Northern Beaches · AS 3660.1
Under-slab membrane, collars and perimeter barriers staged to your builder's program across North Curl Curl 2099, from the flats by Curl Curl Lagoon to the terraced blocks climbing Wingala Hill.
Quick answer
Yes. North Curl Curl is a termite-prone part of the Northern Beaches, so a new home needs an NCC termite management system installed to AS 3660.1. Collars and under-slab work go in after the plumber's rough-in and before the pour. The durable notice for the meter box and an installation certificate for Northern Beaches Council are both needed before the Occupation Certificate.
Termite barriers in North Curl Curl
North Curl Curl sits about 14.2 km north-east of the CBD in postcode 2099, within Northern Beaches Council. Curl Curl Lagoon and Greendale Creek form its southern boundary, with parks and sports fields spread along the lagoon's northern side, while to the north the land climbs steeply over Wingala Hill toward Dee Why Head. Housing steps up those slopes in tiers, so a rebuild here is as likely to be a flat lagoon-edge block as a stepped hillside site with retaining walls between the house pad and the street. Both settings fall within the same termite-prone stretch of the Northern Beaches.
That split geography gives the suburb two quite different barrier jobs. Lower streets near the lagoon, creek and playing fields sit on damp, low ground where termites move easily through moist soil, so slab edges and drainage need careful detailing. Higher up, homes built into the hillside often have retaining walls and enclosed under-house storage, both of which can trap moisture and hide timber-to-ground contact from view. We treat each block on its own terms rather than running the same system regardless of where it sits. That distinction shapes both the pricing and the products we recommend for each site.
Reviewed by Ismail, founder · Northern Beaches coverage · Updated September 2026 · More Northern Beaches suburbs
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Local conditions
Three things drive termite pressure on a North Curl Curl block, and each changes how the barrier gets detailed.
Streets nearest Curl Curl Lagoon and Greendale Creek sit on low, damp ground that holds moisture year-round. Subterranean termites move easily through soil like that, so we give the slab edge and any garden-facing weep holes closer attention on these blocks.
Homes stepping up toward Dee Why Head are commonly built with retaining walls and enclosed under-house storage, both of which can trap moisture out of sight. Every retaining junction and step-down is a place a rushed barrier leaves a gap, so we detail those points from the engineering drawings before we start.
The higher blocks catch ocean winds and often have native gardens set among sandstone ledges, where established planting and buried timber can sit close to the slab. We factor that garden edge into the perimeter rather than treating the barrier as just a strip under the house footprint.
What we install here
We install on North Curl Curl new homes, knockdown rebuilds and granny flats on both the lagoon flats and the steeper Wingala Hill slopes. Waffle pod slabs are common lower down, with suspended floors and piers on the steeper blocks where retaining walls step the pad up from the street. You get one fixed written quote from the plans covering every stage, and we stage our visits around your builder's program so a barrier check never delays the pour.
Local knowledge
Our North Curl Curl work runs from the flats around Flora and Ritchie Roberts Reserve and the lagoon-side sports fields, where slab edge and drainage detailing matter most, up toward the steeper streets near Curl Curl Beach and Dee Why Head. Closer to Dee Why Grand Shopping Centre, sites are more often renovations or extensions on established blocks, where we check what protection, if any, the original build already has before detailing new work.
For a North Curl Curl Occupation Certificate, Northern Beaches Council wants a meter-box notice recording what termite system is in place, plus a certificate from the installer setting out the products, the area covered and their licence. We finish this paperwork off as soon as our stage of the work is done, so it is never the reason a North Curl Curl sign-off stalls.
North Curl Curl at a glance
| Suburb | North Curl Curl, NSW 2099 |
|---|---|
| District | Northern Beaches |
| Distance from Sydney CBD | 14.2 km north-east |
| 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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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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North Curl Curl questions
Still unsure? Call and talk it through with a licensed technician.
+61 450 515 215Yes, mainly around drainage and the slab edge. Ground near Curl Curl Lagoon and Greendale Creek stays damp for longer than the hillside blocks, and subterranean termites move easily through moist soil, so we check the drainage falls and any weep hole detailing closely on these lower sites. We explain what we find before recommending any product.
Every retaining wall and step-down is a junction where the barrier can be let down if it is improvised on site, so we work from the engineering drawings before pricing the job. Enclosed under-house storage on these stepped blocks also needs checking, since it can trap moisture out of view.
As soon as you have a rough slab date from the builder. Collars and any under-slab system go in after the plumber's rough-in and before the pour, so we lock our visit around that window. On stepped or retained sites, give us the engineering details early so the junctions are priced properly.
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.
