Shower Penetrations & Niche Building Codes & Rules
- Penetrations & Niche Tools™ simplifies the National Construction Code (NCC) with interactive graphics, including deemed to comply & best practices.
Fillet
Continuous membrane
over flange
Flange
Change the text
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Adhesive
Fall
Adhesive
Pre-formed shower niche
NCC 2022 Vol 1, F2D4 (2)
NCC 2022 HP, 10.2.12 (a)
1 : 80 to 1 : 50NCC 2022 Vol 1, F2D4 (2)NCC 2022 HP, 10.2.12 (a)
Membrane
Adhesive
Corner
Bead
M
M
Fall
Matching sealant joint to all internal corners
Wall
Tiles
Sealant
Niche
Niche INSTALLATION
NCC 2022 V2
All Building Classes
NCC 2022, F2D2, S26C3 [2019 F1.7]
NCC 2022 HP, 10.2 [2019 3.8.1]
May 2023
NCC 2022 HP, 10.2.1
NCC 2022 Vol 1, S26C1 (a)
AS 3740:2021, 3.3.2 (a)
AS 3740:2021, 4.12.4 (a)
- Building elements in Wet Areas to be Waterproof or Water Resistant to NCC Specification 26, NCC Part 10.2NCC 2022 HP, 10.2.1NCC 2022 Vol 1, S26C1 (a)
- Niche formed from a water-resistant substrateAS 3740:2021, 3.3.2 (a)AS 3740:2021, 4.12.4 (a)
- Concrete
- Cement render
- Fibre-cement
- Masonry
- Other proprietary & water-proof system
- Suitable supported by wall framing
- Avoid mechanical fixings
- Do not install corner angles or trims that will hold water within the niche
NCC 2022 Vol 1, F2D4 (2)
NCC 2022 HP, 10.2.12 (a)
- 1 : 80 to 1 : 50NCC 2022 Vol 1, F2D4 (2)NCC 2022 HP, 10.2.12 (a) fall to base for drainage
- Corner bead or angle must not impede drainage
Soap Holder
- Fix epoxy adhesive to wall tile
- Avoid screw fixings through membrane
Soap Holder INSTALLATION
NCC 2022 V1
- Fix epoxy adhesive to wall tile
- Avoid screw fixings through membrane
Plumbing Penetrations
- Seal between plumbing outlet & wall membrane[1]
Installation BEST PRACTICE
NCC 2022 V1
Plumbing PENETRATIONS
NCC 2022 V2
All Building Classes
NCC 2022 F2D2, S26C3 [2019 F1.7]
NCC 2022 H4D2, 10.2.23 [2019 3.8.1]
May 2023
NCC 2022 HP, 10.2.23 (b)
NCC 2022 HP, 10.2.23 (a)
- 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 membraneNCC 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 disksNCC 2022 HP, 10.2.23 (a)
NCC 2022 HP, 10.2.23 (a)
- Seal between plumbing outlet & wall membraneNCC 2022 HP, 10.2.23 (a)
Membrane
- Fully waterproof niche[1]
- Rounded junctions to substrate
Niche WATERPROOFING
NCC 2022 V2
All Building Classes
NCC 2022, F2D2, S26C3 [2019 F1.7]
NCC 2022 HP, 10.2 [2019 3.8.1]
May 2023
NCC 2022 HP, 10.2.2 (1) (c)
NCC 2022 Vol 1, S26C1 (a)
NCC 2022 HP, 10.2.1
AS 3740:2021, 4.5
- Building elements in Wet Areas to be Waterproof or Water Resistant to NCC Specification 26, NCC Part 10.2NCC 2022 HP, 10.2.2 (1) (c)NCC 2022 Vol 1, S26C1 (a)
- Membrane applied to all surfacesNCC 2022 HP, 10.2.1
- Radius corners for smooth transitions to external junctions
- ≥ 40mmAS 3740:2021, 4.5 fillets or bond breakers to all internal corners
- Avoid screw fixing niche to frame, adhesive fixing preferred
- Flush drive any fixings & sealant, wipe over heads prior to membrane application
AS 3740:2021, 4.12.4 (c)
- Fully waterproof nicheAS 3740:2021, 4.12.4 (c)
- Rounded junctions to substrate
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M
Membrane
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Internal Waterproofing Overview
Shower Grabrails
- Mechanically fixed to studs or fixing grounds
- Silicone seal all fixing holes
Grab Rail INSTALLATION
NCC 2022 V1
- Mechanically fixed to studs or fixing grounds
- Silicone seal all fixing holes
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