Your New Build's Termite Certificate: What Form 16 Covers, and the Bit That Expires

When you settled on your new build, someone handed you a folder. Somewhere in it is a single page with the words Form 16 at the top, a licence number, and a date. Most people file it and never look at it again, because the reasonable assumption is that it means the termite protection is done.

It does mean something. It just doesn't mean that.

I inspect a lot of homes in the newer Sunshine Coast estates, and the same conversation comes up over and over: the owner believes they are covered, the paperwork says they were covered on one particular day, and nobody has done the one thing that keeps the cover alive. This post is about the difference, and about the twenty minutes of reading that closes the gap.

What a Form 16 actually is

In Queensland, Form 16 is an inspection certificate under the Building Act. It is the mechanism by which a competent person (someone licensed to do a particular piece of building work) certifies that the work they did complies with the relevant standard.

For termite management, that means your installer is certifying one thing: the termite management system was installed to AS 3660.1 on the date shown.

Read that again, because the important words are "on the date shown". A Form 16 is a snapshot. It is a competent person saying "when I finished, this was compliant." It is not a warranty, it is not insurance, and it is not a statement about the condition of your home today. It is the building equivalent of a roadworthy certificate: genuinely meaningful, and specifically about a moment that has already passed.

Go and find your yellow tag first

Before the paperwork, go and look at your meter box. AS 3660.1 requires the builder to fix a durable notice in a prominent location: almost always inside the electrical switchboard or meter box. People call it the yellow tag.

It is a small sticker, and it is the single most useful document you own about your termite protection, because unlike the folder in the study it cannot be lost in a house move. It should tell you:

• The type of system installed: physical barrier, chemical soil treatment, or a combination
• The product used
• The date of installation
• The installer and their licence details
• The expected life of the treatment, where it is a chemical one
• A note that the system requires regular competent inspections

Go and photograph it now, before you keep reading. If you can't find one, that itself is worth a phone call: the notice is a requirement, not a courtesy, and a missing one usually means either it was never fitted or a later trade removed it.

The two systems you probably have

Nearly every new home on the Coast has one of two approaches under it, and what happens next depends on which one you've got.

A physical barrier

A physical barrier is a sheet, mesh or graded stone product built into the slab and around every service penetration: the pipes, conduits and cavities that would otherwise give termites a concealed path up into the frame. It doesn't kill anything. It forces termites into the open, where an inspection can find them.

The good news: a properly installed physical barrier can last the structural life of the building. There's no chemical to break down. The catch is that it only works where it is continuous, and a physical barrier is very easy to defeat from the outside, which is the next section.

A chemical soil treatment

A chemical treatment is a treated zone in the soil beneath and around the slab. Termites either avoid it or carry it back into the colony, depending on the product.

Chemical treatments have a finite service life. The yellow tag states the expected life for the product used. When that period is up, the treated zone is no longer doing the job it was installed to do, and it needs to be reapplied: that is not a fault, that is the product working exactly as designed and then reaching its end.

This is the bit that expires. It is also the bit that almost nobody diarises, because the expiry date lives on a sticker in the meter box rather than anywhere it would ever remind you.

How the warranty quietly stops applying

Here's where the real problem sits, and it has almost nothing to do with the system failing.

Builder and installer warranties on termite systems are conditional. The near-universal condition is that the property is inspected by a competent person at intervals not exceeding twelve months, and that those inspections are documented. AS 3660.2 (the in-service part of the same standard family) is the part that governs this.

Miss the inspections, and you have not merely skipped a service. You have, in most cases, released the other party from their obligation. Nobody writes to tell you this has happened. There is no notification, no lapse notice, nothing changes at all until the day you need to make a claim and discover you can't.

The second way it happens is physical, and it's the more common one on new estates: bridging. Every one of these defeats a barrier that is otherwise in perfect condition:

• Garden beds built up against the house, with soil or mulch above the level of the slab edge. This is the number one cause I see, and it's almost always done in the first two years by an owner doing a nice job of landscaping.
• Concrete paths, patios and driveways poured hard against the slab after handover, covering the inspection zone.
• Air-conditioning condensate discharging into the ground at the slab edge, keeping one patch permanently damp: termites need moisture more than they need timber.
• Extensions, decks, pergolas and sheds attached to the house without their own protection, giving a concealed path straight past the original barrier.
• Timber stored against the wall: firewood, offcuts, the pallet the pavers came on.

What the annual inspection is actually for

People assume an annual termite inspection is someone walking around looking for termites. It's a reasonable assumption and it's roughly half of it.

The other half is inspecting the protection system itself: checking that the barrier hasn't been bridged, that the inspection zone is still visible, that drainage hasn't changed, that no one has stacked half a tonne of pavers over the one section you'd need to see. On a new-build with a system under it, that second half is the more valuable one, because the system is doing its job and the risk is that something quietly stops it.

A proper inspection covers the interior room by room, the subfloor and roof void where access allows, and the full external perimeter including fence lines, stumps, retaining walls and trees. Where a wall reads as suspect, I use a Termatrac T3i: radar that detects movement inside a wall cavity without drilling into it. On a home under warranty that matters more than it sounds, because the alternative diagnostic is making holes in a house you're still paying off.

You can read more about what AS 3660 requires of a compliant system, or about the barrier types themselves, if you want the detail behind any of this.

If you're in Aura, or any of the new Coast estates

New estates concentrate this problem in a way older suburbs don't.

Practically every home has a builder-installed system, which is good. Practically every owner received the paperwork at handover in the middle of a move, which is less good. And the estates hit the two-to-five year mark all at once: the window in which the landscaping goes in, the shed goes up, the patio gets poured, and the first chemical service lives start running down.

There's a second factor specific to new development: the ground has been disturbed, cleared and re-formed, and construction fill and buried timber offcuts are a genuinely common food source. A new house is not a low-risk house. It's a house with good protection installed, which is a different thing.

If you're in Aura or the surrounding new estates, the practical read is: your system is probably fine, your paperwork is probably fine, and the thing most likely to catch you out is a garden bed and a diary entry nobody made.

What to do in the next twenty minutes

1. Photograph the yellow tag in your meter box. Note the system type and, if it's chemical, the expected life and the install date.
2. Find the Form 16 in your handover folder and photograph that too. Keep both somewhere that survives a phone upgrade.
3. Work out your expiry. Install date plus the stated life is the year the chemical zone stops being a chemical zone. Put it in your calendar now.
4. Read the warranty condition. Find the sentence about inspection intervals. That sentence is the one that decides whether you're covered.
5. Walk the perimeter. Is soil, mulch, concrete or timber sitting above or against the slab edge anywhere? Is the weep-hole line visible the whole way round? Anything covering it is a bridge.
6. Diary the inspection: twelve months from the last one, or from handover if there hasn't been one.

None of that costs anything, and it puts you ahead of most owners in your street.

The honest summary

Your Form 16 is a real certificate and it means something real: a licensed person certified a compliant install on a given day. Keep it.

What it does not do is carry forward. The protection you have today is a function of what the system was, how long its chemistry lasts, whether anything has been built or planted across it since, and whether the annual inspection condition has been kept up. Four things, and the certificate only speaks to the first.

The good news is that this is one of the cheapest problems in home ownership to stay on top of. Once a year, someone who knows what they're looking at walks the house and tells you the system is still doing its job, and your warranty stays live because you did.