, these are often hard to see.

Get Treatment for Tunnels in Wood »

woodworm bore dust

Bore Dust

Bore dust, also known as frass, is caused by emerging adult woodworm beetles. This is usually visible below the infested timber.

Treat Woodworm Bore Dust »

Weak floorboards

Weak & Damaged Floor Boards

In extreme cases, a foot or chair leg going through the floor can indicate a more serious infestation.

Treat Woodworm in Weak & Damaged Floor Boards »

Crumbling wood

Crumbling Wood

Crumbling wood is caused by multiple woodworm exit holes and can be found around corners or edges of roof joists or floorboards.

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Woodworm Beetle

Live Adult Beetles

Adult beetles emerge from timbers between May and October.

Find Out the Different Species of Wood Boring Beetles »

Dead wood beetle

Dead Beetles

Dead woodworm beetles can be found near the infested timber or around nearby windowsills. This can indicate a previous or an existing woodworm infestation.

Get Treatment for Wood Boring beetles »

woodworm egg


Female woodworm beetles protect their eggs by laying them within cracks in timber. These vary in size depending on the species of beetle, but all are difficult to spot with the naked eye.

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Woodworm Larvae

Woodworm Larvae

Woodworm larvae are usually a creamy-white colour and curved in shape, however, these are rarely seen. 

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Spotted Signs of Woodworm?

Any of these signs shown below could mean you have a woodworm infestation and a thorough inspection of your property should be carried out. Woodworm treatments by our trained technicians carry a 30 year guarantee so you can be sure all work conducted by us, will keep you and your property safe.

What Does a Woodworm Look Like?

There are four stages of woodworm development, these are:

    1. Egg – Laid in cracks and crevices in wooden objects, floorboards and timbers by Adult beetles  
    2. Larva – When larvae hatch they immediately burrow through the timber, making it very unlikely they would be seen. Safely inside the wood they continue to tunnel and feed for several years.
    3. Pupa – As the larvae mature and increase in size, they bore towards the wood surface to pupate
    4. Adult beetle emerge as adult beetles and look to mate.

Woodworm Life Cycle

View our short infographic explaining the life cycle of a woodworm.

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Dealing with a Woodworm Infestation

Our professional surveyors will carry out a thorough inspection to identify the signs of woodworm and assess the type of woodworm involved. They will also determine if the infestation is active, check for associated problems such as wood rot or damp and if any timbers need replacing. 

Based on this detailed evaluation they will then recommend any appropriate woodworm treatment. These woodworm treatments all carry a 30 year guarantee making sure the issue doesn't return anytime soon.

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