Bathroom Tile Selection in Australia: Cost, Durability and Slip Rating

Last updated: 15 June 2026 · By Mossy Tariq, Founder — Property Blueprint Co.

Bathroom tile selection is the decision most homeowners make last and pay for first. The tile gets chosen for how it looks on a sample board, ordered, delivered, and only then does the slip rating, the wear rating and the way it sits over the waterproofing membrane start to matter — usually once it is already on the floor.

That order is backwards. A bathroom tile is the one finish in the room that has to do three structural jobs at once, and colour is the least important of them. Choosing it the way you would choose a paint colour is how a tile that looked right in the showroom becomes a floor that is dangerous when wet, a wall that crazes within two years, or a shower base the tiler has to lift because the falls were never going to drain.

A bathroom tile is not a colour. It is a slip rating, a wear rating and a waterproofing decision that happens to come in a colour.

What follows is the order a prepared homeowner makes the decision in: what the tile has to do, what it costs in Australia, how to read the two ratings that actually matter, and where the choice gets locked in the renovation sequence so it never holds up the trades. Get the sequence right and the colour is the easy part.

Why bathroom tile selection costs more to get wrong than any other finish

Every other finish in a bathroom can be changed later. Paint, a mirror, tapware, even a vanity can be swapped on a weekend. A tiled floor and a tiled wall cannot. The tile is bonded with adhesive to a substrate that sits over a waterproofing membrane, and in a wet area that membrane is the thing keeping water out of the building structure. Lifting tile to correct a bad selection means breaking that bond, and breaking the bond over a shower or floor means disturbing the membrane underneath. That is not a finish swap. It is a partial rebuild of the wet area.

This is why tile is the finish where the gap between what the homeowner knows and what the tiler knows costs the most money. The tiler can tell from the box whether a tile is rated for a wet floor, whether it will lip on a large-format layout, and whether the grout joint you have specified is even workable. The homeowner sees a colour and a price per square metre. Closing that gap before the order goes in is the same discipline that separates a renovation quote you can read from one you sign on trust — reading the quote and reading the tile specification are the same skill applied to two different documents.

What a bathroom tile actually has to do

Before a single sample comes home, a bathroom tile has to clear five tests that have nothing to do with how it looks. A prepared homeowner checks these in order, because the first two are safety and compliance decisions and the rest are budget decisions.

1. Resist slipping when the floor is wet. A bathroom floor is wet by design, so the floor tile has to carry a slip rating suited to a wet barefoot area, not whatever the showroom had in stock. This is the single test most homeowners skip.
2. Survive foot traffic without wearing through the glaze. Glazed tiles carry a PEI abrasion rating, and a wall tile rated for no traffic will dull and scratch within a year if it is laid on the floor instead.
3. Refuse to absorb water. Porcelain rated as impervious absorbs less than 0.5 percent of its weight in water, which is why it outperforms most ceramic and all natural stone in a shower or on a floor that stays damp.
4. Sit flat across the format you have chosen. A large-format tile demands a flatter substrate than a small one, because any dip in the floor telegraphs straight through as lippage — one tile edge standing proud of the next.
5. Stay maintainable for the life of the room. Natural stone needs sealing, dark grout fades, light grout stains, and the tile you choose decides how much cleaning and resealing the room asks of you every year.

A tile that fails any of the first three is the wrong tile regardless of price or colour. A tile that fails the last two is a tile you will resent rather than replace. The selection is a process of elimination against these five before aesthetics gets a vote.

How much do bathroom tiles cost in Australia

Tile pricing in Australia separates into two numbers that homeowners routinely merge: the supply cost of the tile itself, and the labour cost to lay it. Australian tiling cost guides through 2025 and 2026 put supply costs in broad bands by material. Ceramic wall and floor tiles run from roughly $20 to $60 per square metre. Porcelain, the workhorse of most Australian bathrooms, sits around $50 to $120 per square metre. Natural stone such as marble and travertine ranges from about $65 to $200 and beyond, and feature or mosaic tiles climb from $90 to over $300 per square metre.

Labour is the number that surprises people. Bathroom tiling labour typically runs from $45 to $150 per square metre depending on tile size, layout complexity and city, with bathrooms averaging higher than open floors because of cuts, niches and falls. On top of that sits waterproofing, which is its own trade and commonly adds $500 to $1,000 for a standard bathroom, and floor preparation or levelling where the substrate is not flat enough for the format chosen. A useful working rule is to order around 10 percent more tile than the measured area to cover cuts, breakages and future repairs, and more again for diagonal or patterned layouts.

The figures are ranges, not quotes, and they move with city and supplier. They exist to do one job: give you a benchmark to measure a tiler's quote against, so an upgrade from porcelain to stone is a number you chose rather than a variation you discover. The Housing Industry Association and your state consumer regulator both publish guidance on how tiling and waterproofing should be quoted and contracted.

What slip rating do you need for a bathroom floor

Slip resistance in Australia is classified under AS 4586, the standard for new pedestrian surface materials. It is tested two main ways, and the ratings do not directly convert between methods. The wet pendulum test produces a P rating from P0 to P5, where a higher number means a lower slip risk. The oil-wet inclining platform test produces an R rating from R9 to R13. A separate barefoot ramp test produces an A, B or C rating for wet barefoot areas, which is the test that matters most in a shower.

For a bathroom floor and a shower floor, the practical target most Australian suppliers and standards guidance point to is P3 or higher on the wet pendulum scale, or around R10 on the ramp scale. A glossy, low-rated tile that looks beautiful dry becomes a genuine hazard the moment it is wet and soapy. It is worth knowing that the National Construction Code only mandates specific slip ratings for stairs, ramps and landings, not general bathroom floors — which means the floor in your bathroom is a duty-of-care and best-practice decision, not one the certifier will catch for you. That makes it yours to get right. Choosing the wrong rating here is one of the most common and most dangerous bathroom renovation mistakes.

How do you read tile durability before you buy

Two ratings on the box tell you whether a tile will last where you intend to lay it. The first is the PEI abrasion rating, which runs from 0 to 5 and applies only to glazed ceramic and porcelain. PEI 0 to 2 is for walls and surfaces with no foot traffic. PEI 3 to 4 is the band for residential bathroom floors. Laying a PEI 1 wall tile on the floor because the colour matched is how a floor dulls and scratches inside a year. Natural stone carries no PEI rating because it is unglazed, and is judged instead on hardness and porosity.

The second is water absorption. Tiles described as impervious, with absorption under 0.5 percent, are the safest choice for floors and showers because they do not draw moisture into the body of the tile. Most quality porcelain meets this; much ceramic does not. The last technical decision is rectified versus non-rectified. Rectified tiles have edges mechanically ground to a precise, uniform size, which allows the thin grout joints and near-seamless look that large-format designs depend on. Non-rectified tiles vary slightly in size and need wider grout joints to absorb that variation. Neither is better — but specifying thin joints on a non-rectified tile, or a large-format tile over an uneven floor, is how you end up with visible lippage that the tiler warned about and the homeowner overruled.

Which bathroom tile mistakes cost the most

The expensive mistakes cluster in a short list. Choosing a low slip rating for a wet floor is the first, because it is both a safety risk and, once laid, a rip-up to fix. Specifying thin grout joints on a non-rectified or warped tile is the second, producing lippage and uneven lines that read as a bad job even when the workmanship is sound. Under-ordering is the third — running short mid-job means a second dye lot that does not match, or a wait that stalls the tiler. Ignoring grout colour and maintenance is the quiet fourth: dark grout fades, light grout stains, and both decisions are permanent.

The most consequential mistake is treating tile as the thing that waterproofs the room. It is not. The waterproofing membrane underneath the tile is what keeps water out of the structure, and tile and grout are not a substitute for it. Tile selection has to serve the membrane, not stand in for it — which is exactly why bathroom waterproofing is a hold point that is signed off before any tile is laid. In New South Wales and most states, waterproofing of a wet area must be done by a licensed waterproofer, not the homeowner, and the certificate is retained as proof.

Where tile selection sits in the renovation sequence

Tile selection has a fixed home in the renovation sequence, and getting it there on time is what stops it holding up the trades. In The 12-Phase System, the tile is locked at phase three — design finalisation and specification — before a single quote goes out, so every tiler prices the same tile, the same format and the same layout. A tile chosen after quoting is a variation waiting to happen.

The tile is then installed much later, only after phase nine: waterproofing and hold-point sign-off. The membrane is applied to AS 3740, the certificate is issued, and the falls to the floor waste are confirmed — and only then does tiling begin, because once the tiles are down the membrane can no longer be verified. Selecting the tile early and installing it late is the whole discipline. A homeowner working through a structured bathroom renovation planning checklist makes the tile decision once, at the right phase, and never has to revisit it under time pressure on site.

If the cost baseline is the right first step, use the free Renovation Cost Calculator for a trade-by-trade estimate of the specific bathroom, in under 5 minutes, before any tiler has quoted.

Frequently asked questions

What slip rating should bathroom floor tiles have in Australia?

Slip resistance is classified under AS 4586. For a bathroom floor and shower floor, the practical target most Australian suppliers and standards guidance point to is P3 or higher on the wet pendulum scale, or around R10 on the oil-wet ramp scale. The National Construction Code only mandates specific slip ratings for stairs, ramps and landings, so the bathroom floor rating is a best-practice and duty-of-care decision the homeowner has to make rather than one the certifier enforces.

Are porcelain or ceramic tiles better for a bathroom?

Porcelain is generally the stronger choice for bathroom floors and showers because quality porcelain is impervious, absorbing under 0.5 percent of its weight in water, and resists wear better. Ceramic is often suitable for walls and lighter-use areas and usually costs less. The decision is driven by where the tile is laid and how wet it stays, not by appearance alone.

How much do bathroom tiles cost per square metre in Australia?

Australian cost guides through 2025 and 2026 put supply costs at roughly $20 to $60 per square metre for ceramic, $50 to $120 for porcelain, $65 to $200 and beyond for natural stone, and $90 to over $300 for feature and mosaic tiles. Tiling labour typically adds $45 to $150 per square metre, with waterproofing a separate trade commonly adding $500 to $1,000 for a standard bathroom. These are benchmark ranges, not quotes, and vary by city and supplier.

What is the difference between rectified and non-rectified tiles?

Rectified tiles have edges mechanically ground to a precise, uniform size, which allows thin grout joints and the near-seamless look that large-format layouts rely on. Non-rectified tiles vary slightly in size and need wider grout joints to absorb that variation. Neither is higher quality; the mistake is specifying thin joints on a non-rectified tile, which produces uneven grout lines and lippage.

Do tiles waterproof a bathroom?

No. The waterproofing membrane applied underneath the tile, to AS 3740, is what keeps water out of the building structure. Tile and grout are finishes laid over that membrane and are not a substitute for it. This is why waterproofing is signed off as a hold point before any tile is laid, and in most states it must be carried out by a licensed waterproofer.

When should you choose bathroom tiles during a renovation?

The tile should be selected at the design finalisation phase, before quotes go out, so every tiler prices the same tile, format and layout. It is then installed only after the waterproofing hold point is signed off. Choosing the tile early and installing it late prevents it from becoming a variation or from holding up the trades on site.