Woodworm refers to the larvae of wood-boring beetles that infest and consume timber, often leading to structural damage over time. The term ‘woodworm’ encompasses various species of beetles, each with distinct characteristics and behaviors. Understanding the biology, lifecycle, and behavior of these insects is crucial for effective identification and treatment.

Common Types of Woodworm in the UK

Common Furniture Beetle (Anobium punctatum)

The most prevalent woodworm in the UK, often found in Victorian properties. It primarily infests softwoods, although hardwoods are not entirely immune. Despite its ubiquity, the damage caused is usually of little structural significance and is often inactive, requiring no treatment.

Wood Weevil

Wood weevil is commonly associated with cellar rot and requires active rot to thrive. Eliminating the water source, and thereby the rot, is typically sufficient to halt further wood weevil damage.

The Structure of Timber: Softwoods vs Hardwoods

Woodworm predominantly targets softwood within timber. Old pines, having a higher proportion of hardwood, tend to retain their structural integrity despite woodworm infestation. Conversely, modern, faster-growing pines possess more softwood, rendering them more susceptible to woodworm damage.

Treatment of Modern Timber

Modern timber is often treated with a vacuum and fungicidal process known as VAC-VAC to deter woodworm and other timber pests. This treatment enhances the resistance of timber to infestations, extending its lifespan and structural integrity.

Detecting and Monitoring Woodworm Activity

Monitoring for re-emerging exit holes is a common practice to ascertain woodworm activity. Covering existing holes with gloss paint, varnish, or glued paper and checking annually for new holes provides a practical method for homeowners to monitor for ongoing activity.

Professional Treatment: Permethrin

Permethrin is the professional treatment choice for woodworm. It’s a broad-spectrum insecticide that is toxic to insects but generally safe for humans. Treatment with Permethrin is particularly effective when woodworm activity is confirmed, and is best applied between February and August when woodworm are most active.

Woodworm Guarantee and the Cost Implication

Woodworm infestations can be a point of contention during property sales, often leading to cost renegotiations. Although guarantees are often provided post-treatment, their value can be questionable given the 2-year lifecycle of woodworm. In the unlikely event of activity, re-emergence of woodworm is common after treatment, therefore you should check and compare holes a year on, and retreat with permethrin, if they reemerge

Solutions for Property Owners

For property owners, proactive monitoring and early treatment are the keys to managing woodworm. Applying a visible cover over suspected areas to monitor for new exit holes, and treating confirmed active infestations with Permethrin, can effectively manage woodworm issues. Additionally, addressing any dampness or rot, especially in cellars, will further deter wood weevil and other wood-boring insects.


Woodworm, while a common issue, can be effectively managed with early detection, monitoring, and appropriate treatment. Understanding the types of woodworm, their preferences for softwoods, and the effective treatment options available allows homeowners and property managers to maintain the structural integrity and value of their properties. The treatment of modern timber with VAC-VAC and the use of Permethrin for active infestations provide robust solutions to managing woodworm, ensuring the longevity and safety of timber structures.

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