Sutherland Shire · AS 3660.1
Perimeter barriers and under-slab systems fitted before the pour on Oyster Bay's post-war blocks, climbing from the Georges River foreshore up toward Caravan Head Bushland Reserve.
Quick answer
Yes. Oyster Bay sits on reclaimed and foreshore ground beside the Georges River, so a new home or rebuild needs an NCC termite management system installed to AS 3660.1. Collars and under-slab work go in before the concrete pour. The durable notice for the meter box and an installation certificate for Sutherland Shire are both needed before the Occupation Certificate is issued.
Termite barriers in Oyster Bay
Oyster Bay lies on the southern bank of the Georges River in postcode 2225, about 19.0 km south-west of the CBD, within Sutherland Shire. The suburb takes its name from the oysters once found in the bay, and its edges take in Coronation Bay's mangroves and Carina Bay to the west, with Caravan Head Bushland Reserve covering the northern part of the suburb. Most of Oyster Bay was developed after the Second World War, so housing is largely post-war family homes on streets that climb away from the water, reached in places by footpaths and steps built in the 1930s.
Oyster Bay Oval itself was reclaimed from mangroves in the 1960s, and that history says something about the ground a rebuild here is likely sitting on. Reclaimed and foreshore land near the mangroves can carry damp, filled soil that holds moisture longer than a typical block, while Caravan Head Bushland Reserve to the north brings established colonies foraging from fallen timber and leaf litter. Streets that climb steeply from the water also mean retaining walls are common, so a barrier needs to account for both the dampness below and the terracing above.
Reviewed by Ismail, founder · Sutherland Shire coverage · Updated September 2026 · More Sutherland Shire suburbs
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Local conditions
Three things push termite pressure higher on an Oyster Bay block than on suburbs further from the river.
With Oyster Bay Oval itself reclaimed from mangroves in the 1960s, some of the suburb's lower ground carries filled, damp soil that holds moisture for longer than a typical block. We give the under-slab membrane and slab edge extra attention on foreshore properties for exactly that reason.
The reserve covers the northern part of Oyster Bay, and established colonies in its fallen timber and leaf litter forage into nearby gardens. Blocks on that edge get a full perimeter system, with particular care at any junction where the slab meets the reserve boundary.
Streets climbing away from the water often carry retaining walls linking older post-war homes to the road above. Rebuilds on these blocks need every retaining junction and step-down drawn and priced before work starts, since that is where a rushed barrier is most likely to leave a gap.
What we install here
We work on Oyster Bay knockdown rebuilds and renovations on post-war blocks across the suburb, from the foreshore near Coronation Bay up toward Caravan Head Bushland Reserve. Suspended floors and piers are common on the steeper streets, alongside waffle pod slabs on the more level pads closer to Como Road. You get one fixed written quote from the plans covering every stage, and we attend around your plumber's rough-in and the concreter's pour date.
Local knowledge
Our Oyster Bay work runs from the foreshore near Green Point Reserve and Struen Marie Reserve, where damp, reclaimed ground shapes the slab edge detailing, up toward Caravan Head Bushland Reserve, where the perimeter needs to extend further along the bush boundary. Around Como station and Kareela Golf Course, sites are more often renovations on established homes closer to the shops and the golf course's irrigated fairways.
Sutherland Shire is the certifying authority for Oyster Bay, and it wants a durable notice screwed inside the meter box plus a certificate from the installer setting out the products, the coverage and the licence, before it grants an Occupation Certificate. We hand both over as soon as our stage of an Oyster Bay rebuild is done, ready for whatever comes next in the approval process.
Oyster Bay at a glance
| Suburb | Oyster Bay, NSW 2225 |
|---|---|
| District | Sutherland Shire |
| Distance from Sydney CBD | 19.0 km south-west |
| Certifying council | Across Sutherland Shire |
| 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
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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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Oyster Bay questions
Still unsure? Call and talk it through with a licensed technician.
+61 450 515 215Yes. Ground near the old mangroves, including areas like the reclaimed Oyster Bay Oval, can carry damp, filled soil that holds moisture longer than a typical block. We check the fill and drainage before pricing the job and detail the under-slab membrane and slab edge more carefully on these properties.
They do. Established colonies in the reserve's fallen timber and leaf litter forage into nearby gardens, so we run a full perimeter system on blocks near that edge rather than a partial strip, with extra attention at any junction where the slab meets the bush boundary. We also look at any retaining wall between the house and the reserve boundary.
Retaining walls are common where streets climb away from the water, and every retaining junction is a place a barrier can be let down if it is not planned properly. We work from the engineering drawings on stepped sites and price those junctions before work starts. Getting these details from the engineer early avoids surprises once excavation starts.
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 Sutherland Shire.
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.
