Northern Beaches · AS 3660.1
Perimeter termite systems detailed for plateau blocks across Frenchs Forest 2086, from freestanding homes bordering Garigal National Park to apartment sites near Northern Beaches Hospital.
Quick answer
This Frenchs Forest plateau counts as termite-prone under the NCC, so homes and apartment builds here require a termite management system. AS 3660.1 governs the install, with collars and any under-slab work finished ahead of the pour. The durable notice and installation certificate are then organised for your certifier before the Occupation Certificate.
Termite barriers in Frenchs Forest
Frenchs Forest sits on a high plateau about 13.6 km north of the Sydney CBD, in postcode 2086 and Northern Beaches Council. Unlike the beach suburbs to the east, this is ridge-top country, with Warringah Road, Forest Way and the Wakehurst Parkway crossing it and Garigal National Park wrapping around the bushland edges. Most housing is freestanding family homes on generous blocks, and the rezoned land around Northern Beaches Hospital is now adding apartment buildings to a suburb that was previously dominated almost entirely by detached houses on their own blocks.
That plateau setting and the rezoned hospital precinct both shape how we plan a barrier here. Streets backing onto national park or reserve bushland see more termite activity moving in from native timber, and the plateau's higher rainfall keeps garden soil damp for longer than in lower-lying suburbs. Around the hospital precinct, new apartment buildings bring shared basements and stacks of service penetrations closer to what we see in dense town centres, a different job to a freestanding family home on a bush-edge block. We work out which of those conditions applies to a site before recommending a system.
Reviewed by Ismail, founder · Northern Beaches coverage · Updated September 2026 · More Northern Beaches suburbs
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Local conditions
Frenchs Forest's ridge-top setting and its growing hospital precinct create three distinct drivers of termite pressure.
Streets that back onto Garigal National Park or local reserve bushland see termite activity moving in from native timber and fallen branches. These boundary blocks get a full perimeter system, with extra attention where fences and garden beds meet the bush.
Sitting higher than the beach suburbs to the east, Frenchs Forest holds more rainfall in its garden soil for longer after storms. That extended moisture keeps conditions favourable for subterranean termites, so drainage around the slab edge is part of the barrier design.
Rezoned land around Northern Beaches Hospital is bringing apartment buildings with shared basements and multiple service risers on a single slab. We map the collar layout and plan inspection access from the drawings before pricing the job.
What we install here
We install termite barriers for Frenchs Forest new homes on generous freestanding blocks, knockdown rebuilds, granny flats and the newer apartment builds going up around the Northern Beaches Hospital precinct. Waffle pod and raft slabs make up most house sites, and the hospital-precinct apartment builds typically need larger perimeter runs and more penetrations. Pricing is fixed from the plans as a single figure, with additional allowance built in for blocks bordering national park bushland, where the perimeter needs closer detailing.
Local knowledge
Jindabyne Reserve and Wareham Reserve sit close to residential streets, their leaf litter and fallen timber a sign of how near the bush sits to some Frenchs Forest homes. Forestway Shopping Centre marks the suburb's commercial edge, where food waste and new building work bring a different set of considerations closer to what a town centre sees. Warringah Aquatic Centre sits near the Northern Beaches Hospital precinct, an area where apartment construction has picked up in recent years.
Northern Beaches Council handles certification for Frenchs Forest, and for the apartment builds rising around the hospital precinct the certificate needs to reflect the larger shared perimeter installed. A durable notice recording the system is fixed inside the meter box, and an installation certificate names the products used, the coverage area and who carried out the install. We supply both documents before the Occupation Certificate.
Frenchs Forest at a glance
| Suburb | Frenchs Forest, NSW 2086 |
|---|---|
| District | Northern Beaches |
| Distance from Sydney CBD | 13.6 km north |
| Certifying council | Northern Beaches 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
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Real, verified reviews from homeowners and businesses we've worked with.
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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Frenchs Forest questions
Still unsure? Call and talk it through with a licensed technician.
+61 450 515 215Generally yes. Bushland boundary blocks face colony pressure from established native timber rather than a neighbouring garden, so a full perimeter system is usually the better choice for these sites, with careful attention where garden beds, fences and any retaining structures meet the reserve edge, since that is where a gap is most likely to be missed.
The NCC requirement is the same, but the detailing differs. Apartment slabs around the hospital precinct typically carry a shared basement and multiple service risers, so we map the collar layout and inspection access from the full set of plans first, rather than treating it as a routine house-sized job.
Timing is set by your builder's pour date. We plan the visit so collars and any under-slab system are finished once the plumber's rough-in is done, always ahead of the concrete. On blocks against the national park, mention that early so we can plan the fuller perimeter those sites typically need.
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 Northern Beaches.
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.
