The Hills District · AS 3660.1
Collars, under-slab membrane and perimeter protection fitted before the pour for Glenwood knockdown rebuilds, granny flats and duplex sites near Norwest and the Westlink M7 corridor.
Quick answer
Yes. A new home or rebuild in Glenwood needs a compliant termite management system, because the City of Blacktown is a termite-prone area under the NCC. Installation follows AS 3660.1 and happens before the concrete goes down, with collars fitted on every penetration. Afterwards a durable notice is fixed in the meter box, and an installation certificate is passed to your certifier so the Occupation Certificate can be issued.
Termite barriers in Glenwood
Glenwood was laid out in the City of Blacktown in the mid-1990s as a planned suburb of large double-storey houses, most with four or more bedrooms, sitting either side of the Westlink M7 and the North-West T-way. Thirty years on, the building activity here is mostly knockdown rebuilds on those original blocks, along with granny flats and the occasional duplex on the larger lots near Bella Vista and Norwest metro stations. Every one of those needs its own termite management system before the certifier will issue the Occupation Certificate, regardless of what protection the original house had.
That thirty-year gap matters more than it might seem. Chemical termite treatments from the 1990s have long since broken down, and two decades of garden growth have brought shrubs, mulch and tree roots hard up against brickwork on many blocks. When a rebuild opens the ground back up, it is the one chance to put a physical and chemical system in properly, rather than relying on whatever is left of the original protection. Getting collars and the perimeter detailed correctly before the pour is the only way to be sure the new slab is actually covered.
Reviewed by Ismail, founder · The Hills District coverage · Updated September 2026 · More The Hills District suburbs
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Local conditions
Three things drive termite risk on a Glenwood rebuild, and each changes how the barrier gets detailed.
Most Glenwood homes date to the 1990s, when the original chemical treatment has long since broken down. A rebuild is the first real chance in thirty years to install a proper physical and chemical system rather than patch what is left of the old one.
Two decades of garden growth mean shrubs, mulch beds and established trees often sit hard against the walls on these blocks. Landscaping like that has to be planned around the barrier, or it becomes the bridge that lets termites past it.
Parts of Glenwood back onto remnant bushland and the acreage fringe that still surrounds the newer estates nearby. Blocks on that edge get a fuller perimeter than an infill site in the middle of the suburb, because the colony pressure is higher.
What we install here
Most of our Glenwood work is knockdown rebuilds on the original 1990s house-and-land blocks, plus granny flats and duplex builds on the bigger lots. Waffle pod and raft slabs are standard here, and we fit collars on every plumbing and services penetration before the pour, then run the perimeter or under-slab system to suit the plans. Visits are staged around your builder's program so the barrier never holds up the slab date, and one fixed quote covers every stage through to the final certificate.
Local knowledge
Glenwood's rebuild activity is spread across its original estate streets, with the busiest pockets near Bella Vista and Norwest metro stations and along the North-West T-way corridor. Blocks backing onto the remnant bushland edge toward Parklea get extra attention to the perimeter, while sites near Westlink M7 and Valentine Sports Park are more often straightforward waffle pod jobs with a standard collar count.
Building work in Glenwood is certified through the City of Blacktown, and their sign-off depends on two documents. A durable notice has to be fixed inside the meter box describing the system that was installed, and an installation certificate needs to set out the products used, the areas protected and who carried out the work. We hand across both when the job is finished, together with maintenance guidance, so the Occupation Certificate is never waiting on us.
Glenwood at a glance
| Suburb | Glenwood, NSW 2768 |
|---|---|
| District | The Hills District |
| Distance from Sydney CBD | 28.8 km north-west |
| Certifying council | Sydney CBD Council |
| Standard applied | AS 3660.1 termite management systems |
| Installed | Before the slab pour, then staged through the build |
| Documents supplied | Installation certificate and durable notice |
| Typical builds covered | New homes, knockdown rebuilds, granny flats, duplexes, townhouses |
Systems we install
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.
01A termite-resistant sheet laid over the whole prepared footprint before concreting, so termites can't come up through the slab anywhere.
02A sealed collar on every pipe, conduit and service that passes through the slab. These gaps are the most common hidden way in.
03Protection at the slab edge and into the wall cavity, which stops termites building hidden tunnels up the outside of the slab.
04An APVMA-registered termiticide zone in the soil, with an optional pipe network under paving so it can be recharged later without digging.
05Barriers for bearers, piers and raised timber floors on sloping or elevated blocks, where there's no slab to protect.
06Detailing for sandstone cuts, block retaining walls, step-downs and cut-and-fill sites, which are common across Sydney.
Why during construction
A retrofit can only treat around a finished house. A pre-construction system protects the parts nobody will ever be able to reach again.
A barrier put in during the build costs a fraction of a post-construction system, and far less than repairing termite damage.
New houses (Class 1) and outbuildings (Class 10) with termite-susceptible framing need a compliant termite management system.
Pipe penetrations and slab joints can only be fully protected while they're still open, before the concrete goes in.
An under-slab system covers ground that no treatment from outside the finished house can ever reach.
Your certifier needs the certificate and durable notice before issuing the Occupation Certificate. We supply both together.
Documented, compliant protection gives buyers, building inspectors and lenders confidence when the home is sold.
Installation stages
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.
Send your plans and slab details. We recommend a system and give you one fixed price that covers every stage.
Collars go on every service once the plumber has set out, then the membrane or soil treatment is installed across the prepared site.
Perimeter and cavity protection is fitted as the brickwork or cladding goes up, so there's no unprotected gap at the slab edge.
Where it's specified, the chemical perimeter or reticulation system is completed around the building before paths and gardens go in.
A durable notice goes in the meter box, and the installation certificate goes to your builder and certifier.
The owner gets simple care instructions and an inspection schedule so the system keeps doing its job for years.
Compare systems
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
Entry-point protection
Soil protection
Top-up protection
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
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.
Consistent pricing across lots, one point of contact and a full document set for every dwelling.
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
A complete document set for the builder, the certifier and every future owner of the property.
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
Written confirmation of the system and products used, the areas protected and our licence details.
For: builder, certifier, owner
Details of the physical system or termiticide installed, including safety data sheets for any chemicals.
For: builder, owner
How to keep the system working, plus the recommended inspection frequency under AS 3660.2.
For: homeowner
From real jobs
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
Google reviews
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Pricing
Every build is different, so we don't guess. We price from your plans and give you one fixed written quote. Quoting is free.
After handover
A barrier only works while it stays intact and visible. Pass these on to the owner.
Free fixed quote
Tell us about your build and get a clear, fixed price, fast. We usually reply within 30 minutes during business hours.
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Glenwood questions
Still unsure? Call and talk it through with a licensed technician.
+61 450 515 215Not for a rebuild. Whatever chemical treatment went in during the 1990s has generally broken down by now, and a knockdown clears the site anyway. Once the slab is open again, the certifier wants a fresh termite management system that meets the current standard, so we start from scratch rather than assuming the old house still covers you.
Give us a call as soon as your builder has a rough pour date. The plumber's rough-in and the concreter's pour are the two milestones our visit sits between, since collars have to go on before the slab is closed up. Flag any bushland edge or mature trees close to the new slab line early, so we can price the perimeter properly.
Yes. A secondary dwelling gets its own termite management system, with collars on every penetration and a perimeter or under-slab system matched to the slab type. If the main house already has protection in place, we detail the new work to tie into it wherever the site allows, and issue the same notice and certificate for your certifier.
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.
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.
Nearby
Same crew, same staging and the same certifier-ready paperwork, right across the The Hills District.
Service areas
From the Eastern Suburbs and Inner West to the Hills, the Shire and the western growth corridors. Every suburb has its own page with the local ground conditions, the council that certifies the work and the questions builders there ask us.
Slab pour coming up?
Send us your plans today for a fixed quote, or call and talk to a licensed technician about your site.
