2022 NCC Seminars: Volume Two - Health and Amenity

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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).