Zero Threshold / Accessible Building Codes & Rules
- Zero Threshold / Accessible Tools™ simplifies the National Construction Code (NCC) with interactive graphics, including deemed to comply & best practices.
Fall
M
Adhesive
Underlay / Insulation
≥ 1:80
Fall
Substrate
Sealant
AS 3958.1:2007, A.2.3 (a)
Mortar Bedding
- Reinforced if ≥ 50mmAS 3958.1:2007, A.2.3 (a) thk
AS 4654.2:2012, 2.5.2
≥ 1:100AS 4654.2:2012, 2.5.2
M
M
Waterstop
returns
at Reveal
Removable Grate
Waterstop
- Rebate, or
- Waterstop angle
M
Internal Finished Floor
Fall
Sealant
M
M
Non-shrink Grout
Manufacturer's System Requirement
Drainage ChannelManufacturer's System Requirement
- Proprietary system
- Install to Manufacturer's Requirements
- Secondary Drainage only
Fillet
Puddle Flange
Floor System
Foam Filler
Connect to Stormwater
Specify Outlet location
Accessible Compliant Door or Window Sill
Seal under Packing & over Screw Heads
AS 1428.1:2009, 7.2 (a)
≥ 1:80
End Cap
- Fully seal to sub-sill
- ≥ 6mm gap to reveal with backing rod & sealant
End Cap WATERPROOFING
NCC 2022 V1
null
- Fully seal to sub-sill
- ≥ 6mm gap to reveal with backing rod & sealant
Tile
AS 1428.1:2009, 10.7.2 (a)
Drains into Channel
Membrane
Outlet
Fillet
Brick Veneer
Brick Veneer BEST PRACTICE
NCC 2022 V1
- Use termite-resistant structure
- Such as Treated Timber or Steel
- This eliminates the need for Slab Edge Exposure
- Use Zero Threshold, including Strip Drain, for doorways provided that
- 3mm lip water check is always applied
- ≥ 20mm Set down at base of Wall
- Adjust levels and establish the paving level below the set down base
- Give careful attention & collaborate with the concreter or paver
- Especially when transitioning from a strip drain to the paving areas
Membrane Height
- Height varies with wind class[1]
Height RULES
NCC 2022 V7
All Building Classes
NCC 2022 F1D5, H2D8, & HP10.2 [2019 F1.4, 3.8.1.2, 3.8.1.3]
May 2023
AS 4654.2:2012, 2.8.1
NCC 2022 Vol 1, F1D5
NCC 2022 Vol 2, H2D8
NCC 2022 HP, 10.2.1
- Building elements in Wet Areas to be Waterproof or Water Resistant to the NCCAS 4654.2:2012, 2.8.1NCC 2022 Vol 1, F1D5NCC 2022 Vol 2, H2D8
- Measured from top of finished external level to height of MembraneNCC 2022 HP, 10.2.1
- FFL in the case of a finish on a Screed Bed, or
- Base of Linear Drain at Zero Threshold Entry, or
- Substrate Membrane where Pavers on Pedestals
- Height sufficient to prevent wind-driven water entry
AS 4654.2:2012, 2.8.1.1
- Height varies with wind classAS 4654.2:2012, 2.8.1.1
Sub-sill on Hob
Concrete Screeds
Termite Management
- Zero Thresholds & other flush Entry points will breach a Termite Management System
- Non-termite susceptible Primary Building Elements must be used[1]
Termite RISK
NCC 2022 V1
All Building Classes
NCC 2022, H1D3 & 3.4.1 [2019 3.1.4.2]
May 2023
NCC 2022 HP, 3.4.1 (1) (a)
NCC 2022 HP, 3.4.1 (1) (b)
NCC 2022 HP, 3.4.1(2)
- Termite Management System Required if
- Location is identified at Risk of Attack, &NCC 2022 HP, 3.4.1 (1) (a)
- Any Primary Building Element is susceptibleNCC 2022 HP, 3.4.1 (1) (b)
- Primary Building Elements are
- 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(2)
- Metals
- Concrete
- Masonry
- Fibre-reinforced Concrete
- Naturally resistant Timber
- Preservative-treated Timber
NCC 2022 HP, 3.4.1
- Zero Thresholds & other flush Entry points will breach a Termite Management System
- Non-termite susceptible Primary Building Elements must be usedNCC 2022 HP, 3.4.1
Sub-sill with Set Down
Fixings
Fixing BEST PRACTICE
NCC 2022 V1
Fixing RULES
NCC 2022 V3
All Building Classes
NCC 2022 J5D5, H6D2, & HP13.4.4 [2019 J3.4, 3.12.0, 3.12.3.3]
May 2023
NCC 2022 HP, 13.4.4
NCC 2022 Vol 1, J5D5 (1)
NCC 2022 Vol 2, H6D2 (1)
AS 4654.2:2012, 2.8.3
- Building envelope sealing in compliance to the NCCNCC 2022 HP, 13.4.4NCC 2022 Vol 1, J5D5 (1)NCC 2022 Vol 2, H6D2 (1)
- SealAS 4654.2:2012, 2.8.3
- Between sill, packer, & Membrane
- Over fixing head
AS 4654.2:2012, 2.8.3
Manufacturer's System Requirement
- ≤ 600mmAS 4654.2:2012, 2.8.3 CTS
- Seal to prevent water ingressManufacturer's System Requirement
Substrate
Substrate PREPARATION
NCC 2022 V1
Substrate PREPARATION
NCC 2022 V6
All Building Classes
NCC 2022 F2D2, S26C3, & HP10.2.9 [2019 F1.7]
May 2023
AS 3740:2021, 4.4.1
NCC 2022 Vol 1, F2D2
NCC 2022 Vol 1, S26C3 (1)
NCC 2022 HP, 10.2.9
- Building elements in Wet Areas to be Waterproof or Water Resistant to the NCCAS 3740:2021, 4.4.1NCC 2022 Vol 1, F2D2NCC 2022 Vol 1, S26C3 (1)
- All surfaces to be prepared for Waterproofing System adhesionNCC 2022 HP, 10.2.9
- Smooth, dust-free, clean & dry surface
- Fill voids
- Grind smooth any protrusions
- Free of formwork deformity
- Prime substrate to prohibit pin-holing during the membrane curing process
- Moisture test & apply primer as per Manufacturer's Recommendations
AS 4654.2:2012, 2.5.2
AS 4654.2:2012, 2.5.3
- Fall to drainage point preferredAS 4654.2:2012, 2.5.2
- Smooth & clean prior to waterproofingAS 4654.2:2012, 2.5.3
Membrane
Membrane AUDIT
NCC 2022 V1
All building classes
AS 4654.2 2012, 2.16
14 Sep 2012 to Current
Waterproof Membrane BEST PRACTICE
NCC 2022 V1
Membrane RULES
NCC 2022 V5
All Building Classes
NCC 2022 F1D5, H2D8, & HP10.2 [2019 F1.4, 3.8.1.2, 3.8.1.3]
May 2023
AS 4654.2:2012, 2.5.2
NCC 2022 Vol 1, F1D5
NCC 2022 Vol 2, H2D8
NCC 2022 HP, 10.2.1
AS 4654.2:2012, 2.3
AS 4654.2:2012, 2.5.3
AS 4654.2:2012, 2.7
AS 4654.2:2012, 2.6.2
- Building elements in Wet Areas to be Waterproof or Water Resistant to the NCCAS 4654.2:2012, 2.5.2NCC 2022 Vol 1, F1D5NCC 2022 Vol 2, H2D8
- FallsNCC 2022 HP, 10.2.1
- ≥ 1 : 100 fall in Membrane to Drainage Outlet
- Structural Substrate or Screed to form the required Falls
- Design & installation in accordance with AS 4654.1AS 4654.2:2012, 2.3
- Membrane movement Class I, II, or III
- To suit intended service conditions
- Substrate to be smooth, clean, dry & dust-freeAS 4654.2:2012, 2.5.3
- Fillets & Bond Breakers installed on all cornersAS 4654.2:2012, 2.7
- Lay & allow to cure as per Manufacturer's RecommendationsAS 4654.2:2012, 2.6.2
AS 4654.2:2012, 2.5.1
AS 4654.2:2012, 2.5.2
- ≥ 1 : 100AS 4654.2:2012, 2.5.1 fall to drainage
- ≥ 1 : 60 recommended
- System compatible & to suit applicationAS 4654.2:2012, 2.5.2
Floor Finish
Surface FINISHES
NCC 2022 V4
All Building Classes
NCC 2022 F1D5, H2D8, & HP10.2 [2019 F1.4, 3.8.1.2, 3.8.1.3]
May 2023
AS 4654.2:2012, 2.15.2
AS 4654.2:2012, 2.15.2
NCC 2022 Vol 1, F1D5
NCC 2022 Vol 2, H2D8
NCC 2022 HP, 10.2.1
AS 4654.2:2012, 2.15.1
AS 4654.2:2012, 2.15.3
- Building elements in Wet Areas to be Waterproof or Water Resistant to the NCCAS 4654.2:2012, 2.15.2AS 4654.2:2012, 2.15.2NCC 2022 Vol 1, F1D5
- Overlaying system not to harm & be suitable with the membraneNCC 2022 Vol 2, H2D8
- Membrane bonded to topping or beddingNCC 2022 HP, 10.2.1
- ≥ 10mm movement joint width at ≤ 4.5m CTS
- Structural toppingAS 4654.2:2012, 2.15.1
- ≥ 50mm thick with light mesh reinforcement
- Install double slip sheet on top of membrane
- Align movement joints in finishes over all building construction, control or movement jointsAS 4654.2:2012, 2.15.3
HB 198:2014, 5.1
AS 4654.2:2012, 2.5.2
- Fall to drainage
- ≥ 1 : 100HB 198:2014, 5.1
- ≥ 1 : 80 recommended
- ≥ P3 or R10 Slip RatingAS 4654.2:2012, 2.5.2
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