Chemical Termite Barriers Sydney
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How a Chemical Termite Barrier Protects Your Home
Subterranean termites live in the soil and travel underground to find timber. Around most Sydney homes, they look for concealed ways in, such as cracks in the slab, gaps around plumbing, weep holes and timber close to the ground.
A chemical termite barrier, also called a termite soil treatment, places a continuous treated zone in the soil against the building. The termiticide is applied by trenching along the external walls and drilling through the concrete paths and paving that meet the house, so termites moving towards the building have to pass through treated soil.
A barrier reduces the risk of termites entering undetected. It doesn’t make a home termite-proof, and it isn’t a substitute for regular inspections or for treating termites that are already active inside.
Types of Chemical Termite Barriers
Non-Repellent Termiticides
Termites can't detect non-repellent products, so they move through the treated soil and pick up the termiticide. Depending on the product, it can then be passed to other termites in the colony. A common choice for established Sydney homes.
Repellent Termiticides
Repellent products deter termites from crossing the treated soil, so they turn away rather than enter it. Because termites look for untreated gaps, the treated zone needs to stay continuous all the way around the home.
Termite Reticulation Systems
Pipes laid in the soil around the home deliver termiticide to the treated zone, so it can be replenished later through access points where the system design and approved products allow. Suits heavily paved homes and renovations.
Chemical Termite Barrier Installation Steps
Inspection First
Every job starts with a termite inspection of the house, subfloor, roof void and garden. If termites are already active, they’re treated before the barrier goes in.
Written Quote
We measure the perimeter, check the paths, paving and garden beds against the walls, and give you a written quote before any work is booked.
Trenching and Drilling
We trench along garden areas and drill through the concrete and paving that meet the house, then apply the termiticide at the rate on the product label.
Subfloor and Penetrations
Where a home has a subfloor, the soil around piers and along the subfloor perimeter is treated where access allows, along with service penetrations.
Records and Notice
You receive written details of the product, the treated areas and when re-treatment or inspection is due, with a notice fixed where applicable.
Chemical Barriers for Slab Homes, Older Homes and Townhouses
Slab-on-Ground Homes
Brick veneer homes on slabs are treated along the external walls and under the paths, driveways and paving that meet the house, where the product and site allow.
Homes on Piers and Raised Floors
Federation cottages, weatherboard homes and older houses with suspended timber floors also need the soil around piers and along the subfloor perimeter treated, where access allows.
Townhouses and Strata Buildings
Attached homes share walls and paths, so the treatment is planned around the whole building where possible. Strata committees can arrange treatment for the complex rather than one unit at a time.
What Affects the Cost of a Chemical Termite Barrier
Every chemical termite barrier is quoted after an inspection, because two homes of the same size can need very different amounts of work. These are the main factors that affect the price.
Perimeter Length
Larger homes and longer external walls need more trenching and more termiticide.
Concrete and Paving
Paths, driveways and patios against the house are drilled and injected, which takes longer than trenching open soil.
Subfloor Access
Homes on piers need the subfloor treated as well, and tight or low access adds time.
Product and System
The termiticide chosen and whether a reticulation system is installed both affect the price and how the barrier is maintained later.
You’ll receive a written quote showing exactly what’s included before any work is booked.
Chemical Termite Barrier Safety and Standards
APVMA-Registered Termiticides
Termiticides used in Australia must be registered by the APVMA, and each product's label sets out how and where it can be used.
Applied to the Product Label
Application rates, drilling and treatment depth follow the product label. Keep children and pets off treated soil until it has dried.
Australian Standards
Termite management for existing homes is covered by AS 3660.2, and for new building work by AS 3660.1. New homes also need a durable notice recording the system used.
Chemical termite barriers for established Sydney homes, with an inspection first and written records after every job.
Keeping Your Chemical Barrier Working
A chemical barrier only works while the treated soil stays intact. Most barriers fail because something is dug, laid or built against the house after treatment.
Leave the Treated Soil Alone
Check with us before digging new garden beds against the walls, because digging disturbs the treated zone.
Keep Mulch Below the Slab Edge
Keep soil, mulch and timber sleepers below the slab edge and clear of weep holes.
Tell Us Before Paving or Renovating
New paths, decks, extensions or plumbing can cover or break the barrier, so let us know before work starts.
Fix Leaks Near the House
Repair leaking taps, downpipes and air-conditioner drains, because damp soil attracts termites.
Book Annual Inspections
Regular inspections pick up gaps, bridging or new termite activity before it becomes serious damage.
Keep Your Records
Keep the treatment details with your home documents, as they show when re-treatment is due.
Chemical Termite Barriers Across Sydney
We install chemical termite barriers for established homes across greater Sydney.
North West Sydney
Brick veneer homes and larger blocks across the Hills District, Blacktown and nearby suburbs.
South West Sydney
Established homes and growing estates around Campbelltown, Liverpool and surrounding areas.
North Shore and Northern Beaches
Older homes, timber decks and leafy gardens from Hornsby to the Northern Beaches.
Inner West and Eastern Suburbs
Federation cottages, terraces and homes with timber subfloors.
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Chemical Termite Barrier FAQs
Is a chemical termite barrier safe for children and pets?
Termiticides used for barriers are registered by the APVMA and applied into the soil by licensed technicians according to the label. Keep children and pets off treated areas until the soil has dried, and tell us about vegetable gardens or water tanks near the house so the treatment can be planned around them.
What's the difference between repellent and non-repellent barriers?
Do I need a termite inspection before a barrier is installed?
Will you need to drill through my concrete paths?
Will a chemical barrier get rid of termites already in my house?
How long does a chemical termite barrier last?
How much does a chemical termite barrier cost?
Can a chemical barrier be installed on a new build?
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