Concrete Slab Edge Rebate Building Codes & Rules
- Discover how rebates and setdowns provide crucial water protection and avoid costly mistakes in your building projects. Learn key tips for success.
AS 3660.1:2014, 4.4
Termite ManagementAS 3660.1:2014, 4.4
- ≥ 75mm exposed Face
- Sheet or Granular system
AS 2870:2011, 5.3.4
External WallAS 2870:2011, 5.3.4
- Masonry Cavity
- Veneer Construction
AS 3660.1:2014, 4.4
AS 3660.1:2014, 4.4
DPC /
Flashing
Bonded Zone
Termite Sheet
- copyFitment req'd
Edge Rebate
- copyAS 2870:2011, 5.3.4 (b)
FitmentsAS 2870:2011, 5.3.4 (b)
- Allow reduction in horizontal thickness
- R10 or N10 Cranked Bar
- ≤ 900mm spacing
- ≥ 200mm thk not required
Finished Ground
AS 2870:2011, 5.3.4
External WallAS 2870:2011, 5.3.4
- Masonry Cavity
- Veneer Construction
AS 2870:2011, 5.3.4
External WallAS 2870:2011, 5.3.4
- Masonry Cavity
- Veneer Construction
AS 3660.1:2014, 4.4
Termite ManagementAS 3660.1:2014, 4.4
- ≥ 75mm exposed Face
- Sheet or Granular system
AS 3660.1:2014, 5.3.8.2
Edge Rebate
AS 3660.1:2014, 5.3.8.2
Earth
Vapour Barrier
Vapour Barrier
Earth
Flashing
AS 3700:2018, 4.7.2
WeepholesAS 3700:2018, 4.7.2
- ≥ 1.2m CTS Intervals
WH
Sand Blinding
Vapour Barrier
Sand Blinding
Sand Blinding
Termite Sheet
AS 2870:2011, 5.3.4 (b)
AS 3660.1:2014, 4.4
AS 2870:2011, 5.3.4
AS 2870:2011, 5.3.4 (f)
AS 2870:2011, 5.3.4 (c)
Edge Rebate
AS 2870:2011, 5.3.4
NCC 2022 HP, 4.2.9 (a)
AS 2870:2011, 5.3.4 (f)
Edge Beam
Bonded Zone
DPC /
Flashing
Finished Ground
AS 2870:2011, 5.3.4 (b)
≥ 150 to 200AS 2870:2011, 5.3.4 (b)
AS 2870:2011, 5.3.4 (c)
Vapour Barrier
- Continuous under Beams & Pods[1]
- Turn up to Ground Level at Slab Edges[2]
- Protect from & repair any punctures[3]
Moisture Control
NCC 2022 V1
All Building Classes
NCC 2022, F1D7 & Part 4.2.8 [2019 F1.10, 3.2.2.6]
May 2023
AS 2870:2011, 5.3.3.2 (a)
AS 2870:2011, 5.3.3.2 (a) (i)
AS 2870:2011, 5.3.3.2 (a) (ii)
AS 2870:2011, 5.3.3.4 (b)
AS 2870:2011, 5.3.3.4 (a)
AS 2870:2011, 5.3.3.4 (c)
NCC 2022 HP, 4.2.8
NCC 2022 Vol 1, F1D7
- Construction of Footings & Slabs to comply with NCCAS 2870:2011, 5.3.3.2 (a)AS 2870:2011, 5.3.3.2 (a) (i)
- Material
- 0.2mm thk Polyethylene FilmAS 2870:2011, 5.3.3.2 (a) (ii)
- Medium impact resistance Vapour BarrierAS 2870:2011, 5.3.3.4 (b)
- High impact resistance Damp Proofing MembraneAS 2870:2011, 5.3.3.4 (a)
- Installation
- Underlay entire bottom surface of Slab & BeamsAS 2870:2011, 5.3.3.4 (c)
- ≥ 200mm lap at all JointsNCC 2022 HP, 4.2.8
- Taped or lapped around close-fitting Sleeve of penetrationsNCC 2022 Vol 1, F1D7
- Where punctured, fully seal with more Polyethylene film & tape
AS 2870:2011, 5.3.3.4 (a)
AS 2870:2011, 5.3.3.4 (a)
AS 2870:2011, 5.3.3.3 (c)
- Continuous under Beams & PodsAS 2870:2011, 5.3.3.4 (a)
- Turn up to Ground Level at Slab EdgesAS 2870:2011, 5.3.3.4 (a)
- Protect from & repair any puncturesAS 2870:2011, 5.3.3.3 (c)
Concrete Benchmark
Concrete Cover
- ≥ 30mm over membrane[1]
- ≥ 40mm unprotected ground[2]
- ≥ 20mm internal surface[3]
- ≥ 40mm external exposure[4]
Concrete COVER
NCC 2022 V5
All Building Classes
NCC 2022 4.2.11 [2019 3.2.3.2]
May 2023
AS 3600:2018, 4.10.3.2
AS 3600:2018, 4.3.1 (c)
NCC 2022 HP, 4.2.11
- Concrete must comply with the NCCAS 3600:2018, 4.10.3.2
- Cover for standard Formwork & compaction as per tableAS 3600:2018, 4.3.1 (c)
- Add thickness where cast against ground
- Embedded elements must be protected from corrosion or deteriorationNCC 2022 HP, 4.2.11
NCC 2022 HP, 4.2.11 (5) (b)
NCC 2022 HP, 4.2.11 (5) (a)
NCC 2022 HP, 4.2.11 (5) (c)
NCC 2022 HP, 4.2.11 (5) (d)
- ≥ 30mm over membraneNCC 2022 HP, 4.2.11 (5) (b)
- ≥ 40mm unprotected groundNCC 2022 HP, 4.2.11 (5) (a)
- ≥ 20mm internal surfaceNCC 2022 HP, 4.2.11 (5) (c)
- ≥ 40mm external exposureNCC 2022 HP, 4.2.11 (5) (d)
Termite Management
- Termite control required for Ground Level floor junctions
- ≥ 75mm slab exposure above the external finished floor level to allow easy detection of termites[1]
Durable Notice RULES
NCC 2022 V1
All Building Classes
NCC 2022, 3.4.3
May 2023
NCC 2022 HP, 3.4.3
NCC 2022 HP, 3.4.3
NCC 2022 HP, 3.4.3 (a)
NCC 2022 HP, 3.4.3 (b)
NCC 2022 HP, 3.4.3 (c)
NCC 2022 HP, 3.4.3 (d)
- Permanently fixed to the BuildingNCC 2022 HP, 3.4.3
- Located conspicuously, such as on a Meter Box or the likeNCC 2022 HP, 3.4.3
- Must indicate
- Termite Management System usedNCC 2022 HP, 3.4.3 (a)
- Date of installationNCC 2022 HP, 3.4.3 (b)
- Life expectancy, as listed on approved labelNCC 2022 HP, 3.4.3 (c)
- Manufacturer's recommendations of future inspectionsNCC 2022 HP, 3.4.3 (d)
Termite RISK
NCC 2022 V3
Class 1 & 10
NCC 2022, H1D3 & HP3.4.1 [2019 3.1.4.2]
May 2023
NCC 2022 HP, 3.4.1(2)
NCC 2022 HP, 3.4.1 (1) (b)
NCC 2022 HP, 3.4.1
- Termite Management System Required ifNCC 2022 HP, 3.4.1(2)
- Location is identified at Risk of Attack, &
- Any Primary Building Element is susceptible
- Primary Building Elements areNCC 2022 HP, 3.4.1 (1) (b)
- Any member designed to take Loads
- Wall, Roof, Ceiling, Floor, Ramp or Stair Framing
- Any bracing or other framing members
- Materials not susceptible to attackNCC 2022 HP, 3.4.1
- Metals
- Concrete
- Masonry
- Fibre-reinforced Concrete
- Naturally resistant Timber
- Preservative-treated Timber
Termite MANAGEMENT
NCC 2022 V5
Class 1 & 10
NCC 2022 H1D3 & HP3.4.2 [2019 3.1.4.3]
May 2023
NCC 2022 HP, 3.4.2
AS 3660.1:2014, 4.4
NCC 2022 Vol 2, H1D3
- Termite Management compliant to the NCCNCC 2022 HP, 3.4.2
- Inspection ZoneAS 3660.1:2014, 4.4NCC 2022 Vol 2, H1D3
- ≥ 75mm exposed Concrete Face
- Smooth surface, free of Ripples or Honeycombing
- Tiling, Render, Vapour Barrier, Flashings, Structures & the like, not allowed to bridge this Zone
AS 3660.1:2014, 4.4
- Termite control required for Ground Level floor junctions
- ≥ 75mm slab exposure above the external finished floor level to allow easy detection of termitesAS 3660.1:2014, 4.4
Concrete Mix
- N20 Grade to AS 1379[1]
- ≥ 20 Mpa strength at 28 days[2]
- ≤ 20mm aggregate size[3]
- 100mm slump[4]
- Properly compacted[5]
Concrete Mix RULES
NCC 2022 V4
All Building Classes
NCC 2022, 4.2.10 [2019 3.2.3.1]
May 2023
NCC 2022 HP, 4.2.10
- Concrete to comply with NCCNCC 2022 HP, 4.2.10
- Mixing & Delivery
- ≤ 1 ½ hrs complete discharge from Concrete truck upon Cement hydration unless a retarder is used
- Compaction by vibration
- To remove air pockets
- Improve contact with Reinforcement & Formwork
- Enhance durability
- Avoid over-vibrating
- Slab Edges
- Proper finishing & curing of edges improves resistance to moisture damage
- Chemical Curing
- Determine if surface finish adhesive to be used is compatible with chemical curing methods
NCC 2022 HP, 4.2.10 (a) (i)
NCC 2022 HP, 4.2.10 (a) (ii)
NCC 2022 HP, 4.2.10 (a) (iii)
NCC 2022 HP, 4.2.10 (c)
AS 2870:2011, 5.3.1
- N20 Grade to AS 1379NCC 2022 HP, 4.2.10 (a) (i)
- ≥ 20 Mpa strength at 28 daysNCC 2022 HP, 4.2.10 (a) (ii)
- ≤ 20mm aggregate sizeNCC 2022 HP, 4.2.10 (a) (iii)
- 100mm slumpNCC 2022 HP, 4.2.10 (c)
- Properly compactedAS 2870:2011, 5.3.1
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