Understanding Woodworm: Causes, Signs, and Solutions

Understanding Woodworm: Causes, Signs, and Solutions

3rd July, 2025

Woodworm is a term used to refer to a couple of beetle species that inhabit the UK, namely the Common Furniture Beetle and the Death Watch Beetle. Alongside damp, condensation and mould, woodworm is a very real threat to London homes and in this short article, we take a close look at the causes, tell-tale signs and treatments for this invasive insect.

What are the causes of woodworm?

Woodworm are attracted to damp wood, where adult females prefer to lay their eggs and a damp, humid environment makes it even more attractive. They burrow into the wood to lay their eggs, which eventually turn into larvae that burrow further into timber, devouring the material causing it to degenerate. If not treated, woodworm can destroy timber sections and replacement is the only practical solution.

Tell-tale signs of woodworm

Sure signs of woodworm include tiny holes with small mounds of wood dust next to the holes; the eggs are creamy white in colour and you might see a few on the floor, along with woodwork droppings and perhaps the odd dead adult beetle. If you notice any of these signs, contact London Damp Surveys and we will arrange for one of our certified damp inspectors to survey your property to determine the presence of woodworm.

Woodworm treatments

While there are DIY treatments, we don’t recommend that you go down this avenue, as a home fix rarely works; to exterminate all the larvae is not an easy thing to do; the professionals seal off a space and apply chemical solutions that reach all the insects. In some cases, the timber decay is such that replacement is the only option; replacing a timber floor is never going to be cheap. A team of woodworm experts would use a synthetic neurotoxin that is highly effective, ridding the property of destructive insects and if there are woodworm in your London home, we’ll find it and resolve it.

Excess humidity

Insects in general are attracted to moist environments; add to that a lack of air circulation and you have the perfect conditions for woodworm, insects that breed like crazy and can be difficult to spot. It might be the rafters, the flooring or window and door frames; once eggs are laid, the process begins and when the eggs turn into larvae, they feed on wood, decaying the material in double-quick time. The sooner you do something about it, the easier the removal is, although success is not always guaranteed if you do it yourself. Create ventilation by opening windows and using extractor fans, woodworm do not like dry air, so make sure the house has good airflow.

If you suspect woodworm might be present, call London Damp Surveys on 0207 305 5997 or fill in the online form and we can arrange for one of our certified surveyors to inspect your London home.

Damp Survey Costs

Transparent pricing with no hidden fees for our independent, unbiased surveys.

Level 1

Level 1

£199 + VAT

What’s included:

  • Inspection of walls
  • Inspection of floors
  • Inspection of ceilings
  • Leak inspection of drains and plumbing
  • Damp information and prevention guide
Level 2

Level 2

£299 + VAT

What’s included:

  • Everything in Level 1
  • Dry rot inspection
  • Wet rot inspection
  • Woodworm inspection
  • Damp information and prevention guide

 Survey Add Ons

Add On 1

£299 + VAT
Lab Analysis Of Plaster

Laboratory analysis Of plaster identifies hygroscopic salts such as chlorides and nitrates. which indicate whether damp is caused by rising groundwater or by plumbing leaks, This testing removes guesswork, allowing the exact source of moisture to be identified so the correct treatment is applied rather than carrying out unnecessary damp-proofing work.

Add to Survey

Add On 2

£299 + VAT
Mould Lab Swab Testing, qPCR on DNA

qPCR DNA mould testing detects microscopic mould spores that are invisible during a normal inspection and van remain hidden behind walls, floors. or inside building rkaterials. It identifies the exact mould species present and the contamination level, allowing hidden mould problems to be confirrned and properly treated before they affect the property or occupants’ health.

Add to Survey

Qualifications: All our surveyors are PCA and CSRT qualified for remedial treatments and also CSSW qualified for structural waterproofing.
Next day report: You will receive the report within 24 hours of the inspection taking place.

These are the tools we use

A damp meter

A damp meter

A damp meter is a diagnostic tool used to detect and measure moisture levels within building materials such as plaster, brick, timber, and concrete.

Borescope camera

Borescope camera

borescope camera is a small inspection camera attached to a flexible semi-rigid cable that allows you to see inside areas that are otherwise inaccessible.

Inspection Drone

Inspection Drone

A drone is a remotely operated aerial device equipped with a camera that allows visual inspection from above without the need for scaffolding or ladder.

Air Humidity Sensor

Air Humidity Sensor

Air humidity sensor measures the amount of moisture present in the air, expressed as relative humidity (RH) in percentage. It helps determine whether indoor conditions are contributing to condensation, mould growth, or damp-related issues.

Thermal Imaging Camera

Thermal Imaging Camera

A thermal imaging camera detects temperature differences on surfaces by using infrared technology to produce a heat map image. In damp investigations, it helps identify cold spots, moisture intrusion, insulation defects, thermal bridging and leaks.

Air Flow Ventilation Detector

Air Flow Ventilation Detector

An air flow ventilation detector measures the movement and volume of air passing through vents, extractor fans, and air bricks. It confirms whether ventilation systems are working properly and achieving adequate air changes within a room. Poor airflow leads to trapped moisture, high humidity, condensation on cold surfaces, and ultimately mould growth.

Mould Swab Test Kit

Mould Swab Test Kit

A mould swab test is carried out to confirm the presence of hidden mould growth and identify the specific species involved. Surface mould is not always visible, especially behind furniture, inside cavities, or within ventilation systems. Laboratory analysis of a swab sample determines whether active mould spores are present and what type they are, which helps assess potential health risks and decide the correct remediation approach rather than relying on visual assumption alone.

Plaster Salt Analysis Lab

Plaster Salt Analysis Lab

Laboratory analysis of plaster is used to identify the type of salts present within the material, typically chlorides and nitrates. The presence and concentration of these salts help determine whether the moisture source is consistent with rising damp, ground contamination, or another forms [sic] of water ingress. such as mains water leak, This removes guesswork and prevents misdiagnosis, ensuring the correct remedial treatment is specified rather than applying unnecessary or ineffective solutions.