Thread: Bathroom floor waste

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


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Some reading here:
To grade, or not to grade | ABCB

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.

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.

Originally Posted by 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.

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

Originally Posted by droog

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

Originally Posted by Beardy

This should help you
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.

Originally Posted by droog

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

Read this !! It also gives the minimum and maximum grading to floor wastes
Alternate compliance options for waterproofing

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.