How Long Does Woodworm Treatment Last?

Early detection of a woodworm infestation is crucial to prevent extensive damage to your wooden assets. Look out for small, round exit holes on the surface of the wood, known as “flight holes,” which are left behind by adult wood-boring insects as they emerge. Additionally, keep an eye on fine, powdery dust (frass) found near the flight holes, as it indicates the presence of active woodworm larvae.

The effectiveness of woodworm treatments is generally proven to last for 20 years, but in practice, it can last for a lot longer. As a result of the woodworm treatment, a protective barrier is created, which prevents new woodworms from taking hold and laying eggs that can hatch into larvae.

Factors Affecting Woodworm Treatment Longevity

Several factors can influence the effectiveness and longevity of woodworm treatment:

1. Type of Woodworm Species

Different wood-boring insects may require tailored treatment approaches due to variations in their life cycles and habits. Identifying the specific species infesting your wood is vital to choose the most suitable treatment.

2. Severity of Infestation

The extent of the infestation impacts the treatment’s success. If the infestation is severe, more aggressive and thorough treatment may be necessary to eliminate all larvae and eggs effectively.

3. Treatment Method

Various woodworm treatment methods are available, ranging from surface treatments to fumigation. The chosen treatment approach will significantly impact its longevity and effectiveness.

4. Wood Type and Condition

The type and condition of the wood being treated also matter. Different wood species may absorb treatments differently, affecting their efficacy. Additionally, the wood’s moisture content and overall condition can influence treatment success.

Woodworm Treatment Options

Let’s explore some of the common woodworm treatment methods and their potential longevity:

1. Surface Treatments

Surface treatments involve applying a liquid insecticide or preservative directly onto the wood’s surface. While these treatments can be effective against superficial infestations, their longevity may vary, especially if the wood is exposed to external elements.

2. Injection Treatments

Injection treatments involve injecting insecticides directly into the flight holes, targeting the larvae within the wood. This method can provide longer-lasting protection as it penetrates deeper into the timber.

3. Fumigation

Fumigation is a highly effective treatment method that involves enclosing the infested item in an airtight space and introducing a fumigant gas. This gas permeates the wood, reaching even the most challenging areas to eradicate all wood-boring insects. Fumigation can offer long-term protection against re-infestations.

How Long Does Woodworm Treatment Last?

In general, woodworm treatments can last for several years, but longevity depends on various factors mentioned earlier. Surface treatments may offer protection for 1-3 years, while injection treatments can last up to 5 years or more. Fumigation, being one of the most potent methods, can offer protection for 10 years or longer.


Protecting your wooden assets from wood-boring insects is of utmost importance to preserve their structural integrity and longevity. Early detection of infestations and the selection of an appropriate treatment method are key to successful woodworm eradication and prevention. Get in touch with Anke Damp Proofing for any advice, questions about our services or anything else! 


How often should I have my property inspected for woodworm?

It is advisable to have your property inspected for woodworm at least once every two to three years, especially if you live in an area prone to wood-boring insect activity.

Can I treat woodworm infestations myself?

While some DIY treatments are available, it is recommended to seek professional help for effective and long-lasting results. Professionals have the expertise and access to specialized products that can ensure the proper eradication of woodworm.

Is it possible for woodworms to cause structural damage?

Yes, untreated dry rot can significantly decrease the value of your home as it indicates poor maintenance and potential structural damage.

Are there any natural remedies for treating woodworm?

While certain natural remedies may offer temporary relief, they are often not as effective or long-lasting as professional treatments. It is best to consult with experts who can provide appropriate solutions based on your specific situation.

Can woodworm treatment harm humans or pets?

Woodworm treatments are generally safe when used correctly. However, it is important to follow instructions provided by professionals and take necessary precautions during the treatment process.

How soon can I expect results after woodworm treatment?

Results may vary depending on the severity of the infestation and the treatment method used. It may take several weeks or even months for complete eradication of all stages of woodworm development.

Should I vacate my property during woodworm treatment?

In most cases, temporary evacuation is not required during standard woodworm treatments. However, it is advisable to discuss this with your pest control specialist as certain situations may require temporary relocation.

Can I paint or varnish-treated wooden surfaces after woodworm treatment?

It is generally recommended to wait until the prescribed drying period has elapsed before painting or varnishing treated wooden surfaces. This allows sufficient time for the treatment to fully penetrate and protect the timber.

How can I prevent woodworm reinfestation?

Regular inspections, maintaining good ventilation, and promptly treating any new signs of infestation are key preventive measures to reduce the risk of woodworm infestation.