This video from the 2022 NCC Seminars discusses Part H4 Health and Amenity from NCC 2022 Volume Two.
Transcript
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[Music]
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My name is Phil Finnimore from the Australian Building Codes Board and today I'm going to talk about some provisions
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in Part H4 of Volume Two relating to health and humanity and in particular wet areas.
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There have been some changes but before we get into what the changes are there's a need
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to talk about some history. History of the NCC going back to BCA 96 right up to BCA 2011, where
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we had in Volume Two Deemed-to-Satisfy provisions that provided technical solution to wet areas,
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that's showers and baths and bathrooms and toilet areas, and also the ability to use AS 3740 as a
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Deemed-to-Satisfy solution as well. So we had up to 2011 a method of providing a Deemed-to-Satisfy
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solution through reference to AS 3740 or the solution within the Volume Two DtS provisions.
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That changed in 2012, where we maintained a requirement in the code through the tables in
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Part 3.8.1 to say where particular areas needed to be waterproof and where particular areas need to
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be made water resistant. Which then took you to the technical solution of 3740, so from 2012 to 2019
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the NCC told you and tells you how and where to provide waterproofing and water resistance and the
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technical solution was 3740. What we've done for NCC 2022 through the Housing Provisions have gone
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back to what was in 2011 and reinserted the Deemed-to-Satisfy provisions in detail into Volume Two.
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H4D2 and H4D3 are the relevant Deemed-to-Satisfy provisions in Volume Two for wet areas,
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the construction outcomes, mainly whether something is waterproof or not, are contained in the
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Housing Provisions Standard, that's Housing Provisions 2022. The construction details, that is the how
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it is done, is where the option exists you can use AS 3740 or you can use the new details in
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the Housing Provisions Standard. Noting that if you're using the Housing Provisions or 3740 you
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must comply with clauses 10.2.1 to 10.2.6 and also clause 10.2.12 relating to floor wastes.
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The layout for the Housing Provisions 2022 we've regrouped into particular sections
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those things that relate to waterproofing systems, materials, water resistant surfaces
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under systems and materials that's 10.2.6 to 10.2.10. Construction of wet areas that is those
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things relating to wall and floor substrates, falls, floor surface materials as in a separate section.
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Showers and baths have their own sections their clauses 10.2.14 to 19 and 10.2.20 for baths and spas.
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The remainder of the provisions that relate to membrane installations, substrate
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surfaces, bond breakers, all of the details about the makeup of waterproofing and water
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resistant systems are contained within ancillary provisions under 10.2.21 and down to 10.2.32.
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Something new for NCC 2022 and the Housing Provisions
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if you have a handheld bidet spray installation in a WC area, note that there are provisions
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there for floors and walls and floor junctions to be waterproof and or water
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resistant to a particular dimension set out there in 10.2.5(3)(b) (i) and (ii).