Is woodworm harmful to human health?

Woodworm infestations are often a concern for homeowners, especially those with older wooden structures or furniture. Aside from the damage they cause to wood, there’s a question of whether woodworm poses a direct threat to human health.

While woodworm larvae and adult beetles don’t directly harm humans, by biting, stinging, or spreading diseases, their presence can create a range of indirect problems that affect the safety, well-being, and comfort of those living in an infested home.

When left untreated, woodworm can cause structural damage that impacts the stability of wooden beams, floors, and even furniture, posing risks that could potentially harm the occupants of the house. Additionally, a woodworm infestation often signals underlying moisture issues in a home, which can encourage mould growth.

What is Woodworm?

Woodworm refers to the larvae stage of wood-boring beetles that feed on timber.

Contrary to what the name suggests, “woodworm” is not a worm at all but rather the immature form of several species of beetles. These beetles lay eggs on or within wooden surfaces, and as the larvae hatch, they begin to feed by tunnelling through the wood.

The larvae can remain inside the wood for years, eating their way through its structure before maturing into adult beetles and emerging through small exit holes, which are typically the first visible signs of an infestation.

Is Woodworm Dangerous to Humans?

At first glance, woodworm might seem like a harmless issue, particularly because the beetles themselves do not pose an immediate health threat to humans. Unlike bedbugs, woodworm do not bite, sting, or transmit diseases to people. However, their presence can create a range of indirect problems that may impact human health and safety in numerous ways.

The real dangers associated with woodworm come not from the insects themselves, but from the effects they have on your home and living environment.

• Woodworm infestations, when left unchecked, can compromise the structural integrity of your home by weakening wooden beams, floors, and supports. Over time, this may lead to hazardous situations where parts of the building become unstable, posing the risk of collapse or injury.
• Additionally, the damage caused by woodworm can lead to secondary infestations of other pests, such as mites or parasitic insects, which may cause allergic reactions in some people.
• The conditions that encourage woodworm infestations—particularly damp and poorly ventilated spaces, such as bathrooms—can also promote the growth of mould and mildew. Mould is a well-known health hazard, particularly for individuals with asthma, allergies, or weakened immune systems.

Breathing in mould spores can lead to respiratory issues, including coughing, wheezing, and, in severe cases, lung infections. Therefore, it is important to check your home regularly for signs of woodworm and call a specialist when you suspect it might have infested your house.

Parasites Coexist with Woodworm

• Woodworm-damaged areas can sometimes attract mites.
• Prolonged exposure to infested areas can result in allergic reactions or respiratory issues.
• The accumulation of dust and wood particles can particularly affect those with existing respiratory problems.

Associated Mould Problems

• Woodworm infestations are often accompanied by dampness and mould, especially when left untreated for extended periods.
• As the larvae weaken the wood, the compromised structure becomes more prone to damp problems, fostering mould and mildew growth.
• Mould spores can be harmful, particularly for individuals with asthma or allergies.
• Exposure to mould spores may lead to symptoms like: Coughing, Sneezing, Eye irritation, and Respiratory Infections.

Structural Damage to Your Home

One of the most serious consequences of a woodworm infestation is the structural damage it can cause to your home.

Over time, woodworm larvae can significantly weaken wooden beams, floors, and other key structural components. This can compromise the integrity of your home, creating safety hazards for you and your family.

For example, weakened beams may eventually collapse, causing injury or making your home uninhabitable until repairs are carried out. While the risk of a full structural collapse is rare, it’s important not to underestimate the potential damage that woodworm can cause if left untreated.

If you are unsure about the structural integrity of your home, contact us and get a free damp and timber survey.

Furniture Ruined by Woodworm

Woodworm can also cause damage to your furniture, especially pieces made of untreated wood.

Infested furniture can become structurally unsound, leading to cracks, breakages, or a complete loss of the item’s functionality. This can be particularly distressing if the affected items are antiques or hold sentimental value.

Damaged furniture can also create sharp or jagged edges, posing a risk to anyone handling or using it. The small holes left by emerging beetles may be difficult to spot at first, but over time, the aesthetic and functional value of your furniture can be diminished significantly.

Woodworm Impact on Kids and Pets

Children and pets are more vulnerable to the indirect effects of woodworm infestations.

For instance, structural damage to flooring or furniture could pose tripping or falling hazards. Exposure to mould resulting from woodworm damage can exacerbate health issues in both kids and pets, leading to respiratory problems, skin irritation, or allergic reactions.

Additionally, pets may be curious about the affected areas and might even chew on damaged wood, potentially ingesting harmful chemicals or fragments. While the woodworm larvae themselves are not toxic, the materials used to treat woodworm-infested wood may pose a risk to animals if ingested.

In case you suspect woodworm in your home, make sure to contact a professional as soon as possible. They will give you the most appropriate woodworm treatment to ensure your family’s safety.

How to Spot and Treat Woodworm

Spotting woodworm early can prevent further damage and reduce risks to your health.

“Early signs of woodworm around the home are dead carcasses of beetles on window sills, as once they emerge from the infested wood, they are attracted to the light.

With only a life span of 2 to 4 weeks after emerging, you may notice these on window sills from Late March to September.” Wesley Blackburn, Director at Allerton Damp

Signs of woodworm include small round holes in wooden surfaces, fine powdery dust around these holes (called frass), and weakened or crumbly wood. If you spot these signs, it’s important to take action immediately and contact a woodworm specialist.

Treatment options include using chemical woodworm treatments, which can be applied by professionals or DIYers, depending on the extent of the infestation. Improving ventilation and reducing moisture levels in your home can also help prevent future infestations.

If you are looking for more information on how to spot and treat woodworm, you can read our blog on ‘Signs of Woodworm’.