Sutherland Shire · AS 3660.1
Termite collars, membrane and perimeter work timed to your pour date across Gymea's post-war streets, from the blocks near Gymea Shopping Village out toward Kareela Golf Course.
Quick answer
New homes in Gymea do need a termite management system: the Sutherland Shire is a recognised termite-prone area, so the NCC applies and the barrier is built to AS 3660.1. Every penetration gets a collar before concrete covers the slab. Two documents then go to the certifier, a durable notice for the meter box and a signed installation certificate, clearing the way to occupation.
Termite barriers in Gymea
Gymea shifted from rural land to a busy residential community mostly through the 1950s and 1960s, so much of its housing is post-war brick or fibro on backyard blocks close to Gymea Shopping Village and the station. Rebuild activity today is concentrated on those established post-war lots, with granny flats and occasional duplexes added on the larger blocks further from the village centre, and smaller infill projects appearing on subdivided lots closer to Gymea station. Every one of these builds needs a compliant termite management system in place, checked and certified, before an Occupation Certificate is issued.
Homes of that era were rarely built with the kind of termite protection required today, and sixty-plus years of garden growth since then have brought established trees, mulch beds and sub-floor timber close to the walls on many blocks. A knockdown rebuild clears the structure but not the decades of accumulated garden material in the soil, so a proper barrier fitted while the new slab is open matters more here than it would on a recently built house elsewhere in the shire. That is doubly true on the older fibro blocks, where sub-floor access and ventilation were never designed with a modern system in mind.
Reviewed by Ismail, founder · Sutherland Shire coverage · Updated September 2026 · More Sutherland Shire suburbs
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Local conditions
Three things drive termite pressure on a Gymea rebuild, and each shapes the barrier design.
Most existing Gymea homes predate current termite management requirements entirely, so a knockdown rebuild is often the first time the block has ever had a proper system installed, rather than a case of upgrading something that already existed.
Established trees, garden beds and sub-floor timber have built up against many Gymea houses over decades. That material is cleared during a rebuild, but the soil beneath it still needs treating properly before the new barrier goes in.
Blocks near Kareela Golf Course sit close to irrigated fairways, and the watered turf keeps nearby ground wetter than average, a condition termites actively seek out. We look closely at slab edges on properties within reach of that irrigation.
What we install here
Most of our Gymea work is knockdown rebuilds on post-war blocks, along with granny flats on the larger lots further from the village. Waffle pod and raft slabs are standard, and every penetration gets a collar once the plumber's rough-in is done. We schedule our visit to fit between that rough-in and the concreter's pour, and a single fixed quote from your plans covers the job through to the final paperwork.
Local knowledge
Our Gymea work is centred on the older residential streets around Gymea Shopping Village and the station, with a second cluster of rebuilds closer to Kareela Golf Course. Blocks near the golf course's irrigated turf get closer attention to slab-edge moisture, while sites nearer the village and Hazelhurst Arts Centre are more often standard post-war rebuilds with a typical collar count.
Building work in Gymea is certified by the Sutherland Shire. To sign off the Occupation Certificate, their certifiers want a durable notice mounted in the meter box plus a written record of the installation, naming the products used, the areas covered and who did the work. We prepare both as soon as the job is done and pass on advice for keeping the system in good order afterwards.
Gymea at a glance
| Suburb | Gymea, NSW 2227 |
|---|---|
| District | Sutherland Shire |
| Distance from Sydney CBD | 21.6 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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Gymea questions
Still unsure? Call and talk it through with a licensed technician.
+61 450 515 215Almost certainly not to a standard the certifier would accept today. Houses from that era were rarely built with a dedicated termite management system, so a knockdown rebuild is usually the first time the block gets one. We treat the site as a fresh start rather than assuming any old protection is still relevant.
Get in touch once your builder can name a rough pour date. Our window sits after the plumbing rough-in and before the pour, since that's when collars and any under-slab work can actually go in. Mention any established trees or garden beds close to the new slab line too, since those often need clearing first.
Irrigated turf and water features like those around the golf course can keep nearby soil damper than average, and moisture is one of the main things that draws foraging termites. Blocks within reach of that irrigation usually get closer attention to slab-edge detailing, though every site is still assessed individually against its own plans.
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.
