Linear Shower Drain Building Codes & Rules

- Linear Shower Drain Tools™ simplifies the National Construction Code (NCC) with interactive graphics, including deemed to comply & best practices.

Fall

Foam Expansion Joint

Specify outlet location

Adhesive

Timber Stud

Adhesive

Membrane

Screed

Wall Lining

Fall Substrate Below

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)}

Sealant

Floor Tiles

Slip Resistance

Sealant

Bead

Fall

Leak Control

Flange

Linear Shower Drain

Height set below tile
Removable Grate

Strip Drain PLACEMENT

NCC 2022 V1

Fabricated 316 Stainless Steel continuous grate & housing
Drainage Outlet incorporated in fabrication process
Loose fitted Grate

Height set below tile
Removable Grate

HB 198:2014, 5.1

P3 or R10^{HB 198:2014, 5.1}

Removable Grate

Non-shrink grout

Fillet

Fall

Wall Tiles

Substrate

AS 3740:2021, 2.3.1

AS 3740:2021, 2.3.5

1 : 100 ^{AS 3740:2021, 2.3.1}/ 1 : 80^{AS 3740:2021, 2.3.5}

Recess into substrate

Membrane

Linear Shower Drain

Height set below tile
Removable Grate

Strip Drain PLACEMENT

NCC 2022 V1

Height set below tile
Removable Grate

Outlet

Ø 80 ID for maintenance

Outlet

NCC 2022 V1

Provide adequate outlet ID for maintenance
Ø 80mm ID typically
Ø 100mm ID (ACT)
Required clearance for access to trap below

Ø 80 ID for maintenance

Membrane Substrate

≥ 1 : 100 fall required towards the Floor Waste^[1]
≥ 1 : 80 fall required to entire room where Shower unscreened^[2]
Form falls in Structural Floor or Screed^[3]
Smooth, clean, dry & dust free surface^[4]

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, 2.3

AS 3740:2021, 4.4.1

AS 3740:2021, 2.3.1

AS 3740:2021, 2.3.5

≥ 1 : 100 fall required towards the Floor Waste^{AS 3740:2021, 2.3}
≥ 1 : 80 fall required to entire room where Shower unscreened^{AS 3740:2021, 4.4.1}
Form falls in Structural Floor or Screed^{AS 3740:2021, 2.3.1}
Smooth, clean, dry & dust free surface^{AS 3740:2021, 2.3.5}

Floor Tiles

Tile selection
P3 or R10 Slip Rating^[1]
Movement Joints^[2]
≤ 4.5m CTS
Align with Structural movement or Control Joints
Above load bearing Beams or Walls

Slip RATING

NCC 2022 V2

All Building Classes

NCC 2022 D1P2

May 2023

Tile TOLERANCE

NCC 2022 V2

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

Building elements in Wet Areas to be Waterproof or Water Resistant to NCC Specification 26, Part 10.2, & AS 3740
Falls to Substrate
≥ 1 : 100 typically^{NCC 2022 Vol 1, F2D4 (2)}
≥ 1 : 80 if whole room is an Unenclosed Shower^{AS 3740:2021, 2.3.1}
Falls to Floor Finish
≥ 1 : 80 to 1 : 50^{AS 3740:2021, 2.3.5NSW 2017 Guide to Standards & Tolerances, 12.6}
Ponding
< 1.5mm deep surface tension after 15 minutes
Installation tolerance
Standards & Tolerance Guides (Various States)^{AS 3958.1:2007, 5.4.6 (c)}
Grout Joints^{AS 3958.1:2007, 5.4.6 (a)}
3 to 6mm floor grout joints
1 to 2mm wall grout joints
Lippage for Joints & Flatness^{NCC 2022 HP, 10.2.12}
≤ 1mm lippage for joints ≤ 3mm
≤ 2mm lippage for joints ≥ 3mm
± 4mm in 2m flatness tolerance

HB 198:2014, 5.1

AS 3958.1:2007, 5.4.5.2

Tile selection
P3 or R10 Slip Rating^{HB 198:2014, 5.1}
Movement Joints^{AS 3958.1:2007, 5.4.5.2}
≤ 4.5m CTS
Align with Structural movement or Control Joints
Above load bearing Beams or Walls

Substrate

Form falls in Structural Floor or Screed^[1]
Smooth, clean, dry & dust free surface^[2]

Substrate FALLS

NCC 2022 V3

All Building Classes

NCC 2022 F2D2, S26C3, 10.2.9, & 10.2.12 [2019 F1.7]

May 2023

AS 3740:2021, 2.3.1

AS 3740:2021, 2.3.5

Building elements in Wet Areas to be Waterproof or Water Resistant to NCC Specification 26, Part 10.2, & AS 3740
≥ 1 : 100 fall required approaching Floor Waste^{AS 3740:2021, 2.3.1}
≥ 1 : 80 fall required to entire room where Shower unscreened^{AS 3740:2021, 2.3.5}

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

AS 3740:2021, 2.3

Form falls in Structural Floor or Screed^{AS 3740:2021, 4.4.1}
Smooth, clean, dry & dust free surface^{AS 3740:2021, 2.3}

Wall linings

6mm fibre cement for typical tile or paint finish
8mm gap to structural floor

Wall Lining

NCC 2019 V1

Refer to Manufacturer's recommendations for Fixing type & spacing
6mm Fibre-cement
Preferred for typical installations
≤ 13mm thk Vitrified or Ceramic tiles
9 to 12mm Fibre-cement
Where thicker stone tiles are to be used
WR Plasterboard NOT Allowed
8mm Movement gap to slab
WATERPROOFER to seal gap with Polyurethane Sealant

6mm fibre cement for typical tile or paint finish
8mm gap to structural floor

Outlet

Ø 80 ID for maintenance

Maintenance ACCESS

NCC 2022 V1

Ø 80 ID for maintenance

Outlet

Ø 80 ID for maintenance

Outlet

NCC 2022 V1

Provide adequate outlet ID for maintenance
Ø 80mm ID typically
Ø 100mm ID (ACT)
Required clearance for access to trap below

Ø 80 ID for maintenance

Linear Shower Drain

Height set below tile
Top of grout flush to finish to prevent water retention in between tiles
Locate at shower door or opposite wall
Parallel to shower door to improve falls in floor

Strip Drain PLACEMENT

NCC 2022 V1

Height set below tile
Top of grout flush to finish to prevent water retention in between tiles
Locate at shower door or opposite wall
Parallel to shower door to improve falls in floor

NCC 2022 HP, 10.2.12

NCC 2022 Vol 1, F2D4 (2) (a)

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

Wall linings

6mm fibre cement for typical tile or paint finish
8mm gap to structural floor

Wall Lining

NCC 2022 V3

Refer to Manufacturer's recommendations for Fixing type & spacing
6mm Fibre-cement
Preferred for typical installations
≤ 13mm thk Vitrified or Ceramic tiles
9 to 12mm Fibre-cement
Where thicker stone tiles are to be used
WR Plasterboard NOT Allowed
8mm Movement gap to slab
WATERPROOFER to seal gap with Polyurethane Sealant

6mm fibre cement for typical tile or paint finish
8mm gap to structural floor

Wall linings

6mm fibre cement for typical tile or paint finish
8mm gap to structural floor

Wall Lining SELECTION

NCC 2022 V4

6mm fibre cement for typical tile or paint finish
8mm gap to structural floor

Concrete Screeds