Type 2 Unenclosed Shower Waterstop Building Codes & Rules
- UnenclosedT Shower Waterstop Tools™ simplifies the National Construction Code (NCC) with interactive graphics, including deemed to comply & best practices.
NCC 2022 Vol 1, F2D4 (2)
NCC 2022 HP, 10.2.12 (a)
1 : 80 to 1 : 50NCC 2022 Vol 1, F2D4 (2)NCC 2022 HP, 10.2.12 (a)
Sealer Membrane
Screed
Sealant
3
M
Shower floor
M
Sealant
Sealant
M
Sealant bead
M
Adhesive
M
Sealant
Sealant Bead
NCC 2022 Vol 1, F2D4 (2)
NCC 2022 HP, 10.2.12 (a)
1 : 80 to 1 : 50NCC 2022 Vol 1, F2D4 (2)NCC 2022 HP, 10.2.12 (a)
Floor System
Screed
Fall to FW
Fall to FW
Membrane
Bathroom floor
Adhesive
Sealer Membrane
Sealant /
Adhesive
M
Sealant
Screed
Screed RULES
NCC 2022 V1
All Building Classes
NCC 2022 F2D2 & S26C3
May 2023
AS 3958.1:2007, A.2.3 (a)
AS 3958.1:2007, A.2.3 (b)
AS 3958.1:2007, 3.3.1.1 (b) (i)
AS 3958.1:2007, 3.3.2.2 (b) (i)
NCC 2022 Vol 1, S26C3 (1)
NCC 2022 Vol 1, F2D2
- NCC 2022 F2D2 & S26C3 [2019 F1.7]
- Building elements in Wet Areas to be Waterproof or Water Resistant to NCC Specification 26 AS 3958.1:2007, A.2.3 (a)AS 3958.1:2007, A.2.3 (b)
- Bonded screeds
- 15 to 40mm thkAS 3958.1:2007, 3.3.1.1 (b) (i)
- Recommended for slab on ground, or
- Cured structural slabs ≤ 1/360 deflection of spanAS 3958.1:2007, 3.3.2.2 (b) (i)
- Unbonded screeds
- ≥ 40mm thk reinforced with slip sheetNCC 2022 Vol 1, S26C3 (1)
- Timber framed floors ≤ 1/360 deflection of spanNCC 2022 Vol 1, F2D2
AS 3958.1:2007, A.2.3 (a)
AS 3958.1:2007, A.2.3 (b)
- Bonded 15mm to 40mm thkAS 3958.1:2007, A.2.3 (a)
- Unbonded ≥ 40mm thkAS 3958.1:2007, A.2.3 (b)
Screened Shower
Concrete Screeds
Finishes
- Avoid stone & other absorbent materials
- Isolate joinery from wet surfaces
Preventing Water Damage
NCC 2022 V1
- Avoid stone & other absorbent materials
- Isolate joinery from wet surfaces
Screed
Screed RULES
NCC 2022 V1
All Building Classes
NCC 2022 F2D2 & S26C3
May 2023
AS 3958.1:2007, A.2.3 (a)
AS 3958.1:2007, A.2.3 (b)
AS 3958.1:2007, 3.3.1.1 (b) (i)
AS 3958.1:2007, 3.3.2.2 (b) (i)
NCC 2022 Vol 1, S26C3 (1)
NCC 2022 Vol 1, F2D2
- NCC 2022 F2D2 & S26C3 [2019 F1.7]
- Building elements in Wet Areas to be Waterproof or Water Resistant to NCC Specification 26 AS 3958.1:2007, A.2.3 (a)AS 3958.1:2007, A.2.3 (b)
- Bonded screeds
- 15 to 40mm thkAS 3958.1:2007, 3.3.1.1 (b) (i)
- Recommended for slab on ground, or
- Cured structural slabs ≤ 1/360 deflection of spanAS 3958.1:2007, 3.3.2.2 (b) (i)
- Unbonded screeds
- ≥ 40mm thk reinforced with slip sheetNCC 2022 Vol 1, S26C3 (1)
- Timber framed floors ≤ 1/360 deflection of spanNCC 2022 Vol 1, F2D2
AS 3958.1:2007, A.2.3 (a)
AS 3958.1:2007, A.2.3 (b)
- Bonded 15mm to 40mm thkAS 3958.1:2007, A.2.3 (a)
- Unbonded ≥ 40mm thkAS 3958.1:2007, A.2.3 (b)
Substrate
- Smooth, clean, dry & dust free surface[1]
- In-situ falls to drainage preferred
Substrate MATERIALS
NCC 2022 V3
All Building Classes
NCC 2022 F2D2, S26C3, & HP10.2.24 [2019 F1.7, 3.8.1]
May 2023
AS 3740:2021, 3.3.2 (a)
AS 3740:2021, 3.3.2 (b)
NCC 2022 HP, 10.2.1
NCC 2022 Vol 1, F2D2
NCC 2022 Vol 1, S26C3 (1)
- Building elements in Wet Areas to be Waterproof or Water Resistant to the NCCAS 3740:2021, 3.3.2 (a)AS 3740:2021, 3.3.2 (b)NCC 2022 HP, 10.2.1
- Water-resistant materialsNCC 2022 Vol 1, F2D2NCC 2022 Vol 1, S26C3 (1)
- Concrete
- Fibre cement
- Compatible with the waterproofing membrane system
- Materials shall not to deteriorate when exposed to moisture
Substrate PREPARATION
NCC 2022 V4
All Building Classes
NCC 2022 F2D2, S26C3, & HP10.2.9 [2019 F1.7]
May 2023
AS 3740:2021, 4.4.1
- Building elements in Wet Areas to be Waterproof or Water Resistant to the NCC
- All surfaces to be prepared for Waterproofing System adhesionAS 3740:2021, 4.4.1
- 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
Substrate PREPARATION
NCC 2022 V1
AS 3740:2021, 4.4.1
- Smooth, clean, dry & dust free surfaceAS 3740:2021, 4.4.1
- In-situ falls to drainage preferred
Waterstop Angle
Floor Tiles
- P3 or R10 Slip Rating[1]
- Falls to FW & transverse cuts to minimise ponding
Slip RATING
NCC 2022 V1
All Building Classes
NCC 2022 D1P2
May 2023
Tile TOLERANCE
NCC 2022 V3
All Building Classes
NCC 2022 F2D2, S26C3 [2019 F1.7]
NCC 2022 HP10.2.12
May 2023
NCC 2022 Vol 1, F2D4 (2)
AS 3740:2021, 2.3.1
AS 3740:2021, 2.3.5
NSW 2017 Guide to Standards & Tolerances, 12.6
AS 3958.1:2007, 5.4.6 (c)
AS 3958.1:2007, 5.4.6 (a)
NCC 2022 HP, 10.2.12
NCC 2022 Vol 1, S26C1 (a)
NCC 2022 HP, 10.2.1
- Building elements in Wet Areas to be Waterproof or Water Resistant to NCC Specification 26, Part 10.2NCC 2022 Vol 1, F2D4 (2)AS 3740:2021, 2.3.1
- Falls to Substrate
- ≥ 1 : 100 typicallyAS 3740:2021, 2.3.5
- ≥ 1 : 80 if whole room is an Unenclosed ShowerNSW 2017 Guide to Standards & Tolerances, 12.6
- Falls to Floor Finish
- ≥ 1 : 80 to 1 : 50AS 3958.1:2007, 5.4.6 (c)AS 3958.1:2007, 5.4.6 (a)
- Ponding
- < 1.5mm deep surface tension after 15 minutes
- Installation tolerance
- Standards & Tolerance Guides (Various States)NCC 2022 HP, 10.2.12
- Grout JointsNCC 2022 Vol 1, S26C1 (a)
- 3 to 6mm floor grout joints
- 1 to 2mm wall grout joints
- Lippage for Joints & FlatnessNCC 2022 HP, 10.2.1
- ≤ 1mm lippage for joints ≤ 3mm
- ≤ 2mm lippage for joints ≥ 3mm
- ± 4mm in 2m flatness tolerance
HB 198:2014, 5.1
- P3 or R10 Slip RatingHB 198:2014, 5.1
- Falls to FW & transverse cuts to minimise ponding
Waterstop Angle
Waterstop Angle RULES
NCC 2022 V2
All Building Classes
NCC 2022 F2D2, S26C3, & 10.2.18 [2019 F1.7]
May 2023
NCC 2022 HP, 10.2.17
NCC 2022 Vol 1, S26C1 (a)
AS 3740:2021, 4.8.2 (b)
AS 3740:2021, 4.6.1
AS 3740:2021, 4.8.1
AS 3740:2021, 4.8.2
- Building elements in Wet Areas to be Waterproof or Water Resistant to NCC Specification 26, Part 10.2.17NCC 2022 HP, 10.2.17NCC 2022 Vol 1, S26C1 (a)
- ≥ 1.5mAS 3740:2021, 4.8.2 (b) from
- Shower Outlet if Wall mounted
- Shower Rose if Ceiling mounted
- Adhered and/or mechanically fixed to SubstrateAS 3740:2021, 4.6.1AS 3740:2021, 4.8.1
- Waterproofed Waterstop beAS 3740:2021, 4.8.2
- Vertical leg aligned with floor finish & sealed
- Junctions & intersection with walls waterproofed
- Floor within shower fully waterproofed
- Membrane required within Shower Side
Water Stop INSTALLATION
NCC 2022 V1
AS 3740:2021, 4.8.2 (b)
AS 3740:2021, 4.8.2
AS 3740:2021, 4.8.2
- ≥ 1.5mAS 3740:2021, 4.8.2 (b) from Shower outlet
- Finish flush with FloorAS 3740:2021, 4.8.2
- Intersection with wall fully waterproofedAS 3740:2021, 4.8.2
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