Northern Beaches · AS 3660.1
Perimeter and under-slab systems installed before the pour for Allambie Heights 2100 rebuilds sitting between Manly Dam Reserve, Garigal National Park and leafy Allenby Park.
Quick answer
Because Allambie Heights sits against bushland on three sides in a termite-prone part of the Northern Beaches, the NCC will not let a new home proceed to an Occupation Certificate without a compliant system in place. Installation happens to AS 3660.1 while the slab is still open. Paperwork for the certifier, covering both the fixed meter-box notice and the products used, follows once the install is finished.
Termite barriers in Allambie Heights
Allambie Heights is a residential suburb in postcode 2100, roughly 12.4 km north of the Sydney CBD and inside the Northern Beaches Council area. Largely built in the late 1940s and early 1950s, many of its streets still carry names from Second World War battles and Allied leaders, and the original housing stock now supports a steady run of knockdown rebuilds and renovations. Bush sits on three sides of the suburb, with Manly Dam Reserve to the south, Garigal National Park to the west and Allenby Park, with its creeks and small waterfalls, to the north, so every rebuild here is close to established bushland.
Living that close to protected bushland changes what a barrier has to do. Original post-war houses often have timber floors and roof framing that have had decades for termites to find, and a rebuild on that kind of block regularly turns up old stumps and root systems the demolition crew has cleared but the soil still remembers. Getting a compliant system in before the new slab closes up is the only reliable way to stop a colony working its way in from the reserve edge or the old garden beds around the original footprint.
Reviewed by Ismail, founder · Northern Beaches coverage · Updated September 2026 · More Northern Beaches suburbs
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Local conditions
Three conditions particular to Allambie Heights shape how we detail a barrier here.
Manly Dam Reserve, Garigal National Park and Allenby Park surround the suburb, and established colonies in their timber and leaf litter forage into the nearest yards. Rebuild sites near any of these edges get a full perimeter system rather than a partial run.
Homes built in the late 1940s and 1950s are now at the age where knockdown rebuilds are common, and demolition on these blocks regularly exposes old stumps and buried timber from the original garden. That material has to be accounted for in the soil treatment before the new slab goes down.
The small creeks and waterfalls running through Allenby Park keep the northern part of the suburb damp for longer after rain, and damp ground close to a slab edge is exactly the condition subterranean termites look for. We pay particular attention to drainage and slab-edge detailing on blocks near that creek line.
What we install here
We work on Allambie Heights knockdown rebuilds, new homes and granny flats on blocks close to Manly Dam Reserve, Garigal National Park and Allenby Park. Waffle pod and raft slabs are common, with suspended sections where a block steps down toward a reserve boundary. We provide one fixed quote from the plans covering the whole job, and we schedule our visit to land once the drainage rough-in is done but before the concreter arrives.
Local knowledge
Rebuild sites closest to Manly Dam Reserve and Garigal National Park get the most attention to the perimeter, since colony pressure from established bushland is highest along those edges. Blocks nearer Allenby Park in the north need careful drainage and slab-edge detailing because of the creeks and small waterfalls running through it. Away from the bush boundaries, closer to the suburb's centre, jobs are usually a more standard slab-edge and penetration install.
Northern Beaches Council handles certification for Allambie Heights, and it will not release an Occupation Certificate without two supporting items on file: signage fixed permanently in the meter box, and a certificate setting out the products, the coverage and the licensed installer. Both are finalised the day the barrier is completed, and we send product data sheets and maintenance advice along with them so the certifier's file is complete from the outset.
Allambie Heights at a glance
| Suburb | Allambie Heights, NSW 2100 |
|---|---|
| District | Northern Beaches |
| Distance from Sydney CBD | 12.4 km north |
| Certifying council | Manly Dam 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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Allambie Heights questions
Still unsure? Call and talk it through with a licensed technician.
+61 450 515 215Blocks backing onto Manly Dam Reserve or Garigal National Park usually warrant a continuous physical barrier around the whole boundary, not just spot treatment near the house, because established bushland colonies forage well beyond the reserve edge. We assess the specific boundary at quoting stage and detail the perimeter accordingly, particularly around any retaining work.
Old stumps and root systems from the original post-war garden are a common find on rebuild sites here, and they can feed a termite colony if left untreated near the new slab. We flag anything found during the site visit and factor it into the soil treatment before the under-slab system goes in.
Yes. The NCC classes a secondary dwelling as its own new building, so it needs its own compliant termite system, quite separate from whatever protection the existing house already has. On blocks near the creek line through Allenby Park we also check drainage carefully around the new structure, since damp ground close to a slab edge increases termite pressure over time.
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.
