Wet Area (Benchmark) Building Codes & Rules
- Simplify wet area compliance with Tools™ Wet Area Overview—access NCC-aligned guidance, prevent mistakes, and achieve lifetime quality.
Vertical Waterstop
Corner flashing
Fall
NCC 2022 HP, 10.2.5 (1) (a)
Fall
NCC 2022 HP, 10.2.4 (3)
Bath 150mmNCC 2022 HP, 10.2.4 (3)
from wall
Fall
Bath Wall Junction
Framing Overview (Light Steel)
SCREENED
NCC 2022 HP, 10.2.2
≥ 150NCC 2022 HP, 10.2.2
Fall
AS 3740:2021, 4.9.2
≥ 150AS 3740:2021, 4.9.2
NCC 2022 HP, 10.2.2 (1) (b)
Screen ≥ 1.8mNCC 2022 HP, 10.2.2 (1) (b) high
Framing Overview (Timber)
NCC 2022 HP, 10.2.2 (1) (b)
NCC 2022 HP, 10.2.12
NCC 2022 Vol 1, F2D4
≥ 1:80 to 1:50NCC 2022 HP, 10.2.12NCC 2022 Vol 1, F2D4
NCC 2022 HP, 10.2.4 (3) (b)
NCC 2022 HP, 10.2.12
NCC 2022 Vol 1, F2D4
≥ 1:80 to 1:50NCC 2022 HP, 10.2.12NCC 2022 Vol 1, F2D4
NCC 2022 HP, 10.2.12
NCC 2022 Vol 1, F2D4
≥ 1:80 to 1:50NCC 2022 HP, 10.2.12NCC 2022 Vol 1, F2D4
NCC 2022 HP, 10.2.12 (a)
≥ 1:80NCC 2022 HP, 10.2.12 (a)
NCC 2022 HP, 10.2.12 (a)
≥ 1:80NCC 2022 HP, 10.2.12 (a)
Fall
Fall
Corner Angle Flashing
Door Waterstop
Waterproofing Verification
Falls Verification & Record
NCC 2022 V1
Moisture Content Verification & Record
NCC 2022 V1
Shower Setdown
Door Waterstop
Insert Floor Waste
Site Tools
Baths - Insert Type in Framing
Screed
Screened Water Stop
Film Thickness Test Points
Unenclosed Shower Waterstop
Film Thickness Test
Linear Drain
Floor Waste
Shower Penetrations & Niche
Flood Test
Wet Area Safety (Electrical)
Fire Resistant Construction
- Confirm structural thickness maintained
- Ensure setdowns & falls do not compromise FRL
Floor RULES (Type C Construction)
NCC 2022 V2
Class 2 to 9
NCC 2022 S5C24 [2019 Spec 1.1: 5]
May 2023
Class 2, 3, 9a (Health Care) & 9b
- FRL required to a floor between storeys, above a parking space, storage, or similar
- 30/30/30 FRL, or
- Combustible or metal floor protected from the underside with 13mm FR Plasterboard, 12mm Fibrecement or other equivalent fire-protective covering
- FRL not required to a floor within a SOU
Class 9c
- As above but not required between storeys
Floor RULES (Type A Construction)
NCC 2022 V2
Class 2 to 9
NCC 2022 S5C11 [2019 Spec C1.1: 3]
May 2023
- FRL not required to a floor if
- Directly on ground
- Within a SOU Class 2, 3 or 4
- Above a space below that is not a storey, garage, store or work area or used for any other ancillary purpose
Type B Construction Floor RULES
NCC 2022 V4
Class 2 to 9
NCC 2022 S5C21 [2019 Spec 1.1: 4]
May 2023
NCC 2022 Vol 1, S5C21 (1) (f)
NCC 2022 Vol 1, S5C21 (1) (f)
NCC 2022 Vol 1, S5C21 (1) (g)
NCC 2022 Vol 1, S5C21 (1) (f)
NCC 2022 Vol 1, S5C21 (1) (g)
- FRL required to
- Class 2 or 3 (other than within a Sole Occupancy Unit)NCC 2022 Vol 1, S5C21 (1) (f) &
- Class 9a Health Care & Class 9bNCC 2022 Vol 1, S5C21 (1) (f)
- Floors & Beams that are between storeys, above parking, storage or any other ancillary space,
- Class 9c Floor, Beams & Columns that are above parking, storage or any other ancillary spaceNCC 2022 Vol 1, S5C21 (1) (g)
- Protect withNCC 2022 Vol 1, S5C21 (1) (f)NCC 2022 Vol 1, S5C21 (1) (g)
- A ceiling ≥ 60 minutes Resistance to the Incipient Spread of Fire (RISF) , or
- 30/30/30 FRL, or
- If combustible or metal protected from the underside with fire-protective covering
- Confirm structural thickness maintained
- Ensure setdowns & falls do not compromise FRL
Shower Corner Angle
