Large format tile has become the default look for modern bathrooms: big porcelain on the floor, tall panels of tile in the shower, and as few grout lines as possible. It works well in bathrooms, but not everywhere in the bathroom the same way. A wall, a flat floor and a shower floor sloped to a drain each have different limits. This guide covers how to choose and plan large format bathroom tiles and large format shower tiles: where they fit, what size to pick for a small room, how to lay out a shower and what grout lines to use. For the installation steps themselves, see large format tile installation. For the wider design picture, including matte finishes and wood-look planks, see 2026 tile trends for Tampa homes.
Is large format tile good for bathrooms?
Yes. Large format tile suits bathroom floors and walls because it gives a calm surface with fewer grout lines to clean. It asks more of the installation: a flatter substrate, fuller mortar coverage in wet areas and careful lippage control. Shower floors sloped to a drain are the one place it needs special planning.
Fewer grout lines mean less grout to scrub and seal, which many homeowners want in a bathroom. The trade-off is precision. Large format tile, generally tile with an edge over about 15 inches, needs the stricter TCNA flatness tolerance described in LATICRETE TDS 164, and TileLetter notes that wet areas require 95% mortar coverage on the tile rather than the 80% minimum used in most dry areas. If you are new to the category, start with what is large format tile.
Where does large format tile work in a bathroom?
Large format tile works best on bathroom walls, shower walls and flat bathroom floors. On a shower floor sloped to a center drain it is harder, because a flat tile cannot follow a surface that slopes in several directions. Many designs pair large wall tile with smaller tile on the shower floor.
| Surface | Large format fit | What to plan for |
|---|---|---|
| Bathroom floor (flat) | Good | Floor flatness, slip resistance of the tile, door threshold height |
| Bathroom walls | Very good | Wall flatness, mortar rated for the tile, balanced cuts |
| Shower walls | Very good | Waterproofing, 95% coverage, niche and valve layout |
| Shower floor, center drain | Limited | Multi-direction slope causes lippage; smaller tile is easier |
| Shower floor, linear drain | Better | Single-direction slope lets larger tile lie flatter |
The shower floor limit is in the standard itself. LATICRETE TDS 164 notes that the ANSI lippage chart does not apply to floors sloping to drains, that lippage will be present with tiles 6×6 and larger on surfaces sloped to drains, and that smaller units reduce lippage in sloping areas.
Can you use large format tile in a small bathroom?
Yes. Large format tile is common in small bathrooms, because fewer grout lines keep a small floor or wall from looking busy. The practical limit is cuts: in a very small room, a tile larger than the floor’s shorter dimension leaves mostly cut pieces, so choose a size that gives balanced cuts.
Dry-lay or draw the layout before ordering. Check where the toilet flange, the door and the vanity fall, and aim for cuts at least half a tile wide at the edges. In a narrow bathroom, 12×24 tile running the long way of the room is a common compromise between a large-format look and manageable cuts. Our guide to grout line size for 12×24 tile covers joints for that size.
Large format tile on shower walls
Large format shower wall tile looks best when the layout is planned around the fixed points: the valve, the shower head, the niche and the corners. Center the layout on the main wall, land niche edges on grout lines, and use leveling clips on every joint because shower walls are seen in side light.
A vertical stacked layout, with tiles standing upright in straight columns, is a common large format shower layout; it avoids the warpage problem of long tiles in an offset and makes a low ceiling feel taller. Horizontal layouts work too, with the offset kept to a third of the tile length for long tile, as ANSI A108.02 section 4.3.8.2 calls for when the offset side is over 18 inches. Start from a level support at the bottom so the first row is true. For wall setting tips, read using a tile leveling system on walls and showers.
Large format tile on a shower floor
Large tile on a shower floor works best with a linear drain, which lets the floor slope in one direction like a single tilted plane. With a center drain, the floor slopes from four sides, and large tiles must be cut along the slope lines or swapped for smaller tile to keep lippage down.
Many bathrooms use the same tile on the bathroom floor and the shower walls, with a smaller mosaic or a cut-down version of the same tile on the shower floor. That keeps the look continuous while respecting the slope. Whatever you choose, follow the waterproofing system’s instructions for the drain and the pan; our glossary entry for shower pan explains the term.
What grout line size for a bathroom and shower?
For rectified large format porcelain in a bathroom or shower, a 1/8 inch grout line is a common choice: narrow but visible, easy to fill and keep clean. Tiles over 18 inches in a running bond need at least 1/8 inch on average if rectified and 3/16 inch if calibrated, under ANSI A108.02.
Pick grout for the joint width and for a wet area. LATICRETE notes that its epoxy grouts do not require a sealer, while cement grouts are typically sealed after they cure. Use flexible sealant, not grout, at the inside corners and where the wall meets the floor or tub. Step-by-step grouting is in how to grout tile, and joint sizes by tile are on the grout joint size chart.
Why lippage shows more in bathrooms
Bathrooms concentrate the conditions that expose lippage: vanity lights and windows that skim across walls, wet surfaces that reflect light, and narrow joints on large tile. A raised edge on a shower wall also catches water and soap residue.
A leveling system holds neighboring edges in the same plane while the mortar cures. The Next Level tile leveling system uses clips in 1/32, 1/16 and 1/8 inch with reusable wedges, designed for ceramic and porcelain tile. See what is tile lippage for how it is measured.
Frequently asked questions
Is large format tile slippery in a bathroom?
Slip resistance depends on the tile’s surface and rating, not its size. Choose a floor tile the maker rates for wet interior floors.
What size tile is best for a shower floor?
Smaller tile follows a center-drain slope more easily. Larger tile works better with a linear drain and a single-direction slope.
Do large format shower tiles need special mortar?
Use a mortar rated for large format tile and for wet areas, and aim for 95% coverage, as TileLetter notes for wet areas.
Key terms
- Large format bathroom tile: tile with an edge over about 15 inches used on bathroom floors or walls.
- Large format shower tile: large tile installed on shower walls or, with planning, shower floors.
- Linear drain: a long, narrow shower drain that lets the floor slope in one direction.
- Center drain: a round or square drain in the middle of the shower, with the floor sloping in from all sides.
- Wet area coverage: the 95% mortar contact under tile called for in showers and other wet areas.
- Balanced cuts: a layout where the cut tiles at opposite edges are the same width.
- Sloped to drain: a floor built with a fall toward the drain, where standard lippage limits do not apply.
Sources
- LATICRETE TDS 164, Lippage: Causes and Prevention (floors sloped to drains, ANSI A108.02 4.3.8.1 and 4.3.8.2)
- TileLetter (NTCA), Large-format tile: know your numbers for installation success (80% and 95% mortar coverage)
- LATICRETE, cement grout FAQ (sealing, epoxy grout, flexible sealant)
Planning a large format bathroom? Next Level clips keep big tile flush on floors and shower walls, and the wedges are reusable job after job. The Next Level tile leveling system ships nationwide by quote. Request a quote for your bathroom tile job.