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What counts as a large-format tile
A large-format tile is any tile where one side is 400 millimetres or longer. Common bathroom sizes are 300 by 600, 600 by 600 and 600 by 1,200 millimetres. Some suppliers now offer 800 by 1,600 and even 1,200 by 1,200 panels for feature walls.
The trend toward larger tiles has been building for years. Fewer grout lines give the room a cleaner, more seamless look and make the space feel larger. But larger tiles bring specific installation requirements that smaller tiles do not.
The visual advantage
Fewer grout lines mean less visual interruption. A wall covered in 600 by 1,200 tiles reads as a continuous surface rather than a grid. In a small bathroom, this effect makes the room feel more spacious.
Large-format tiles also show the tile pattern — veining, texture, colour variation — more clearly. A marble-look porcelain tile at 600 by 1,200 displays the veining across a single piece rather than cutting it into small fragments. The result looks more natural and less repetitive.
Our colour schemes guide covers how tile format and colour work together to set the room's tone.
Installation requirements
Large tiles need a flat substrate. Even a slight variation in the wall or floor surface — 2 to 3 millimetres over a metre — causes lippage, where one edge of the tile sits higher than the next. The substrate must be prepared to a tighter tolerance than for smaller tiles.
The adhesive matters. Large tiles need a high-bond, flexible tile adhesive applied with a notched trowel in a pattern that ensures full coverage across the back of the tile. Spot-fixing — applying adhesive in dabs — risks voids under the tile, which can crack under load or movement.
Cutting large-format tiles requires a tile saw large enough to handle the size. Curved cuts, around pipes and drains, are harder and produce more waste. Plan on ordering 15 to 20 percent more tiles than the measured area to account for cuts and breakage.
Where large-format tiles work best
Feature walls. A single wall behind the vanity or in the shower recess in a large-format tile creates a focal point. The rest of the room can use a simpler, smaller tile to balance the visual weight.
Floor tiles in open areas. A 600 by 600 or 600 by 1,200 tile on the floor of a larger bathroom reduces grout lines and is easy to clean. In a compact bathroom, a single row of 600 by 1,200 tiles may be all the floor needs.
Wall tiles in showers. Large tiles on the shower walls reduce the grout area, which reduces the surface that needs regular sealing and cleaning. A shower with four large tiles per wall looks cleaner than one with twenty small tiles.
Where they are harder to use
Shower floors. The floor of a walk-in shower is graded to a drain. A large tile cannot follow a multi-directional gradient without either lippage or visible cuts. Shower floors suit smaller tiles — mosaics or 100 by 100 tiles — that follow the curve of the fall.
Small rooms with many fixtures. A bathroom with a toilet, vanity, shower recess and door frame in a tight space has many cuts and junctions. Large tiles mean more waste and more complex cutting around obstacles.
Curved or uneven walls. Older homes with walls that are not plumb or flat need more preparation before large tiles can go on. The cost of straightening the substrate can offset the savings from fewer tiles.
Cost considerations
Large-format tiles are not always more expensive per square metre than smaller tiles. Many popular porcelain ranges cost the same across sizes. The cost difference is in the installation — large tiles take more time to handle, more care to set and more skill to cut.
Labour costs are typically higher for large-format tiles because the tiler works more slowly to get the substrate right, handle the tiles without breaking them, and achieve a flat, lippage-free finish. A 600 by 1,200 tile that cracks during cutting wastes eight times the material of a 300 by 300 tile.
The total cost depends on the room size, the tile size, the number of cuts and the substrate condition. ETR's on-site measure confirms what is practical and quotes accordingly.
How ETR handles large-format tiles
Large-format tiles are selected during the planning phase, before the quote is finalised. The tile choice affects the substrate preparation, the adhesive specification and the tiling time. The written quote accounts for these requirements.
Adam Dawood has over 25 years in tiling and project management. The team handles large-format tiles regularly, including full-height feature walls and floor-to-ceiling shower tiles. Every bathroom is waterproofed to AS 3740 with a compliance certificate. A free on-site measure anywhere in Sydney is the starting point.
Frequently asked questions
Are large-format tiles more expensive than standard tiles?
The tiles themselves are often the same price per square metre. The cost difference is in installation — large tiles require a flatter substrate, more careful handling, and higher-skill cutting. Labour costs are typically higher, and waste from breakage costs more per tile.
Can I use large-format tiles in a small bathroom?
Yes. Large tiles can make a small bathroom feel more spacious by reducing grout lines. A 300 by 600 or 600 by 600 tile works well in most small rooms. Very large tiles (600 by 1,200 or bigger) may produce more waste from cuts in a tight space.
Can large-format tiles be used on a shower floor?
Generally not. Shower floors are graded to a drain, and large tiles cannot follow the gradient without lippage or awkward cuts. Smaller tiles — mosaics or 100 by 100 tiles — follow the fall more easily and provide better grip on a wet surface.
What causes lippage with large-format tiles?
Lippage happens when one edge of a tile sits higher than the next, usually because the substrate is not flat enough. Large tiles span more surface area, so even small variations in the wall or floor become visible. Proper substrate preparation is the fix.
What grout width should I use with large-format tiles?
A 1.5 to 2 millimetre grout joint is standard for large-format rectified tiles. Narrower joints emphasise the seamless look. The tile manufacturer specifies the minimum joint width — going below it can cause cracking if the tile or substrate moves.