A walk-in shower needs a correctly positioned waste, an even fall in the screed, and a slip-rated floor tile to be safe and practical. Linear drains make step-free entries easier and suit large-format tiles, while centre drains work well in compact spaces. Frameless glass must be toughened safety glass with solid fixings, and all waterproofing must comply with AS 3740.
01Linear versus centre drains
A walk-in shower needs a floor waste that the tiled floor can fall towards. The two common options are a centre drain and a linear drain. A centre drain is a square or round grate set near the middle of the shower floor. The tile bed is screeded with falls from all sides down to that point. This creates a slightly dished feel underfoot; some people dislike it, others hardly notice. It works well in compact bathrooms and is simple when the waste pipe is already central.
A linear drain is a long channel running along one edge of the shower or across the doorway. The floor can be laid as a single flat plane sloping in one direction to that channel. This feels more even underfoot and suits large-format tiles, because you avoid many angled cuts. Linear drains also make a hobless entry easier. Relocating the waste to suit a linear drain should be done by a licensed plumber.
02Falls and waterproofing
The fall of the shower floor moves water to the drain. It must be set before waterproofing and tiling. Too shallow and water ponds; too steep and the floor feels uneven. The tiler or builder creates the fall in the screed, working from the waste position. The plumber sets the waste and trap height, and the waterproofer applies the membrane over the screed and up the walls, including corners and junctions. The membrane must be continuous and turn up the walls at shower boundaries.
Residential wet area waterproofing is covered by AS 3740. In Victoria, waterproofing must be done by a licensed or registered practitioner. Ask for a compliance certificate or photographic record before tiling. A water test before tiles go down is a good way to confirm the membrane holds.
03Frameless glass screens
Frameless glass gives a walk-in shower its open look, but it needs solid detailing. Shower screens must be made from toughened safety glass meeting the Australian Standard. Panel thickness is usually 10 mm or 12 mm. Wall fixings need timber or ply backing behind the tiles, so plan this before the walls are closed up.
A screen that is too short or too far from the shower rose will let water escape. The panel should extend past the shower head to contain the spray. Keep the bottom gap small enough to stop splashes but large enough for the door or panel to move. Large or open showers often need a return panel. A fixed panel may need bracing or a ceiling support. Follow the glass manufacturer's fixing instructions.
04Tile selection and slip resistance
Shower floor tiles need grip when wet. Look for a slip-resistance rating intended for wet barefoot areas, often marked P3 or P4 in Australia. A matte, textured or honed finish grips better than a gloss surface. Check the rating before you buy, not after tiling.
Porcelain is dense and absorbs little water, making it a practical shower floor tile. Natural stone needs more sealing and maintenance. Mosaics improve slip resistance through extra grout lines but add cleaning. Large-format tiles work well with a linear drain because of fewer cuts. Use an epoxy or flexible grout in wet areas.
05Planning the walk-in layout
Plan the shower layout before choosing drains and tiles. A doorless walk-in works if the opening is away from the main spray and the screen is large enough. If you use a door or return panel, make sure it does not hit the vanity, toilet or towel rail. A recessed walk-in should be at least about 900 mm by 900 mm, but more space feels better.
Plan where the shower rose, niche and grab rail will sit. If renovating for long-term use, reinforce walls for future grab rails and keep the floor level with the bathroom for step-free entry. Ventilation matters because frameless screens do not enclose steam as tightly as framed cubicles.
06Getting it right in a Melbourne renovation
Melbourne homes range from timber-floored period bathrooms to newer slabs, so drainage and fall details must be worked out on site. If the waste moves, a licensed plumber must extend the drain. The fall depends on finished floor height and joist or slab position. Your waterproofer and tiler should work from the same set-out.
If you want to compare linear drains, shower screens and slip-rated tiles, visit Baroco Interior Innovations at 21/105-111 Ricketts Road, Mount Waverley. The showroom displays these products and the team can talk through your layout. Because it is a working renovation studio, you can see products in context rather than just online. Call 0426 520 859 ahead to arrange a time.
Planning this for your home? See how we design, supply and build it, or visit the Mount Waverley showroom.
Bathroom renovations · Try the AI bathroom previewRelated questions
Still unsure? Call 0426 520 859 and talk to someone who actually installs this stuff.
Do I need a linear drain for a walk-in shower?
No. A centre drain can work in a walk-in shower, but a linear drain often makes the entry easier because the floor slopes in one direction and you avoid a hob. The right choice depends on waste position, floor structure and tile size. A licensed plumber can confirm what is possible.
Can I use large-format tiles on a shower floor with a centre drain?
It is possible but not always practical. A centre drain needs multiple slopes converging from all sides, which means angled cuts in large tiles. A linear drain reduces the number of cuts and lets large tiles lay flatter. Your tiler should confirm before you buy.
How do I stop a frameless shower screen leaking?
Position the panel to block the main spray, extend it past the shower rose, and keep the bottom gap small but workable. Add a return panel if the shower is open to the room. Make sure the wall behind the fixings has solid blocking. Test the screen after installation.
What tile is safest for a walk-in shower floor?
Choose a tile rated for wet barefoot areas, often marked P3 or P4 in Australia. A matte, textured or honed porcelain tile is usually a safe, low-maintenance option. Check the slip rating with the tile supplier and avoid polished or gloss finishes in the shower.
