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Tiling in Shower Recesses

The minimum standard required for wet areas in residential buildings is contained in the Building Code of Australia (BCA) and AS3740 – Waterproofing of wet areas in residential buildings. This includes tiling and gradients of bathroom floors including shower recesses.

The recommended ratio of fall within showers is between 1:60 and 1:80. However, the ratios may not be achieved due to:

(a) The size of the tiles used – falls become more difficult to achieve with larger tiles.

(b) The area of the flool to be drained.

In these cases, the effectiveness of the floor drainage should be measured by the performance of the floor. If water does not remain on the finished floor in a manner that can adversely affect the health or amenity of the building occupants or deteriorate building elements it may be deemed adequate.

Discuss your concerns with your builder with these factors in mind.

4 responses to “Shower Floors – Slope”

  1. Hammersley says:

    Please can you let us know if shower floors have spaces where water can get trapped under the tiles?

    we are wondering this based on my husbands idea that there may be a space under the tiles for some design reason.

  2. Chris Greenall says:

    Hi I have a question…we have just had a bathroom reno completed _ open shower, walk in with no hob and small floor waste which the waste water fails to completely empty and flows to door and vanity areas – which we thought would remain dry. Waste water eventually drains away. The only way we have found to avoid this is to roll up a towel to dam the water from its course. Other than redoing this job and fitting a 600 to 800mm floor grate waste insitu. Any other options/suggestions out there please?