Termite proofing wood: the methods that help, and the one thing you cannot do
You cannot make wood termite proof. You can choose timber and details that make it a harder target, and then keep checking.
Wood cannot be made termite proof
Start with the honest answer. No treatment, coating or species turns timber into something termites will never touch. What you can do is lower the chance that a colony finds the wood, reaches it unseen or eats it for long.
That means three layers working together: the timber itself, a barrier or physical detail, and regular inspection. Skipping any one of them leaves a gap.
Layer one: pick timber that resists attack
Preservative-treated pine, sold by hazard class, is the common choice for framing and outdoor work. Some hardwoods resist attack on their own heartwood. Termite resistant timber explains what a durability rating means and where it stops.
Two points catch people out. Sapwood is not resistant even in a durable species. And any cut, drilled hole or notch in treated timber exposes untreated wood, which needs a fresh end-cut coat of preservative.
Layer two: a barrier that keeps them out of sight
Termites travel in hidden tunnels, and a barrier works by forcing them into the open or stopping them. There are two broad types.
| Type | How it works | Main limit |
|---|---|---|
| Physical barrier | Sheeting, stainless steel mesh or graded stone that termites cannot chew through or squeeze past | Only works if it is complete and undamaged |
| Chemical barrier | A registered termiticide applied by a licensed technician to the soil around and under the building | Can be breached by later digging or building work |
A licensed professional installs both to AS 3660, and the APVMA registers the chemicals. This is not a job for the owner. Our barriers and prevention guide covers how the options differ.
Layer three: details that remove the easy routes
A lot of termite protection is simply building well. These habits cost little compared with fixing damage later.
- Keep timber off the ground. Soil contact gives a colony direct access and a constant damp supply.
- Keep the subfloor dry and ventilated. Damp is what draws termites to a house and also feeds decay.
- Leave an inspection gap. Do not bury the slab edge under garden beds, paving or render. Termites hide in what you cannot see.
- Move stored wood. Firewood and offcuts stacked against the wall give a colony a bridge.
Do not treat the wood yourself
Painting or spraying a product onto timber you already own is tempting, and it is the wrong move. Over-the-counter sprays do not replace a professional system. And spraying an active colony makes it retreat and return by another path, so the damage continues where you cannot see it.
If you suspect termites are already in the wood, do not spray, break or pick at it. Leave it alone and book a licensed timber pest inspection. Planning protection for new timber is a separate job from dealing with an existing problem.
The last layer is inspection
Whatever you choose, it should be checked, because barriers get damaged and timber ages. A timber pest inspection to AS 4349.3 on a regular schedule is what catches a problem while it is still small. The system you installed is only as good as the last time someone looked.
Frequently asked questions
Can you make wood termite proof?
No. Treatment, durable species and barriers all lower the risk, but none of them make timber immune. The best result comes from combining treated or resistant timber, a barrier system and regular inspection.
Does painting or sealing wood stop termites?
Not reliably. A coating can protect against moisture, but it is not a termite barrier. Termite protection comes from treated timber, a management system installed to AS 3660 and inspections.
Can I apply a termite treatment to timber myself?
You should not. Termiticides are registered by the APVMA and applied by licensed technicians. If termites are already in the wood, spraying can make the colony move and hide, so leave it alone and book an inspection.
What is the simplest way to lower termite risk in timber?
Good building habits do the most for the least effort: keep timber off the ground, keep the subfloor dry and ventilated, leave the slab edge visible and move stored wood away from walls. Then have regular inspections.
Sources
What this page explains is based on these official sources. If you check one and it does not match what you read here, send it to us and the article gets corrected.
- Standards Australia. Australian Standards (AS 3660 termite management, AS 4349.3 timber pest inspection)
- Queensland Building and Construction Commission. Protect against termites — termite management systems and inspections