Warranty Periods: What They Cover and What They Do Not
Almost every Vietnamese pest control quotation carries a line saying bảo hành followed by a number of months. It reads like a guarantee and it can mean several different things.
Three questions establish which one you have been offered, and they are worth asking before signing rather than when something returns.
Question one: what triggers it
A warranty that responds to any sighting of the target species is a strong one. A warranty that responds only to an infestation at the original level is a weak one, because it puts the burden on you to demonstrate a threshold.
Ask what specifically you would need to observe for the warranty to apply, and get the answer in the document rather than in conversation.
Question two: what happens then
Usually a re-treatment at no charge, which is the normal and reasonable form. Occasionally it is a partial refund. Very rarely it covers consequential damage, which for termite work is genuinely valuable and for insect work is essentially never offered.
A warranty that promises an inspection rather than a treatment is not much of a warranty, since an inspection is what you would get anyway.
Question three: what voids it
This is where the substance sits. Common exclusions here: cleaning the treated surfaces within the stated period, self-treatment with another product, structural changes, failure to complete recommended proofing, a new introduction from outside, and non-payment.
Two of those are worth particular attention. Cleaning is the one customers trigger by accident, because nobody told the housekeeper. And failure to complete recommended proofing is the one that lets a contractor decline where a recommendation was made and not acted on.
Typical periods here
One-off residential treatment: commonly three to six months. Commercial contract: usually continuous for the term. Termite treatment: one to five years depending on the method, with soil barrier systems at the longer end. Bed bug treatment: typically thirty to ninety days, which is short for a reason.
That bed bug period reflects a genuine difficulty — reintroduction is common and indistinguishable from failure — and a company offering twelve months on bed bugs is either very confident or has exclusions that make it meaningless.
The seasonal trap
A six-month warranty on a treatment carried out in October runs through the driest and quietest part of the year, when almost nothing would return anyway. The same warranty starting in April is tested properly.
That is not a reason to avoid October treatment, which is genuinely the best month here. It is a reason to judge the work by the following June rather than by the following February.
What a warranty cannot cover
A new introduction. If you bring home a second-hand sofa or a cardboard box with cockroaches in it, that is a new problem rather than a failure of a previous treatment, and no reasonable warranty covers it.
Pressure from an untreated neighbouring property, in a shared building or a dense alley. And anything arising from a structural defect that was reported and not fixed.
One clause worth reading closely on a longer termite warranty is the inspection obligation. Most multi-year termite warranties require an annual inspection, usually chargeable, and are void if it is skipped. That is a reasonable condition and it is also the commonest way these warranties quietly lapse, because nobody diarises year three.
Getting it in writing
A warranty stated verbally is worth very little. Ask for the period, the trigger, the remedy and the exclusions on the quotation itself, in both languages if the document is Vietnamese. It is a normal request and any established company will do it.
Keep the treatment report as well, because the warranty claim will require you to show what was treated, when, and what you did afterwards.
Related reading
See what a quotation should tell you and reading a Vietnamese quotation. On aftercare that protects it, what not to clean afterwards. For failure, why pests come back and when a second opinion is worth paying for. Our parent company sets out its Vietnamese-language terms at khutrungtoancau.vn.
Global Pest Control is the English-language arm of Khử Trùng Toàn Cầu, based in Thu Duc City.
Common questions
They say the warranty is void because we cleaned. Is that fair?
It can be legitimate, because cleaning a treated skirting genuinely removes the residual, and it is also frequently used more broadly than it should be. What matters is whether you were told clearly what not to clean and for how long. If the instruction was never given in writing, that is worth saying, and most companies will re-treat rather than argue.
Is a longer warranty better?
Not on its own. A twelve-month warranty with wide exclusions is worth less than a three-month one that responds to any sighting. Read the trigger and the exclusions before comparing the periods, because that is where the difference between two proposals actually sits.
What if the company disappears?
It happens in this market, which is an argument for checking the tax code and business registration on the quotation before engaging, and for preferring a company with a physical address and a history. A warranty is only as good as the company standing behind it, and that is worth thirty seconds of checking at the start.
