Choosing bathroom tiles for grip, drainage and easy cleaning
A tile can look perfect under showroom lights and still be wrong for a wet shower, difficult to form to the waste or exhausting to keep clean. Choose the surface, format and grout layout as one system, then check the test report and installed cost before ordering.
What P, R and barefoot ratings actually tell you
AS 4586 classifies slip resistance using different test methods. The wet pendulum scale runs from P0 to P5, with higher numbers indicating more grip in that test. The oil-wet ramp scale runs from R9 to R13, and the wet barefoot test uses A, B and C. These results are not interchangeable, and a product described only as “non-slip” has told you almost nothing. Ask the retailer for the exact test report and confirm it applies to the finish and batch you are buying.
For a normal family bathroom, P3 is a common practical starting point for the main floor and P4 is a conservative request for an open shower or an area that will often remain wet. That is selection advice, not a claim that one P rating is mandated for every residential bathroom. The right balance depends on users, cleaning, whether the shower is enclosed and how water reaches the rest of the floor. An accessible walk-in bathroom deserves particular attention because a level entry removes the hob that normally contains water.
More texture is not automatically safer in daily life if soap film fills deep surface relief and the floor is never scrubbed properly. Rub a wet sample with a little diluted soap, view it under side light and ask how the manufacturer says to clean it. Avoid polished floor tile in a shower, regardless of how attractive the wall display looks.
Match tile size to the waste and floor falls
A shower floor must drain without ponding and the current Housing Provisions use a minimum 1:80 fall in the relevant shower construction. With a central point waste, the tiler forms several planes that meet at the outlet. A 50mm to 100mm mosaic follows those planes neatly and its extra grout joints add useful grip. A 600mm square tile cannot bend, so it needs envelope cuts that may be visually busy and can create sharp lippage if poorly set.
Large-format tile works best where the drainage is designed for it. A linear waste at one edge can allow a single-plane fall, but it adds the cost of the channel, detailed waterproofing and exact setting out. Expect roughly $700 to $1,800 for a quality linear waste and installation impact, depending on length and drainage changes. The alternative is to use the large tile on the bathroom floor and a matching mosaic in the shower, which is usually simpler and more forgiving.
If a floor waste is installed outside the shower, the floor must be graded to it. That affects door thresholds, vanity clearances and the first row of wall tile, so decide it before screeding. Waterproofing sits below the finish and cannot be corrected with extra grout. Review the membrane sequence in our AS 3740 waterproofing guide.
Realistic 2026 tile costs
Good serviceable porcelain is commonly $35 to $70 per m² to buy, with premium or decorative products around $70 to $140 per m². Standard laying commonly costs $120 to $220 per m² before tile supply. Mosaics, stone, rectified panels, mitred edges and patterns can lift labour to $180 to $320 per m² because every sheet, cut and alignment takes longer.
A typical 3m² bathroom may contain 20 to 28m² of tiled surface when walls go to the ceiling. At 24m², changing tile supply from $45 to $95 per m² adds $1,200, while changing from a straight 300mm by 600mm layout to a labour-heavy pattern can add another $1,500 to $3,000. Price the whole surface area, trims, niches, mitres, grout and sealing, not the shelf price of 1 tile. Broader project allowances are listed in our Pakenham bathroom pricing guide.
Order 10% extra for a simple grid and 15% for patterned layouts, niches or many cuts. Check every carton carries the same shade and calibre code before laying, and retain at least 1 unopened box. A replacement from a later batch can be visibly different even when the product name is unchanged.
Porcelain floor, ceramic wall and fewer fussy details
Porcelain is usually the dependable floor choice because its water absorption is generally 0.5% or less and it resists wear. Ceramic is often perfectly suitable on walls, easier to drill and cut, and may save $10 to $30 per m². A mixed specification is sensible: textured porcelain underfoot, compatible mosaic in the shower and an easier-clean ceramic or porcelain wall tile.
Pakenham and Officer houses are commonly slab-on-ground, and parts of the district have reactive clay soils. Tile does not tolerate movement, so substrate preparation and movement joints matter more than buying a more expensive tile. Ask how existing cracks will be assessed, where movement joints will continue through the finish and whether the adhesive system suits underfloor heating if included. Covering a moving crack with large porcelain does not make it disappear.
Choose and order 4 to 6 weeks before the planned start, especially for a specific batch or imported finish. Indoor tiling can run year-round, but products still need their specified curing conditions and the waterproofing program cannot be rushed in cold weather. The best result comes from having every carton on site before demolition and protecting the spare batch through handover.
Tile selection questions answered
Set out the tile and drainage together
We measure the surfaces, plan the falls and price the selected format before the contract is signed.