High collar counts on repeat plans
Volume-builder house types run a full set of services through a compact slab. Collar numbers, not floor area, decide what a job takes, and every one has to be sealed before the pour inspection.
Quick answer
New homes across Blacktown and the north west need a termite management system. The NCC requires one in termite-prone areas and it is installed to AS 3660.1, with penetration collars and under-slab work completed before the slab pour. Your certifier receives the installation certificate and durable notice before the Occupation Certificate is issued.
Barriers across the Blacktown & North West
Estate builds and rebuilds across the Blacktown north west
The Blacktown and north west corridor covers 30 suburbs on this site, running from the established streets of Seven Hills, Lalor Park and Doonside out to the land releases at Marsden Park, Schofields and Riverstone. It is the most active new-build region we work in. Volume builders run tight programs with repeat house types, so a barrier stage that slips can hold up a pour and push a whole site back a week. We install for those builders, for owner-builders on estate lots and for families knocking down a 1970s house and starting again.
The ground here is mostly flat, open and recently worked, which changes what a barrier has to cope with. Estate lots are filled, compacted and built on quickly, neighbouring stages are still under construction, and landscaping follows within a season of handover. Established suburbs nearby bring the opposite problem: decades of garden soil, old stumps and buried timber under a fresh pad. Both come down to the same three openings in a slab, the penetrations, the edge and the joints, and all three close before the concrete arrives.
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Local conditions
What drives termite pressure in the north west
Three conditions shape how we detail barriers across the Blacktown corridor.
Creek corridors and reserves
Breakfast Creek, Eastern Creek and the reserves threaded between suburbs hold damp soil and fallen timber, which sustains colonies within foraging distance of new estate boundaries.
Landscaping straight after handover
Paving, turf and garden beds arrive within months on estate lots. Soil piled against a slab edge hides the inspection strip, so reticulation and a clear edge are planned from the start.
What we install here
Building across the Blacktown & North West
Across the north west we install for detached estate housing, duplex pairs, granny flats, townhouse rows and the occasional industrial pad. Waffle pod slabs dominate, so the work is collars on every penetration, the under-slab component the design specifies, then perimeter and cavity protection as brickwork goes up. Multi-lot builders get one program covering every dwelling with separate documentation per lot, and every quote is fixed from the plans with each stage listed.
- Under-slab membraneA termite-resistant sheet laid across the prepared ground before the pour.
- Penetration collarsCollars sealed to every pipe and conduit that comes up through the slab.
- Perimeter & slab edgeA barrier at the slab edge and into the cavity, so nothing can track up hidden.
- Chemical soil barrierAn APVMA-registered treated zone in the soil under and around the building.
- ReticulationA pipe network laid before paving so the treated zone can be topped up later.
- Piers & suspended floorsProtection for bearers, piers and suspended timber floors on sloping blocks.
Councils & certifiers
Getting signed off in the Blacktown & North West
Most of this corridor is certified through the City of Blacktown, with parts of the growth area falling to adjoining councils. Whoever holds your approval, the certifier will not issue an Occupation Certificate without two records: a certificate identifying the products installed, the areas protected and the licensed installer, and a permanent notice mounted in the meter box that records the system, the install date and the inspection interval recommended for the building.
Our run covers the older streets around Blacktown, Seven Hills, Toongabbie and Lalor Park, the middle-ring suburbs of Quakers Hill, Glendenning and Plumpton, and the newer release areas at Marsden Park, Schofields, Riverstone and The Ponds. Estate lots on the growth-area fringe get the most attention at the perimeter, since neighbouring stages are often still being built and ground next door is regularly disturbed.
Know your pour date?Send the slab plan and we will stage the barrier around your builder.
Blacktown & North West
Suburbs we install barriers in
Every suburb has its own page with the local ground conditions, the councils that certify there and the questions builders ask us most.
Acacia Gardens
Arndell Park
Bidwill
Blackett
Blacktown
Dean Park
Doonside
Eastern Creek
Emerton
Glendenning
Hassall Grove
Hebersham
Huntingwood
Kings Park
Lalor Park
Marayong
Marsden Park
Minchinbury
Mount Druitt
Plumpton
Quakers Hill
Riverstone
Rooty Hill
Ropes Crossing
Schofields
Seven Hills
Tregear
Vineyard
Whalan
Woodcroft
Systems we install
The right barrier for your slab and your site
Every photo below is from one of our own Sydney jobs. We look at your slab design, site and budget, then recommend a system or a combination.
01Under-slab membrane
A termite-resistant sheet laid over the whole prepared footprint before concreting, so termites can't come up through the slab anywhere.
02Penetration collars
A sealed collar on every pipe, conduit and service that passes through the slab. These gaps are the most common hidden way in.
03Slab edge & cavity barrier
Protection at the slab edge and into the wall cavity, which stops termites building hidden tunnels up the outside of the slab.
04Chemical soil barrier & reticulation
An APVMA-registered termiticide zone in the soil, with an optional pipe network under paving so it can be recharged later without digging.
05Suspended floors & piers
Barriers for bearers, piers and raised timber floors on sloping or elevated blocks, where there's no slab to protect.
06Retaining walls & tricky sites
Detailing for sandstone cuts, block retaining walls, step-downs and cut-and-fill sites, which are common across Sydney.
Why during construction
Do it now, or pay more to do less later
A retrofit can only treat around a finished house. A pre-construction system protects the parts nobody will ever be able to reach again.
Costs far less
A barrier put in during the build costs a fraction of a post-construction system, and far less than repairing termite damage.
Meets the NCC
New houses (Class 1) and outbuildings (Class 10) with termite-susceptible framing need a compliant termite management system.
Hidden gaps sealed
Pipe penetrations and slab joints can only be fully protected while they're still open, before the concrete goes in.
The whole footprint
An under-slab system covers ground that no treatment from outside the finished house can ever reach.
No OC delays
Your certifier needs the certificate and durable notice before issuing the Occupation Certificate. We supply both together.
Easier to sell
Documented, compliant protection gives buyers, building inspectors and lenders confidence when the home is sold.
Installation stages
Installed in stages that follow your build
A termite barrier isn't a single visit. Each part goes in when the site is ready for it, and we fit around your plumber, concreter and bricklayer.
Step 01Design / DA
Plans & fixed quote
Send your plans and slab details. We recommend a system and give you one fixed price that covers every stage.
Step 02Before the pour
Collars & under-slab
Collars go on every service once the plumber has set out, then the membrane or soil treatment is installed across the prepared site.
Step 03Walls going up
Slab edge & cavity
Perimeter and cavity protection is fitted as the brickwork or cladding goes up, so there's no unprotected gap at the slab edge.
Step 04Before landscaping
Final perimeter
Where it's specified, the chemical perimeter or reticulation system is completed around the building before paths and gardens go in.
Step 05Pre-OC
Notice & certificate
A durable notice goes in the meter box, and the installation certificate goes to your builder and certifier.
Step 06Handover
Owner advice
The owner gets simple care instructions and an inspection schedule so the system keeps doing its job for years.
Compare systems
Physical or chemical termite barrier?
Both can meet AS 3660.1. The best choice depends on your slab type, what surrounds the house and how much ongoing upkeep the owner wants.
Physical protection
Physical membrane, mesh or graded stone
No chemicals- How it worksA layer termites can't chew through, laid under the slab or around its edge.
- Life & upkeepDesigned to last as long as the slab while it isn't disturbed. No top-ups.
- Good fit forSlab-on-ground homes, and owners who prefer a non-chemical option.
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Natural, lasting defence
Entry-point protection
Penetration collars
- How it worksCollars sealed around each pipe and conduit that passes through the slab.
- Life & upkeepLong-lasting when fitted properly before concreting.
- Good fit forEvery slab, usually paired with a perimeter system.
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Small detail, big difference
Soil protection
Chemical soil barrier
- How it worksA treated zone of termiticide in the soil under and around the building.
- Life & upkeepDepends on the product label and soil conditions. Can be re-applied.
- Good fit forTighter budgets and some complex sites.
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Flexible and provable
Top-up protection
Reticulation system
Rechargeable- How it worksPipes laid before paving so termiticide can be pumped back into the soil.
- Life & upkeepCan be recharged for the life of the building without lifting paths.
- Good fit forHomes that will be surrounded by paving or landscaping.
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Protection you can renew
Most of the Sydney builds we work on use a combination: physical collars on every penetration plus a physical or chemical perimeter.
For builders & developers
Built around your program, not ours
Builders, developers and owner-builders get a fixed quote from plans, a technician who turns up when the site is ready, and paperwork that never holds up sign-off.
What we need to quote
Architectural or slab planSlab type: raft, waffle pod or suspendedSite addressRough pour dateRetaining wall & step-down details
Fitting in with your trades
- Collars in before the pour inspection
- Slab edge & cavity as walls go up
- Perimeter done before paving
Multi-unit & repeat work
Consistent pricing across lots, one point of contact and a full document set for every dwelling.
No certification delays
Missing durable notices and unclear install records are a common reason Occupation Certificates get held up. We hand everything over together so your certifier has it all in one go.
Paperwork
Everything you get at handover
A complete document set for the builder, the certifier and every future owner of the property.
Durable notice
A permanent notice in the meter box showing the system, install date, installer, any chemical's life expectancy and inspection advice.
For: certifier, owner, future owners
Installation certificate
Written confirmation of the system and products used, the areas protected and our licence details.
For: builder, certifier, owner
Product information
Details of the physical system or termiticide installed, including safety data sheets for any chemicals.
For: builder, owner
Care & inspection advice
How to keep the system working, plus the recommended inspection frequency under AS 3660.2.
For: homeowner
From real jobs
Recent termite barrier installations
Photos from our own Sydney sites, not stock images. Tap any photo to see it larger.
Membrane barrier across a large residential slab
Barrier work on a Sydney Harbour site
Installation through sandstone excavation
Perimeter barrier and sleeves on a new slab
Waffle pod formwork with collared penetrations
Membrane detailed against a retaining wall
Membrane sealed around a column
Protected slab edge with collar in place
Collared penetrations before the pour
Perimeter barrier on a completed slab edge
Pipe penetrations sealed into the membrane
Collars fixed through mesh before concreting
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Pricing
What sets the price of a barrier
Every build is different, so we don't guess. We price from your plans and give you one fixed written quote. Quoting is free.
- 01Slab area & perimeterBigger footprints need more material, more edge protection and more labour.
- 02System typeFull under-slab, perimeter-only, chemical and reticulation options are all priced differently.
- 03Number of penetrationsEach plumbing and electrical service through the slab needs its own collar.
- 04Site complexityRetaining walls, step-downs, sandstone and suspended floors add detailing.
- 05Number of visitsStaged installs follow your program. Multi-dwelling sites can often be combined.
- 06Site accessTight blocks, steep driveways and limited street frontage slow the set-out and add time on site.
After handover
Keeping the barrier working
A barrier only works while it stays intact and visible. Pass these on to the owner.
- Keep at least 75 mm of the slab edge exposed. Don't cover it with soil, mulch or paving.
- No garden beds or stacked timber against the house
- Keep weep holes clear of render and debris
- Fix leaking taps, downpipes and hot water units near the walls
- Ask the installer before drilling through the slab or adding pipes
- Book a timber pest inspection at least every 12 months
Annual timber pest inspection
Handed over recently? We inspect the barrier and the building every 12 months.
Free fixed quote
Protect your build
before the pour
Tell us about your build and get a clear, fixed price, fast. We usually reply within 30 minutes during business hours.
- Send your detailsBuild type, suburb and rough slab pour date.
- Share your plansSlab plan or architectural drawings, plus any retaining wall details.
- Get your fixed quoteOne written price covering every installation stage.
- Fast responseWithin 30 mins
- Licensed expertsQualified & insured
- Trusted locallyAcross Sydney
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Tell us about your build
within 30 minutes
Blacktown & North West questions
Answered
Can't see your question? Call and talk it through with a licensed technician.
+61 450 515 215Can you work to a volume builder's program in Blacktown?
Yes, and most of our north west work is exactly that. We confirm the collar stage against the plumber's set-out and attend before the pour inspection rather than on pour day, so the slab is never waiting on us. For repeat house types across multiple lots we price the program once and issue separate documentation for each dwelling.
Are new estate homes in the north west already protected?
Only if a compliant system was installed and documented during construction. A house in a new estate is not automatically protected because it is new, which is why the certificate and the durable notice matter. If you are buying, ask to see both, and check the inspection strip at the slab edge has not been covered by landscaping.
We are rebuilding on an older Blacktown block. What is different?
The soil. Blocks in suburbs like Seven Hills and Lalor Park have carried gardens for fifty years, leaving stumps, sleepers and buried timber that can already support a colony before your pad is prepared. On those sites the under-slab component and the soil treatment carry as much weight as the perimeter does.
Does a new home need a termite barrier in NSW?
In most cases, yes. The National Construction Code requires a termite management system for new houses and outbuildings in termite-prone areas where the primary building elements can be damaged by termites. Sydney is termite-prone, so the system is installed to AS 3660.1 and your certifier asks for the installation certificate and durable notice before the Occupation Certificate is issued.
What does a pre-construction barrier cost?
It depends on slab area, perimeter length, the number of pipe penetrations, the system chosen, site complexity and how many visits the build needs. Send us the plans and we return one fixed written quote covering every stage. Quoting is free.
Slab pour coming up?
Lock in your termite barrier before the concrete truck arrives
Send us your plans today for a fixed quote, or call and talk to a licensed technician about your site.
