Bathroom floor waste

[garfield]

Hi,

Looking for advice on laying 300 X 600 tiles on a bathroom floor outside the shower area.

As they are quite large I think it will be hard to get good fall towards the drain using such large tiles. As it is outside the shower area I'd much prefer not to have to do relief cuts in the tiles, but I've had a few people suggest that being on the floor outside of the shower that not very much fall is needed, and just wondering if anyone can vouch for this please? I would obviously do some fall but if it didn't need to be too steep I could gently slope the tiles towards the grate and be able to use the tiles I desire.

Any advice much appreciated.
Thanks
Geoff

[JimB1]

I believe a gentle slope will be sufficient but diagonal cuts will still be needed around the drain.


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[droog]

Some reading here:
To grade, or not to grade | ABCB (https://www.abcb.gov.au/news/2017/grade-or-not-grade)

As water flows downhill as long as any installed floor waste is lower than a waterstop installed at the door it will protect from overflow even without grading right up to the waste.

Personally our two bathrooms with walk in showers have no separate floor waste outside the shower and no grading of the floor. These are ground floor in private residence and no requirement exists in current regulations for a separate floor waste in Vic.
If flooding or overflow occurs the shower floor waste is the lowest point in the room, argument can be made that the waste may get blocked, my view is a second waste could get blocked and or is connected to the same waste if the blockage is in the pipe.

[Beardy]

The building code stipulates the minimum fall requirements but many people don’t follow them for reasons you have outlined but it is still a technical non compliance and as a builder refuse to do it.
The best way to deal with large format tiles is to use a trench grate on one wall and then you are only creating fall in one plane to prevent tile lipping.

[droog]

The building code stipulates the minimum fall requirements but many people don’t follow them for reasons you have outlined but it is still a technical non compliance and as a builder refuse to do it.


Interesting, for reference can you point us to the building code that stipulates this requirement?

[Beardy]

Interesting, for reference can you point us to the building code that stipulates this requirement?

This should help you
Floor wastes in bathrooms when are they required (https://hia.com.au/resources-and-advice/building-it-right/kitchens-and-bathrooms/articles/floor-wastes-in-bathrooms-when-are-they-required)

[droog]

This should help you
Floor wastes in bathrooms when are they required (https://hia.com.au/resources-and-advice/building-it-right/kitchens-and-bathrooms/articles/floor-wastes-in-bathrooms-when-are-they-required)


Thanks for that, just confirms exactly what I stated in my post and that the building code does not stipulates the minimum fall requirements with regard to the OP question.
From your link:

For the area outside of the shower an additional floor waste is not ‘required’ to be provided, nor is one ‘required’ to be provided in other wet areas such as in a laundry or in a WC.
and

AS 3740 requires that a floor be graded to the floor waste and meet other compliance requirements where a floor waste is ‘required’. The required fall of the floor is prescribed in AS 3740.

[Beardy]

Thanks for that, just confirms exactly what I stated in my post and that the building code does not stipulates the minimum fall requirements with regard to the OP question.
From your link:

and

You are assuming the floorwaste he has is not a mandatory one and is set below the waterbar. I have been taken to the tribunal over these matters before resulting in a floor being removed and relaid so you need to ensure compliance

[rwbuild]

Read this !! It also gives the minimum and maximum grading to floor wastes
Alternate compliance options for waterproofing (https://hia.com.au/resources-and-advice/building-it-right/building-codes/articles/alternate-compliance-options-for-waterproofing?_cldee=6W9AYNVDTxe6aXWJ2nMc0eHig9KarTjI4n4xIbdDxRZ_8Y3j8pwodXvCgy55QJj1&recipientid=contact-b690a4071fefe51188d200155dddfa01-44dbc94aab144932bc852869c574a2a3&esid=b67648de-54ff-ed11-a83c-000d3ad0cb16)

[garfield]

Thanks for the replies men.

Looking at pics of bathrooms on Google most if not all of the floors look almost flat. I know you cannot quite tell via pictures but to the naked eye and looking at levels along the walls etc they do seem like there is bigger all fall.