Treated-sheet termite barrier
A treated-sheet termite barrier (Kordon, HomeGuard) is a physical sheet plus an embedded chemical active assessed under AS 3660.3 for termite resistance.
Ask Chalkline about this →A treated-sheet termite barrier is the category of termite-management product that combines a physical sheet substrate with an embedded chemical active. The two flagship Australian products are Kordon (deltamethrin-impregnated) and HomeGuard (bifenthrin-impregnated). Both are assessed under AS 3660.3 and certified through CodeMark.
Why “treated-sheet” is a category
AS 3660.1 groups termite-barrier systems into three families:
- Physical barriers: stainless mesh (Termimesh), graded stone (Granitgard), reinforced concrete slab edge. No chemistry.
- Chemical barriers: soil-applied actives (fipronil, imidacloprid, bifenthrin), no physical layer.
- Treated-sheet barriers: combination of a physical sheet plus an embedded chemical active. Belt-and-braces.
Treated-sheet sits in the third family because it relies on both:
- The physical sheet (HDPE film or laminate) presents a continuous skin termites must penetrate.
- The chemical active is the deterrent that stops them attempting penetration in the first place.
If a termite finds a fold, tear, or untaped edge in the sheet, the active concentration at the gap is the second line of defence.
Common AU products
| Product | Active | Carrier |
|---|---|---|
| Kordon | Deltamethrin (synthetic pyrethroid) | HDPE film |
| HomeGuard | Bifenthrin (synthetic pyrethroid) | Polymer film + foil laminate |
Both are CodeMark-certified for AS 3660.3 compliance. Both are installed at slab-prep stage or as penetration sleeves.
Where treated-sheet sits
The product family is used for:
- Perimeter strip along the slab edge (continuous run).
- Penetration collars around plumbing and conduit through the slab.
- Construction joints between slab pours.
- Cold-joint detailing at slab-to-wall transitions.
Treated-sheet is rarely the only termite-management measure on a building; it pairs with a chemical soil treatment or a perimeter inspection zone for full AS 3660 compliance.
For a builder
- Order to slab program. Sheet goes in pre-pour; missed window = re-spec entire system.
- Detail install matters. Overlaps, tape, penetration cuffs all per manufacturer instructions: these aren’t generic; they’re the certification basis.
- Get the installer’s certificate. CodeMark certification is for product + install method. An ad-hoc install voids it.
- Brief owner on inspection routine. Treated-sheet is one layer; the AS 3660.2 annual inspection regime is separate.
Category: Termite management.
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Last updated: 2026-05-29. Verified: 2026-05-29. Quarterly review for currency.