Both the NCC 2022 and AS3740-2021 define enclosed showers as being designed to contain the spread of water.
A frameless shower screen therefore must be fitted with seals and deflectors for the shower to be deemed enclosed as they control the spread of water within the shower area.
Where seals and deflectors are not fitted it is deemed as an unenclosed shower, which means the surrounding bathroom area must be waterproofed to either NCC 2022 Part 10.2 or AS3740-2021. i.e. a waterstop must be provide at least 1500mm from the shower rose, with the floor waterproofed and falling to a floor waste at between 1:50 and 1:80.
A partly or semi-frameless screen may be deemed to be an enclosed shower without a seal where the panels overlap one another.
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