Is it harder to tile with large format tiles?

The setting is not the hard part, the prep is. A big tile needs a surface flat to a straightedge, 95% thinset coverage under it (ANSI A108.5), and leveling clips to hold edges even while it cures. Get the surface flat and the rest is straightforward.

Do large tiles need a special thinset?

Yes. Big, heavy tile wants a medium-bed or large-and-heavy-tile mortar, which is thicker and does not slump, so the tile does not sag or sink while it sets. Standard thin thinset shrinks too much under a big tile and leaves hollow spots.

Can you tile a shower wall with large tiles?

Yes, and it is one of my favourite looks. We waterproof the walls to ANSI A118.10 and flatten them first, then set the large tiles or porcelain slabs. Fewer grout lines means less cleaning and fewer places for water to find a way in.

What is lippage and how do you stop it?

Lippage is when one tile edge sits higher than the one next to it, so you can feel a lip between them. You stop it with a flat surface, full thinset coverage, back-buttering the tile, and leveling clips that hold neighbours at the same height while the mortar cures.

Do big tiles make a small bathroom look smaller?

Usually the opposite. Fewer grout lines make a small bathroom read as one clean surface rather than a grid, which tends to make it feel bigger. The key is planning the cuts so the big tiles land cleanly instead of leaving an odd sliver by the door.

Tiling With Large Format Tiles

Q: Can you put large tiles on a shower floor?

No. A shower floor has to slope a quarter inch per foot to the drain (ANSI A108.02), and a big rigid tile cannot follow that slope without being cut into wedges. That is why shower floors use small mosaic tile. It is a physical constraint, not a style rule.

Large format tile has a quiet magic trick: it makes a room look calm and expensive using almost no grout lines. The catch is that every one of those missing grout lines used to hide your lumps, and now nothing does. Tiling with large format tiles looks like less work because there are fewer tiles to set. It is not. The tile is the cheap part. The flat surface behind it is where the time, and the money, actually go. I am Nick, I have set tile across the DMV since 2006, and I can tell you that walls lie about being flat. A big tile is just the lie detector.

What counts as large format, and why the size changes everything

Large format is any tile with one side 15 inches or longer. That is the actual industry line, not a marketing word. A 12 by 24, a 24 by 48, a full porcelain slab: all large format, all ruled by the same bit of physics.

That rule is simple. A big rigid tile cannot bend to follow a lumpy surface. A small tile hides a wavy wall because each little piece tilts a hair and you never notice. A big tile spans the whole lump and shows it as lippage, which is just one tile edge sitting higher than its neighbour. So tiling large format tiles is really a flattening job with a bit of tiling on the end.

The flat surface is the whole job, and ANSI put a number on it

Here is the opinion I will stand on: large format tile is a substrate problem pretending to be a tile choice. People pick 24 by 48 for the look and get surprised by the price. The tile is not the expense. Making the surface flat enough that a big tile does not telegraph every hollow is the expense.

ANSI A108.5 asks for 95% mortar coverage under tile in wet areas, and 80% in dry ones, which just means how much thinset actually touches the back of the tile. You cannot hit 95% under a big tile on a wavy wall. The tile bridges the low spots, the mortar never reaches them, and you get hollow patches that crack and lippage you can feel with a bare foot. So before any big tile goes on, the surface gets made flat to a straightedge. That is the real work, and it belongs in the estimate instead of turning up as a surprise.

Large format marble-effect floor tiles laid flat across a room

Tiling with large tiles on shower walls needs porcelain slabs and a flat backer

Large tiles for shower walls are having a moment, and fairly. Fewer grout lines means less to scrub and less to fail. Porcelain slabs for shower walls take it further still, a single sheet with almost no joints at all.

The catch is the usual one. A shower wall has to be waterproof and dead flat, in that order. A big tile over a wavy, poorly bonded backer is a leak and a lippage complaint waiting to happen. We waterproof the walls to ANSI A118.10, flatten them, then set the tile. The grout lines are scarce, but the system behind them is doing all the work.

Large format white tile shower wall with a mosaic accent band

Tiling with large tiles in a small bathroom, without shrinking the room

Everyone worries a big tile will make a small room feel smaller. Usually it is the opposite. Fewer grout lines let a small bathroom read as one clean surface instead of a busy grid, so tiling with large tiles in a small bathroom often makes it feel bigger.

The trick is the layout. In a small room a big tile leaves big cuts, and a big cut in the wrong place is the first thing you see. So we dry-lay it, center the tile where your eye lands, and push the cuts to the edges. Plan it, and the room looks intentional. Skip that, and it looks like the tile got in a fight with the doorway.

Tiling a wall with large tiles: the tools that make big tile lie flat

Tiling a wall with large tiles is a team effort between the trowel and the leveling system. A big notched trowel lays deep ridges of thinset, then you flatten those ridges so the whole back of the tile makes contact and you actually reach that 95% coverage.

Leveling clips do the rest. They are little plastic spacers that clamp two tiles to the same height while the mortar cures, so no edge sits proud of its neighbour. They are insurance on top of a flat surface, not a substitute for one. And back-buttering, spreading thinset on the tile back too, is not optional on big tile either. It is the difference between full contact and a hollow that cracks in a year.

When large format tile is the wrong call

If your shower floor needs the tile, large format is the wrong tool, and I will tell you so. A shower floor slopes a quarter inch per foot toward the drain, and a big rigid tile cannot follow that slope without being cut into wedges. That is why shower floors are mosaic. It is geometry, not fashion.

And if you just want a fast, cheap refresh on a rental, a big tile over a surface that needs flattening is money in the wrong place. Sometimes the honest answer is a smaller tile, or a different fix altogether. I would rather say that than take the job and hand you lippage to look at every morning.

Thinking about tiling with large format tiles in a DMV kitchen or bath? The tile is the easy part. Getting the surface flat is where I earn my keep. See how I handle large format tile installation, surface preparation and shower waterproofing, or just get a free estimate. For the technical side, the TCNA Handbook and ANSI A108.5 set the coverage and flatness rules I build to, and Schluter makes the leveling and uncoupling systems I lean on. Worst case, I talk you out of a big tile and into a better idea, and that one is free.

Tiling With Large Format Tiles: The Wall Costs More Than the Tile