The Short Answer
Termite treatment longevity depends on the type of treatment used. Chemical soil barriers typically last 8–10 years, while baiting systems provide ongoing protection as long as they are maintained and monitored. No treatment is a permanent one-off solution — regular inspections remain essential regardless of which method is used.
Chemical Soil Barrier Treatments
Liquid termiticide barriers are applied to the soil around and beneath your home’s foundations. They work by creating a treated zone that either repels or kills termites before they can reach the structure.
How long do they last?
- Repellent termiticides: 5–8 years under typical conditions
- Non-repellent termiticides (e.g. Termidor): 8–10 years, with some products carrying a manufacturer’s warranty
Factors that reduce effectiveness:
- Soil disturbance (e.g. landscaping, excavation, plumbing works)
- Heavy rainfall and flooding diluting the chemical barrier
- Incorrect application leaving gaps in coverage
- Time and natural breakdown of the active ingredients
Termite Baiting Systems
Baiting systems use in-ground stations containing a cellulose material that attracts foraging termites. Once termites are detected, a slow-acting bait is introduced that workers carry back to the colony, eventually eliminating it.
How long do they last?
Baiting systems are designed for ongoing use with regular monitoring — typically every 3 months. As long as stations are maintained and replenished, they provide continuous protection. The goal shifts from colony elimination to colony suppression and early detection.
Best used when:
- A full soil treatment is not possible (e.g. concrete slabs with no subfloor access)
- The property has a history of repeated termite activity
- Environmental sensitivity is a concern
Direct Timber Treatments
Dusts and foams injected directly into active termite galleries can eliminate a local termite population but do not provide lasting structural protection. They are typically used as part of a broader treatment plan, not as a standalone solution.
Does Treatment Come With a Warranty?
Quality termite treatments using registered products like Termidor HE come with manufacturer warranties of up to 8 years when applied by a licensed operator. Always ask your pest controller about warranty terms before proceeding with treatment.
What Happens After Treatment?
Following treatment, annual inspections are still mandatory to:
- Confirm the treatment remains intact and effective
- Detect any new termite activity or conducive conditions
- Maintain your warranty requirements
- Identify any physical breaches in the treated zone (e.g. from new garden beds or construction)
Getting the Most From Your Treatment
To maximise the lifespan and effectiveness of your termite treatment:
- Avoid storing timber, mulch or debris against the house
- Fix leaking taps, pipes and roof gutters promptly
- Maintain adequate subfloor ventilation
- Notify your pest controller before undertaking any landscaping or building work
- Book annual inspections without fail
Pestyologist provides termite treatment and ongoing monitoring across Sydney. Contact us to discuss the right protection plan for your property.