Bathroom Trays — Types, Costs, and What to Know Before You Specify
The bathroom tray decision is one of the first calls you make in a wet area renovation and one of the least well-explained. Most homeowners pick a tray based on what’s in stock at the supplier or what the tiler recommends on the day. That’s not always wrong — but it can mean the tile selection, drainage fall, and waterproofing specification get worked out backwards, around a product choice that was never properly evaluated.
This guide covers the main bathroom tray types available in Australia, what each one costs to supply and install, and what the waterproofing and compliance requirements look like for each approach. Lifestyle Bathrooms connects homeowners with vetted, licensed renovation specialists across Australia. We’re a referral and connector service, not a contractor. The purpose here is to give you what you need to walk into a quote conversation prepared — not to sell you a particular product.
What Is a Bathroom Tray?
A bathroom tray — also called a shower tray or wet area floor former — is the base unit of a shower enclosure. It sits on the subfloor, captures water, and directs it toward a drain. That’s the function. The form varies considerably: prefabricated trays come as a single manufactured unit in acrylic, stone resin, or composite materials. Tile-over formers are pre-formed substrates engineered specifically for tiling over. And some shower floors aren’t trays at all — they’re built in place by the tiler using screeded mortar, waterproofed, and tiled from scratch.
The distinction between a prefabricated tray and a tiled-to-floor wet area matters more than most people realise going in. It affects the waterproofing specification, the tile selection, the trades involved, and how the installation sequences. A prefabricated acrylic tray installs in a day. An in-situ tiled wet area involves screed, cure time, waterproofing, inspection, and then tiling — spread across a week or more. Neither is inherently better. The right choice depends on the layout, the existing waste position, the tile format you’re planning, and what you’re trying to spend. That’s what the rest of this guide covers.
Bathroom Tray Types Available in Australia
The Australian market offers five main categories of bathroom tray — and they’re not interchangeable. Each has different installation requirements, different tile compatibility, and a different cost profile. What suits a rental property ensuite renovation won’t necessarily be the right call for a large-format tile wet room in a prestige fitout.
The most common entry-level product in the Australian market. Moulded as a single piece, lightweight, and straightforward to install. The surface is non-porous and easy to clean, but it scratches — abrasive cleaners and hard water deposits are the main culprits. Under normal residential use, expect 10 to 15 years, sometimes longer with careful maintenance.
The practical choice when budget and installation speed are the priorities. Standard in rental property renovations and entry-level fitouts. One firm limitation: acrylic is not a suitable surface for tile adhesion — if a tiled finish is part of the brief, a different tray type is required.
Best for: Rental properties, budget renovations, ensuites where a tiled finish isn’t required.
A step up in material quality — mineral composite pressed with resin. Heavier than acrylic, more rigid, and noticeably more scratch-resistant. The surface holds up better to cleaning products over time and doesn’t flex underfoot the way acrylic can in larger-format trays.
Stone resin trays have grown in popularity in Australian mid-range renovations as pricing has come down. Installation is still faster than a tiled wet area. Some are tile-ready — confirm with the manufacturer before specifying tiles over any surface not explicitly rated as tile-compatible.
Best for: Mid-range renovations, homeowners wanting a step up from acrylic without the cost and complexity of a tiled wet area.
A pre-formed substrate unit — typically compressed foam or cement-based composite — engineered for tiling directly over the surface. The drainage fall is built in during manufacture, so the tiler doesn’t need to screed it by hand. That’s the core advantage: consistent, accurate fall without depending on site execution.
Important: the former is not a waterproofing system. Waterproofing membrane to AS 3740 is still required over the former surface and at the perimeter before tiling proceeds. The former changes the substrate — it does not change the compliance obligation.
Best for: Mid-range renovations, larger tile formats, projects where drainage fall accuracy is a concern.
Solid surface shower bases — Corian-type acrylic composite, custom or semi-custom fabricated — are used in premium bathrooms where a seamless, grout-free finish is part of the design brief. The surface can be re-sanded and refinished if scratched. No grout joints to maintain over time.
A specialist product requiring a specialist installer. Not common in standard residential renovation — it typically appears on architect-led or designer-specified projects where finish quality is the primary brief.
Best for: Prestige renovations, custom fitouts, projects where grout-free shower floors are a deliberate design intent.
This isn’t a product — it’s a method. The shower floor is built in place: mortar screed laid and formed to achieve the required drainage fall, waterproofed to AS 3740, inspected, then tiled. The result is a fully tiled floor with no visible tray unit and no constraints on size or shape.
Design flexibility is the primary advantage. Large-format tiles, barrier-free accessible showers, irregular enclosure sizes — all require an in-situ wet area. The waterproofing scope is larger: the entire floor surface needs membrane, not just the perimeter. Skilled trade execution is non-negotiable.
Best for: Barrier-free showers, large-format tile designs, renovations where a visible tray edge is not acceptable.
Sizes, Formats, and Layout Considerations
Standard prefabricated trays in Australia come in square formats from around 700×700mm up to 1000×1000mm, rectangular formats up to 1800×900mm in common configurations, corner-entry (quadrant) formats for bathrooms where a straight-entry enclosure won’t fit, and barrier-free formats with no raised threshold. Beyond those sizes, you’re into tile-over former territory or an in-situ poured wet area — manufactured trays don’t come in non-standard dimensions.
The variable that catches most homeowners out isn’t the tray size — it’s the waste position. A manufactured tray has its drain in a fixed location: centre, offset, or corner depending on the model. If the existing floor waste sits somewhere else, one of two things needs to happen: you select a tray whose drain position aligns with the existing waste, or the waste gets relocated. Relocating a floor waste is a licensed plumbing scope item — it involves cutting into the subfloor, repositioning the drain line, and making good. That adds cost and lead time, and it needs to be established before a tray is ordered, not after it arrives on site.
Substrate type matters too. Concrete slab and timber subfloor installations have different requirements — some trays have minimum height specifications above finished floor level, and fixing methods vary. A tray that works cleanly on a slab can create a step-in height problem on a timber subfloor where additional build-up isn’t feasible. The practical instruction: confirm the existing waste position and substrate type before settling on a tray type or size. Those two facts determine what’s achievable without additional structural scope turning up as a variation.
Waterproofing Requirements — What Applies to a Bathroom Tray Installation
Wet area waterproofing in Australia is governed by AS 3740 (Waterproofing of Domestic Wet Areas) and the National Construction Code. The standard applies to all wet area installations — including those that use a prefabricated tray. A manufactured tray is not a substitute for waterproofing membrane. It’s a shower floor base. The two things serve different functions.
What changes between a tray installation and an in-situ tiled wet area is the extent and location of the waterproofing: with a prefabricated tray, membrane is required at the perimeter, wall junctions, and any penetrations where water can reach the substrate behind or beneath the unit. With a tile-over former or poured wet area, the full floor surface requires membrane before tiling proceeds. A smaller area to waterproof doesn’t mean a lesser waterproofing standard — it means the membrane goes where that installation type requires it.
Waterproofing must be carried out by a licensed waterproofer — not the tiler, not a labourer, not whoever is on site and available that day. In NSW, wet area waterproofing is a licensed trade under NSW Fair Trading. Other states operate under equivalent licensing frameworks. After the membrane is applied, it must be inspected before tiling covers it. A certificate of compliance is issued at that inspection. Tiling then proceeds.
This is a mandatory step, not a paperwork formality that experienced contractors skip. The inspection happens while the membrane is visible. You can’t retrospectively inspect something that’s been tiled over.
The certificate matters well past practical completion. At the point of sale, it’s evidence that a licensed party inspected the waterproofing — without it, a solicitor or building inspector acting for the buyer can flag the wet area as non-compliant, which becomes the vendor’s problem to resolve before settlement. For insurance purposes, a water damage claim involving a wet area without compliance documentation gives an insurer grounds for a coverage dispute. Don’t accept a quote that omits the waterproofing certificate as a line item. If it’s missing, ask why before anything is signed.
Related: The full AS 3740 waterproofing requirements — what the inspection covers, who is licensed to carry it out, and what the certificate documents — are in our dedicated waterproofing compliance guide. See our AS 3740 waterproofing compliance guide ›
What Bathroom Trays Cost in Australia
The figures below are directional industry estimates — not quotes. Two costs are relevant for any tray installation: what the product costs to buy (supply only), and what the full installation costs once substrate preparation, waterproofing to AS 3740, and labour are included. The gap between those two numbers is where most tray budget surprises come from. The product price is visible at the supplier. The compliance and installation costs are not always clearly separated in a quote.
The variables that move actual costs: whether the existing waste position needs relocation (licensed plumbing scope, additional cost and time); the condition of the existing substrate, because levelling compound and preparation work are commonly assumed in quotes but charged as a variation when the floor isn’t what was assumed; regional trade rates, which carry a small premium compared to metro rates in some parts of Australia; and tile specification for any tiled installation, where a larger or more expensive tile increases both materials cost and installation time. A quote with a lower headline number that doesn’t include the waterproofing membrane and certificate of compliance isn’t cheaper — it’s incomplete. The question to ask is not “what’s the total?” It’s “what does this total include?”
Related: The full line-item breakdown for bathroom renovations in NSW — covering what each trade item should include and how to read a quote accurately — is in our renovation cost guide. See our bathroom renovation cost guide ›
Tile-Over Tray or Tiled Wet Area — Which One Is Right?
This is the most common specification question for homeowners planning anything above a basic refresh. The short answer is that both approaches work, and neither is automatically better. The decision turns on the specifics of the project: shower size, tile format, budget, and what the finished bathroom needs to look like. Before the comparison — both options require a licensed waterproofer. A tile-over former doesn’t simplify or reduce the waterproofing obligation. It changes the area to which membrane is applied.
The drainage fall is set by the manufacturer. It doesn’t depend on the tiler screeding it accurately by hand — which sounds like a minor detail until you’ve stood in a shower that pools around your feet.
Installation is faster. The former goes in, waterproofing is applied and cures, it’s inspected, and tiling starts. No mortar screed stage means fewer days on site and less downtime between trades.
Tile-over formers suit standard shower enclosures and tile formats up to approximately 600×600mm — check the specific former’s rated tile size. They’re a practical, cost-effective choice for most mid-range renovations.
The limitation: There’s a visible edge where the shower floor meets the bathroom floor. If the design intent is a continuous tile plane running unbroken from bathroom to shower, a tile-over former won’t deliver that.
No tray edge. The shower floor sits flush with the bathroom floor. For barrier-free accessible showers this is the only workable approach. For large-format tiles running continuously across the floor — 600×1200mm and larger — it’s often the only practical one.
Design flexibility is the main advantage. Any shape, any size, any tile format — the wet area is built around the brief, not around a manufactured product’s dimensions.
The trade-off is real. The drainage fall is achieved by hand, and it depends on the tiler’s skill. The waterproofing scope is larger: the entire floor surface requires membrane, not just the perimeter and penetrations.
The limitation: Cost is typically higher than a tile-over former for equivalent floor area — more screed and waterproofing labour, and a longer installation sequence.
The compliance requirements are identical regardless of which approach is used: licensed waterproofer, AS 3740 membrane, inspection before tiling, certificate of compliance. The method changes the extent of waterproofing required. It doesn’t change who has to carry it out or what documentation is needed at the end.
What to Ask Your Contractor Before You Specify a Tray
Most renovation budget blowouts and post-completion disputes trace back to a quote that didn’t cover what the job actually required. The questions below are the ones that expose missing scope items, skipped compliance steps, and cost items that tend to disappear from low quotes and reappear as variations once work has started and you’re committed.
Where is the existing floor waste, and does it need to be relocated?
A manufactured tray has its drain in a fixed position. If that position doesn’t match the existing waste location, one of them has to move. Waste relocation is a licensed plumbing scope item — not a minor variation. Establishing this before a tray is selected or ordered saves a significant amount of rework.
What waterproofing specification are you quoting to, and does the quote include the certificate of compliance?
The certificate documents that a licensed waterproofer applied the membrane and that it was inspected before tiling covered it. If it’s not listed as a line item, find out whether it’s been left out or billed separately. Both are worth knowing before you sign.
Who is carrying out the waterproofing, and can you provide their licence details?
Wet area waterproofing must be done by a licensed waterproofer — not the tiler, not an unlicensed subcontractor. Ask for the licence number and check it against the NSW Fair Trading register. It takes two minutes and confirms the statutory warranty under the Home Building Act 1989 applies to the finished work.
Is this tray compatible with the tile format I’ve chosen?
Tile-over formers are rated to maximum tile sizes that vary by product. Specifying a 600×1200mm tile over a former not rated for large-format installation creates adhesion failures and lippage — both rectification problems. Confirm tile and former compatibility before either product is ordered. Not after.
What fall is the tray or former designed to, and how is it confirmed on site?
Drainage fall must be sufficient to prevent standing water. Prefabricated trays have a set fall built in. In-situ wet areas depend on the tiler’s execution. Ask what the fall specification is and how the tiler confirms it before tiling starts. It’s a question that tells you something about how seriously the contractor approaches the technical side of the work.
What substrate preparation is included in this quote?
Substrate levelling compound and primer are materials and labour that cost real money and are routinely missing from low quotes. A quote that doesn’t allow for substrate preparation is either assuming the existing floor is perfectly level and sound — which is rarely the case in older homes — or planning to skip it on site. Ask specifically what’s been allowed before you accept the figure.
Ready to Discuss Your Bathroom Tray Specification?
Submit a quote request and a specialist will be in touch within 48 hours to talk through scope, tray type, and what the compliance requirements look like for your specific project. No obligation. No travelling salesperson. A direct conversation about your bathroom.
Lifestyle Bathrooms is a referral and connector service, not a licensed contractor. We connect homeowners and property professionals across Australia with vetted, licensed bathroom renovation specialists. All renovation work is carried out by independently licensed contractors.
Common Questions About Bathroom Trays
A shower tray is a product — a manufactured unit that forms the floor of a shower enclosure. A wet area is the end result: the waterproofed shower floor, however it was built. A shower tray is one way to construct a wet area. An in-situ tiled floor built from screeded mortar is another. The waterproofing requirements under AS 3740 apply to both approaches — the tray doesn’t change the compliance obligation, it changes the method of construction.
Yes. A prefabricated tray changes where waterproofing membrane is applied — it doesn’t remove the requirement. The perimeter seals, wall junctions, and penetrations around any shower tray still require waterproofing membrane applied by a licensed waterproofer, inspected, and certified before tiling proceeds. The tray is a shower floor base. It is not a waterproofing system, and it was never designed to function as one.
No. Only tile-ready (tile-over) formers are engineered for tiling. Acrylic and fibreglass trays are not suitable surfaces for tile adhesion — the material has too much flex, and the bond fails under normal use. Stone resin trays vary: some are tile-compatible, others are not. Check the manufacturer’s specification for any tray you’re planning to tile over, and get that confirmation in writing before the product is ordered.
A prefabricated acrylic or stone resin tray — not tiled — typically installs in one to two days of active trade time, not counting waterproofing cure periods or time between trade visits. A tile-over former with tiling runs across stages: former installation, waterproofing and cure (minimum 24 to 48 hours before any tiling proceeds), then tiling — usually four to six days in total. An in-situ poured wet area takes longer: mortar screed, cure, waterproofing, cure again, then tiling — typically five to seven days of active work spread across a week and a half or more. None of these figures include the lead time before works commence, which in regional areas can run several weeks depending on trade availability.
Supply-only cost for an acrylic tray runs around $150 to $600 depending on size and brand. The installed cost — including substrate preparation, waterproofing to AS 3740, and labour — is generally $1,200 to $3,000 for a standard acrylic tray. Stone resin installed sits in the $2,000 to $4,500 range. Tile-over formers with tiling included: $2,500 to $5,500 and up, depending on tile specification and floor area. These are directional ranges — not quotes. Waste relocation, existing substrate condition, and site access are the main variables that move the actual figure. See our bathroom renovation cost guide for a full trade-by-trade breakdown ›
The certificate of compliance can’t be issued after tiling has covered the membrane — the inspector can’t see what they need to inspect, and they won’t certify work they can’t verify. Without the certificate, the waterproofing compliance can’t be demonstrated. Three concrete problems follow: statutory warranty coverage under the Home Building Act 1989 is affected; a home insurance claim involving water damage to the wet area gives the insurer grounds to dispute coverage; and when you sell the property, the absence of compliance documentation will be picked up by the buyer’s solicitor or building inspector and becomes the vendor’s problem to resolve before settlement. The inspection is mandatory. Contractors who skip it aren’t experienced enough to know they can — they’re cutting corners and leaving the liability with the homeowner.
Bathroom Tray Selection, Installation, and Compliance — Done Right
The specification calls that determine how a bathroom renovation holds up — tray type, waterproofing scope, waste position, tile compatibility, compliance documentation — all get made before a tiler arrives on site. Getting them right in any market takes the same rigour. That’s what the Lifestyle Bathrooms referral process is built around: connecting homeowners with licensed specialists who understand what those decisions require and carry out the work to a documented standard.
Lifestyle Bathrooms is a referral and connector service, not a licenced contractor. We connect homeowners, investors, and property professionals across Australia with vetted, licenced bathroom renovation specialists. All renovation work is carried out by independently licenced contractors.