Floor Waste Building Codes & Rules
- Floor Waste Tools™ simplifies the National Construction Code (NCC) with interactive graphics, including deemed to comply & best practices.
Screed
Leak control
flange
Grout
M
Floor Tile
M
Fall
M
AS 3958.1:2007, 5.4.3
Cut EdgesAS 3958.1:2007, 5.4.3
- Arris edge to remove hazards
Large Tiles
- Transverse cut larger format tiles to create falls to drain
Screed
Membrane
Adhesive
M
Sealant
bead
M
Grate
NCC 2022 Vol 1, F2D4 (2)
NCC 2022 HP, 10.2.12
1 : 80 to 1 : 50NCC 2022 Vol 1, F2D4 (2)NCC 2022 HP, 10.2.12
M
Sealant
bead
HB 198:2014, 5.1
P3 or R10HB 198:2014, 5.1
Floor
Waste
M
M
Sealer membrane (Stone finish only)
Substrate
Top of Floor
Anti-fungal Sealant
Top of Floor
Slip Resistance
M
AS 3958.1:2007, 5.7.1 (e)
Floor Tile
NCC 2022 Vol 1, F2D4 (2)
NCC 2022 HP, 10.2.12
1 : 80 to 1 : 50NCC 2022 Vol 1, F2D4 (2)NCC 2022 HP, 10.2.12
Fall
NCC 2022 Vol 1, F2D4 (1)
AS 3740:2021, 2.3
NCC 2022 Vol 1, F2D3
NCC 2022 HP, 10.2.14 (a)
Industry Recommendation
NCC 2022 Vol 1, F2D4 SA (2)
Floor Waste Location Rules
- Class 1 - In Shower areas (both enclosed & unenclosed)NCC 2022 Vol 1, F2D4 (1)
- Not required but recommended in all Bathrooms, Powder Rooms, & LaundriesAS 3740:2021, 2.3
- Class 2, 3, or 4 - In a Bathroom or Laundry above another SOU or public spaceNCC 2022 Vol 1, F2D3
- Class 5 to 9 - In any Category 1 or 2 Wet AreaNCC 2022 HP, 10.2.14 (a)
- Shower areas (both enclosed & unenclosed)
- Shower Bath (unenclosed)
- Anywhere within reach of a hand-held Shower or Spray
- Bathroom area outside an unenclosed Shower or Shower Bath
- A room containing a UrinalIndustry Recommendation
- Requirements for Plant Rooms & other areas should be confirmed by specialist consultant
SA VariationNCC 2022 Vol 1, F2D4 SA (2)
- Class 5 to 9 - Not required if all Vessels within the space have
- In-built overflow protection
- Permanent open trap (eg. WC)
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 typicallyNCC 2022 Vol 1, F2D4 (2)
- ≥ 1 : 80 if whole room is an Unenclosed ShowerAS 3740:2021, 2.3.1
- Falls to Floor Finish
- ≥ 1 : 80 to 1 : 50AS 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 JointsAS 3958.1:2007, 5.4.6 (a)
- 3 to 6mm floor grout joints
- 1 to 2mm wall grout joints
- Lippage for Joints & FlatnessNCC 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 RatingHB 198:2014, 5.1
- Movement JointsAS 3958.1:2007, 5.4.5.2
- ≤ 4.5m CTS
- Align with Structural movement or Control Joints
- Above load bearing Beams or Walls
Floor Waste Gully (FWG)
Membrane
- Turn the Membrane down into the Leak Control Flange[1]
- Compatible to suit Substrate & bedding / finishes[2]
- Test & protect from damage[3]
Membrane AUDIT
NCC 2022 V2
All Building Classes
NCC 2022 F2D2, S26C3, 10.2.26 [2019 F1.7]
May 2023
AS 3740:2021, 4.5.4 (a)
AS 3740:2021, 4.5.4 (b)
AS 3740:2021, 4.5.4 (c)
AS 3740:2021, 4.5.2
- Building elements in Wet Areas to be Waterproof or Water Resistant to NCC Specification 26, Part 10.2, & AS 3740
- Curing & protectionAS 3740:2021, 4.5.4 (a)
- Fully cured to manufacturers' recommendations
- Protect from physical & chemical damage until covered by finishes
- Flood testingAS 3740:2021, 4.5.4 (b)
- If any leaks occur, these shall be repaired following the system design & retested
- Electronic leak detectionAS 3740:2021, 4.5.4 (c)
- If any discontinuities occur, these shall be repaired & retested only on the repaired areas
- Seam probe testingAS 3740:2021, 4.5.2
- If any seam failures occur, these shall be repaired & retested
Membrane Curing & Inspection RULES
NCC 2022 V2
All Building Classes
NCC 2022 F2D2, S26C3, 10.2.28 [2019 F1.7]
May 2023
AS 3740:2021, 4.5.2
AS 3740:2021, 4.5.3
- Building elements in Wet Areas to be Waterproof or Water Resistant to NCC Specification 26, Part 10.2, & AS 3740
- Fully cure prior to any testingAS 3740:2021, 4.5.2
- Visual inspection conducted prior to application of overlay finishesAS 3740:2021, 4.5.3
AS 3740:2021, 4.3.1 (a)
AS 3740:2021, 3.2
AS 3740:2021, 4.17 (b)
- Turn the Membrane down into the Leak Control FlangeAS 3740:2021, 4.3.1 (a)
- Compatible to suit Substrate & bedding / finishesAS 3740:2021, 3.2
- Test & protect from damageAS 3740:2021, 4.17 (b)
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 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, 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 WasteAS 3740:2021, 2.3
- ≥ 1 : 80 fall required to entire room where Shower unscreenedAS 3740:2021, 4.4.1
- Form falls in Structural Floor or ScreedAS 3740:2021, 2.3.1
- Smooth, clean, dry & dust free surfaceAS 3740:2021, 2.3.5
Floor Waste
- Height set below tile
- Top of grout to finish flush to prevent water retention in between tiles
- Strip drains similar
Floor Waste BEST PRACTICE
NCC 2022 V1
- Height set below tile
- Top of grout to finish flush to prevent water retention in between tiles
- Strip drains similar
Redirecting... (5)