Northern Beaches · AS 3660.1
Full perimeter termite barriers detailed for high-rainfall bushland blocks across Forestville 2087, on streets where Garigal National Park runs along both the eastern and western boundaries.
Quick answer
Yes, new homes and rebuilds in Forestville need a termite management system under the NCC, given the suburb's termite-prone, bushland-fringed setting. AS 3660.1 sets the installation standard, and collars plus any under-slab work must be finished before the pour. A durable notice and an installation certificate then go to your certifier ahead of the Occupation Certificate being granted.
Termite barriers in Forestville
Forestville is a leafy suburb in postcode 2087, about 12 km north of the Sydney CBD, within Northern Beaches Council. It is bounded to the east and west by the bushland of Garigal National Park, with Middle Harbour forming its southern edge and Davidson Park nearby, and the area receives some of Sydney's highest rainfall. Village shops sit on Darley and Starkey Streets, with DIY and automotive businesses along Cook Street and The Forest Club a well-known local landmark. Many of the original 1950s and 1960s timber soldier cottages have been replaced by larger project homes and townhouses, with newer builds increasingly designed to sit comfortably against the surrounding bush.
Bush on two sides and rainfall well above the Sydney average make Forestville one of the more demanding suburbs to get a termite barrier right in. Subterranean colonies forage out from Garigal National Park through the soil, and the high rainfall keeps ground and sub-floor conditions damp for longer after storms than in drier inland suburbs. Older timber soldier cottages that have not yet been rebuilt are especially exposed, while new project homes and townhouses replacing them need a full, properly detailed system from the outset rather than a minimal edge treatment.
Reviewed by Ismail, founder · Northern Beaches coverage · Updated September 2026 · More Northern Beaches suburbs
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Local conditions
Three factors combine to push termite pressure higher in Forestville than in many other Sydney suburbs.
Bushland runs along both the eastern and western edges of Forestville, giving established termite colonies a direct path into gardens on either side of the suburb. Blocks near either boundary get a full perimeter system rather than a partial one.
Forestville records some of Sydney's highest rainfall, which keeps soil and sub-floor timber damp for longer after each storm. That extended moisture period is exactly what subterranean termites look for, so drainage and ventilation are built into the barrier plan.
Many original 1950s and 1960s timber cottages are being replaced by larger homes and townhouses. These rebuild sites often carry decades of garden growth and buried timber that need clearing and soil treatment before the new slab and barrier go in.
What we install here
We install termite barriers for Forestville new homes, knockdown rebuilds replacing older soldier cottages, and townhouse sites, along with granny flats on larger established blocks. Waffle pod and raft slabs are common, with suspended floors used on sites that fall toward the bushland boundary. Pricing is set as one fixed figure from the plans, and extra time is built into the schedule on blocks bordering Garigal National Park, where the perimeter needs closer detailing before the pour.
Local knowledge
Casuarina Reserve sits close to residential streets, and its leaf litter and undergrowth show just how near the bush comes to some Forestville homes. Nungara Reserve, further from the centre, is bushland where established termite activity is well known locally, and blocks near it get extra attention in the perimeter design. Forestway Shopping Centre marks the suburb's commercial edge, while Roseville Golf Course and Davidson Park sit toward the Middle Harbour boundary, where high rainfall and bushland proximity most affect how we plan a barrier.
Northern Beaches Council certifies building work in Forestville, and on blocks bordering the national park the certificate also needs to reflect the fuller perimeter installed. Certifiers require a durable notice describing the system, fixed inside the meter box, alongside an installation certificate that names the products, the areas covered and who carried out the work. We provide both before the Occupation Certificate is issued.
Forestville at a glance
| Suburb | Forestville, NSW 2087 |
|---|---|
| District | Northern Beaches |
| Distance from Sydney CBD | 12.0 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
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.
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Forestville questions
Still unsure? Call and talk it through with a licensed technician.
+61 450 515 215Yes, generally. Colony pressure from established bushland is different to what comes from a neighbouring garden, so blocks on either the eastern or western boundary usually need a full perimeter system rather than a partial one, often with a reticulation line added where paving or landscaping will later sit over the treated zone close to the fence.
It affects the drainage and ventilation details around the barrier rather than the core system itself. Because the suburb holds moisture in the soil and sub-floor for longer after rain than drier areas, we pay close attention to how water moves away from the slab edge, since damp timber over an extended period suits termite activity.
Yes, and it is often the best opportunity to do so properly. Once the original cottage is demolished, the site is cleared of old timber and treated before the new slab goes down, with collars fitted to every penetration and a durable notice and certificate supplied for the certifier, the same as any other new build.
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.
