Baths - Fitting Details Building Codes & Rules

- Baths and Spas Tools™ simplifies the National Construction Code (NCC) with interactive graphics, including deemed to comply & best practices.

All Building Classes

NCC 2022 F2D2, & Part 10.2.20 [2019 F1.7]

May 2023

Building elements in Wet Areas to be Waterproof or Water Resistant to NCC Part 10.2, & AS 3740
Bath & Spas waterproofed junctions^{NCC 2022 HP, 10.2.20}
Recessed in Wall
Sufficiently recess into wall to allow water to pass from the membraned wall lining, into the bath
≥ 6mm Type 1 Sealant^{AS 3740:2021, 4.13.2.2}
Battened Junction
Battens to support the wall lining, allowing the bath rim to fit behind
Where notching of studs is not possible or bath adjacent to masonry or steel studwork
Shelf or Insert Bath
Waterstop ≥ 5mm above tile finished level
Do not allow bath to press down on Waterstop

Membrane

Wall lining

Bath & Spa

Wall Finish

Adhesive

Stud Framing

Anti-fungal Sealant

≥ 6

Type 1 Sealant

All Building Classes

NCC 2022 F2D2, S26C3 [2019 F1.7]

NCC 2022 H4D2, 10.2.23 [2019 3.8.1]

May 2023

Building elements in Wet Areas to be Waterproof or Water Resistant to NCC Specification 26, NCC Part 10.2, & AS 3740
Sealing
Fully waterproof gap between plumbing outlet & wall membrane^{NCC 2022 HP, 10.2.23 (b)}
Proprietary flange adhered to wall
Sealant to wall & tap body junction
Seal must not impede servicing tap washers or ceramic disks^{NCC 2022 HP, 10.2.23 (a)}

Seal between plumbing outlet & wall membrane^{AS 3740:2021, 4.12.2AS 3740:2021, 4.11.1 (b)}