Northern Beaches · AS 3660.1
AS 3660.1 termite barriers for Curl Curl new homes and rebuilds between the ocean, Curl Curl Lagoon and Greendale Creek, postcode 2096, in the Northern Beaches Council area.
Quick answer
Sitting between the ocean and Curl Curl Lagoon within Northern Beaches Council's termite-prone territory, Curl Curl homes need a termite management system under the National Construction Code, on every new build or rebuild. AS 3660.1 sets the installation standard, wrapped up before the pour. Before sign-off, the certifier needs a durable notice fixed in the meter box, together with an installation certificate.
Termite barriers in Curl Curl
Curl Curl is a beachside suburb in postcode 2096, about 13.1 km north-east of the Sydney CBD, within Northern Beaches Council. Its beach is split into North and South Curl Curl and is known for surfing, with a saltwater rock pool at each end, while Curl Curl Lagoon and Greendale Creek form the northern boundary, separating it from North Curl Curl. The suburb is mostly family households, with local landmarks including Stewart House, the Harbord Bowling and Recreation Club and two campuses of Northern Beaches Secondary College. New building work here is largely knockdown rebuilds of existing family homes rather than new-estate development, since Curl Curl has been a settled beachside suburb for generations.
Curl Curl's ground conditions come from water on two fronts, the ocean on one side and the lagoon and creek on the other. Salt spray and humidity off the beach keep timber and sub-floor cavities damp, while Curl Curl Lagoon and Greendale Creek add still water and damp soil along the suburb's northern edge. That combination suits subterranean termites, which need moisture to move through the ground toward a slab. Streets rising from the beach often have homes with sub-floors and retaining walls that trap moisture on the slope, and a rebuild here needs the barrier planned around both the beach side and the lagoon side of the block, not just the standard edge treatment a drier suburb might get away with.
Reviewed by Ismail, founder · Northern Beaches coverage · Updated September 2026 · More Northern Beaches suburbs
Get my fixed quote
Local conditions
Three things shape how we plan a termite barrier on a Curl Curl block.
Salt spray and humidity from the beach, split between North and South Curl Curl, keep sub-floor cavities and timber damp for much of the year. Blocks closer to the ocean need particular attention to sub-floor ventilation alongside the barrier system itself.
The lagoon and creek along the suburb's northern boundary add still water and damp soil, conditions that suit subterranean termite movement through the ground. Blocks on that side of Curl Curl get the same full perimeter treatment as any waterside site.
Streets rising from the beach often need retaining walls that trap moisture against sub-floor spaces. Every retaining wall junction on a sloping Curl Curl block is a place the barrier needs to stay continuous, so we plan these from the site's own engineering.
What we install here
Most of our Curl Curl work is knockdown rebuilds of existing family homes, along with granny flats and the occasional duplex, since the suburb is a settled beachside area rather than new-release land. Waffle pod and raft slabs are common on flatter blocks, with suspended floors and retaining more likely on streets rising from the beach. A collar goes on every plumbing penetration before the concrete arrives, and we look at both the ocean side and the lagoon side of each block when planning the perimeter and any under-slab system.
Local knowledge
Cooksey Reserve, about 0.2 km from the suburb centre, and Curl Curl Beach, about 0.7 km away, sit close to many rebuild sites and bring salt air that keeps sub-floors and timber damp. Harbord Bowling and Recreation Club, also about 0.7 km off, marks the more built-up side of the suburb. Curl Curl Lagoon and Greendale Creek, forming the northern boundary toward North Curl Curl, are the features that most affect barrier planning on that side of the suburb, keeping the ground damper than on higher blocks further from the water.
Northern Beaches Council certifies Curl Curl development. Before granting the Occupation Certificate, its certifier wants a durable notice in the meter box together with an installation certificate covering the products, protected areas and installer. Since the suburb sits between the ocean and the lagoon, we also log sub-floor ventilation and drainage measures next to the barrier record itself, then pass over the finished paperwork with product information and maintenance guidance so nothing holds up sign-off.
Curl Curl at a glance
| Suburb | Curl Curl, NSW 2096 |
|---|---|
| District | Northern Beaches |
| Distance from Sydney CBD | 13.1 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
Google reviews
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.
Get a fixed quote
Curl Curl questions
Still unsure? Call and talk it through with a licensed technician.
+61 450 515 215Blocks close to Curl Curl Lagoon and Greendale Creek on the suburb's northern side tend to have damper, lower-lying ground, which suits subterranean termite movement more than blocks further from the water. We plan the perimeter and under-slab system with that in mind, and pay closer attention to drainage around the slab.
Indirectly, yes. Salt spray and humidity off North and South Curl Curl beaches keep sub-floor cavities and timber damp for much of the year, so we pay close attention to sub-floor ventilation alongside the AS 3660.1 system, particularly on blocks close to the beach itself where that moisture lingers longest.
Streets rising from the beach often need retaining walls that can trap moisture against sub-floor spaces, and each retaining wall junction is a place the barrier needs to stay continuous. We ask for the site's retaining and engineering plans early so these junctions are drawn and priced before work 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 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.
