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.

Bathroom Floor

NCC 2022 Vol 1, F2D4 (2)

NCC 2022 HP, 10.2.12 (a)

1 : 80 to 1 : 50^{NCC 2022 Vol 1, F2D4 (2)NCC 2022 HP, 10.2.12 (a)}

NCC 2022 HP, 10.2.21

AS 3740:2021, 4.2

Sealer Membrane^{NCC 2022 HP, 10.2.21AS 3740:2021, 4.2}

Screed

AS 3740:2021, 4.11.1

Sealant^{AS 3740:2021, 4.11.1}

Shower Floor

Sealant

Sealant bead

Adhesive

Sealant

NCC 2022 Vol 1, F2D4 (2)

NCC 2022 HP, 10.2.12 (a)

1 : 80 to 1 : 50^{NCC 2022 Vol 1, F2D4 (2)NCC 2022 HP, 10.2.12 (a)}

Floor System

Screed

Fall to FW

NCC 2022 HP, 10.2.21

AS 3740:2021, 4.2

Membrane^{NCC 2022 HP, 10.2.21AS 3740:2021, 4.2}

Adhesive

NCC 2022 HP, 10.2.21

AS 3740:2021, 4.2

Sealer Membrane^{NCC 2022 HP, 10.2.21AS 3740:2021, 4.2}

Waterstop Angle

Industry Recommendation

3^{Industry Recommendation}

Concrete Screeds

Floor Tiles

P3 or R10 Slip Rating^[1]
Falls to FW & transverse cuts to minimise ponding

Tile TOLERANCE

NCC 2022 V6

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 10.2^{NCC 2022 Vol 1, F2D4 (2)AS 3740:2021, 2.3.1}
Falls to Substrate
≥ 1 : 100 typically^{AS 3740:2021, 2.3.5}
≥ 1 : 80 if whole room is an Unenclosed Shower^{NSW 2017 Guide to Standards & Tolerances, 12.6}
Falls to Floor Finish
≥ 1 : 80 to 1 : 50^{AS 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 Joints^{NCC 2022 Vol 1, S26C1 (a)}
3 to 6mm floor grout joints
1 to 2mm wall grout joints
Lippage for Joints & Flatness^{NCC 2022 HP, 10.2.1}
≤ 1mm lippage for joints ≤ 3mm
≤ 2mm lippage for joints ≥ 3mm
± 4mm in 2m flatness tolerance

Slip RATING

NCC 2022 V2

All Building Classes

NCC 2022 D1P2

May 2023

NCC 2022 Vol 1, D1P2

NCC 2022 Vol 1, D3D15

HB 198:2014, 4.3.2 (Table 3A)

HB 198:2014, 5.2 (Table 3B)

Slip resistance performance requirements according to NCC^{NCC 2022 Vol 1, D1P2NCC 2022 Vol 1, D3D15HB 198:2014, 4.3.2 (Table 3A)HB 198:2014, 5.2 (Table 3B)}

HB 198:2014, 5.1

P3 or R10 Slip Rating^{HB 198:2014, 5.1}
Falls to FW & transverse cuts to minimise ponding

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

AS 3740:2021, 4.11.1

Sealant /

Adhesive^{AS 3740:2021, 4.11.1}

Internal Waterproofing Overview

Screened Shower

AS 3740:2021, 4.11.1

Sealant^{AS 3740:2021, 4.11.1}

AS 3740:2021, 4.11.1

Sealant Bead^{AS 3740:2021, 4.11.1}

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 NCC^{AS 3740:2021, 3.3.2 (a)AS 3740:2021, 3.3.2 (b)NCC 2022 HP, 10.2.1}
Water-resistant materials^{NCC 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 adhesion^{AS 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 surface^{AS 3740:2021, 4.4.1}
In-situ falls to drainage preferred

Waterstop Angle

≥ 1.5m^[1] from Shower outlet
Finish flush with Floor^[2]
Intersection with wall fully waterproofed^[3]

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 10.2.17^{NCC 2022 HP, 10.2.17NCC 2022 Vol 1, S26C1 (a)}
≥ 1.5m^{AS 3740:2021, 4.8.2 (b)} from
Shower Outlet if Wall mounted
Shower Rose if Ceiling mounted
Adhered and/or mechanically fixed to Substrate^{AS 3740:2021, 4.6.1AS 3740:2021, 4.8.1}
Waterproofed Waterstop be^{AS 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

≥ 1.5m^{AS 3740:2021, 4.8.2 (b)} from Shower outlet
Finish flush with Floor^{AS 3740:2021, 4.8.2}
Intersection with wall fully waterproofed^{AS 3740:2021, 4.8.2}

Screed

Bonded 15mm to 40mm thk^[1]
Unbonded ≥ 40mm thk^[2]

Screed RULES

NCC 2022 V2

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 thk^{AS 3958.1:2007, 3.3.1.1 (b) (i)}
Recommended for slab on ground, or
Cured structural slabs ≤ 1/360 deflection of span^{AS 3958.1:2007, 3.3.2.2 (b) (i)}
Unbonded screeds
≥ 40mm thk reinforced with slip sheet^{NCC 2022 Vol 1, S26C3 (1)}
Timber framed floors ≤ 1/360 deflection of span^{NCC 2022 Vol 1, F2D2}

AS 3958.1:2007, A.2.3 (a)

AS 3958.1:2007, A.2.3 (b)

Bonded 15mm to 40mm thk^{AS 3958.1:2007, A.2.3 (a)}
Unbonded ≥ 40mm thk^{AS 3958.1:2007, A.2.3 (b)}

Screed

Bonded 15mm to 40mm thk^[1]
Unbonded ≥ 40mm thk^[2]

Screed RULES

NCC 2022 V2

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 thk^{AS 3958.1:2007, 3.3.1.1 (b) (i)}
Recommended for slab on ground, or
Cured structural slabs ≤ 1/360 deflection of span^{AS 3958.1:2007, 3.3.2.2 (b) (i)}
Unbonded screeds
≥ 40mm thk reinforced with slip sheet^{NCC 2022 Vol 1, S26C3 (1)}
Timber framed floors ≤ 1/360 deflection of span^{NCC 2022 Vol 1, F2D2}

AS 3958.1:2007, A.2.3 (a)

AS 3958.1:2007, A.2.3 (b)

Bonded 15mm to 40mm thk^{AS 3958.1:2007, A.2.3 (a)}
Unbonded ≥ 40mm thk^{AS 3958.1:2007, A.2.3 (b)}

Membrane Above Screed