Bathroom Tile FAQs

1. What is the difference between porcelain and ceramic tile?

Both porcelain and ceramic tile are excellent choices for bathrooms, but porcelain is denser, less porous, and generally more durable. Because it absorbs less moisture, porcelain is especially well suited for shower walls, shower floors, and high-traffic bathroom floors. Ceramic tile is often easier to cut, slightly more affordable, and works well for walls and decorative applications. Your contractor can help determine which material best fits your project and budget.

 

2. What size tile is best for a bathroom?

The ideal tile size depends on the size of the bathroom and the overall design you're trying to achieve. Large-format tile, such as 12×24-inch or larger, is popular because it creates fewer grout lines and can make a bathroom feel more spacious. Smaller mosaic tile is commonly used on shower floors because the additional grout joints provide better traction and allow the tile to conform more easily to the floor's slope toward the drain.

 

3. Is porcelain tile slippery when it gets wet?

Not necessarily. Slip resistance depends more on the tile's surface finish than the material itself. Matte, textured, and slip-resistant porcelain tiles are excellent choices for bathroom floors because they provide better traction when wet. Highly polished tile may become more slippery in wet areas. Your contractor can recommend products designed specifically for bathroom floors and shower applications where safety is especially important.

 

4. What grout color should I choose?

Grout color can dramatically influence the finished appearance of your bathroom. Matching grout creates a more continuous look by blending with the tile, while contrasting grout highlights the tile pattern and adds visual definition. Medium-gray grout is a popular choice because it coordinates with many tile colors and tends to hide everyday dirt better than bright white grout. Your contractor can help you compare samples under your bathroom's lighting before making a final decision.

 

5. Does natural stone require more maintenance than porcelain tile?

Yes. Natural stone materials such as marble, travertine, and slate typically require periodic sealing and specialized cleaning products to help preserve their appearance. Porcelain tile generally requires less maintenance because it is highly resistant to moisture, staining, and everyday wear. Homeowners who prefer a low-maintenance bathroom often choose porcelain products that realistically imitate the appearance of natural stone.

 

6. How do I keep my bathroom tile looking new?

Regular cleaning with manufacturer-recommended products, wiping down shower walls after use, and maintaining good bathroom ventilation can help keep tile looking its best. Periodically inspect grout and caulking for signs of wear and repair them promptly to prevent moisture from reaching the underlying structure. Avoid abrasive cleaners or harsh chemicals that could damage tile finishes or grout over time.

 

7. Is quality tile installation as important as the tile itself?

Absolutely. Even the highest-quality tile can perform poorly if it isn't installed correctly. Proper waterproofing, substrate preparation, layout planning, grout installation, and movement joints all contribute to the durability and appearance of the finished project. An experienced bathroom remodeling contractor follows industry best practices to help ensure your tile installation remains beautiful, watertight, and long-lasting for many years.

8. How do I choose the right tile pattern for my bathroom?

Choose a tile pattern based on the bathroom’s size, architecture, design style, tile dimensions, and the visual effect you want to create.

Common patterns include straight-set, running bond, stacked, herringbone, basketweave, and more decorative layouts. The pattern can influence how large or visually complex the room appears.

In a small bathroom, a simpler pattern may create a cleaner appearance, while a decorative pattern can establish a focal point in a shower or on an accent wall.

The pattern should also be considered alongside grout color, tile size, fixtures, cabinetry, and the overall material palette.

9. Should bathroom floor and wall tile match?

Bathroom floor and wall tile do not have to match; coordinated materials can create a more layered and intentional design.

Using the same tile throughout can provide visual continuity and make a small bathroom feel more cohesive. Using different tiles can introduce contrast, texture, pattern, or a distinct focal point.

For example, a neutral large-format floor tile can be paired with decorative shower tile, or a marble-look wall tile can be combined with a complementary mosaic floor.

The materials should relate through color, texture, scale, or finish rather than necessarily being identical.

10. How much extra tile should I buy for a bathroom remodel?

Homeowners should generally purchase approximately 10% to 15% more tile than the measured installation area to account for cuts, breakage, and future repairs.

More tile may be necessary for complex patterns, diagonal layouts, herringbone installations, irregular rooms, or materials that require careful pattern matching.

It is also important to purchase enough tile from the same production lot when possible because color and shade can vary between manufacturing batches.

Keeping leftover tile after construction can be valuable if a tile is discontinued or damaged in the future. Learn more about types of tile, waterproofing and the different uses in Custom Tile Installation or use our Bathroom Tile Buyers Guide in our Downloadable Resources to keep track of products, costs, thoughts, ideas and general notes.

11. Does custom tile installation require waterproofing?

Waterproofing is essential in shower and other continuously wet areas, but tile itself is not a waterproofing system.

Water can migrate through grout joints and other portions of a tile assembly. A properly designed shower therefore requires an appropriate waterproofing system beneath or behind the finished tile.

Waterproofing should address areas such as shower walls, floors, corners, seams, niches, benches, penetrations, and drains as appropriate for the construction system.

The waterproofing system and tile installation should be planned together rather than treating waterproofing as an afterthought. You can find more information in our Bathroom Waterproofing FAQs page

12. Can tile be installed over existing tile?

Sometimes, tile can be installed over existing tile, but the existing surface must first be evaluated for stability, condition, levelness, and compatibility.

Installing over existing tile can potentially reduce demolition, but it is not appropriate when the existing tile is loose, damaged, uneven, poorly bonded, or concealing underlying problems.

Adding another layer also increases the finished floor or wall thickness, which can affect doors, transitions, plumbing fixtures, drains, and other components.

Removing existing tile may provide a better opportunity to inspect the substrate and correct problems before installing the new surface.

13. What is a tile substrate?

A tile substrate is the stable surface or backing material that supports the tile installation.

Depending on the application, the substrate may include a suitable underlayment, cement-based backer board, mortar bed, concrete, or another approved system.

The substrate needs to be appropriate for the specific tile installation and properly prepared. It may need to be flat, structurally sound, clean, and properly waterproofed where required.

A quality tile installation depends heavily on what exists beneath the tile, which is why substrate preparation is an important part of the remodeling process.

14. How flat does a floor need to be before installing tile?

A tile substrate needs to be sufficiently flat and stable for the selected tile and installation method, with large-format tile generally requiring particularly careful preparation.

Uneven surfaces can make it difficult to properly set large tiles and can create lippage, uneven joints, or other installation problems.

The existing floor may need leveling, patching, grinding, or other preparation before tile installation begins.

In shower areas, the floor has an additional requirement: it must provide the appropriate slope toward the drain while maintaining a suitable surface for the selected tile.

15. What is tile lippage?

Tile lippage is the difference in height between adjacent tile edges, creating a surface that is not completely flush.

Some variation can result from tile manufacturing tolerances, substrate conditions, tile warpage, installation methods, and the selected tile format.

Large-format tile requires particularly careful substrate preparation and installation because even relatively small variations can become more noticeable.

Proper layout, leveling techniques, substrate preparation, and installation practices can help minimize excessive lippage.

16. Should I use matching grout with my tile?

Matching grout creates a more continuous appearance, while contrasting grout emphasizes the individual shape and pattern of the tile.

A grout color similar to the tile can make the surface appear more uniform and can reduce visual interruption, which may be useful in a small bathroom.

Contrasting grout can highlight geometric shapes, decorative patterns, subway tile, mosaics, or other distinctive layouts.

Grout should also be selected with maintenance in mind because lighter colors may make staining and discoloration more noticeable.

17. What type of grout is best for bathroom tile?

The best grout depends on the tile, location, joint size, moisture exposure, maintenance requirements, and installation system.

Cementitious and high-performance cement grouts are common choices for many bathroom applications, while epoxy grout can provide greater stain and chemical resistance in appropriate installations.

The selected grout must be compatible with the tile and installation conditions. Shower floors, walls, floors, and other applications may have different requirements.

Homeowners should also consider appearance and maintenance because grout can represent a significant portion of the visible finished surface.

18. Can custom tile be used to create a curbless shower?

Yes, custom tile can be used to create a curbless shower, provided the floor structure, drainage, slope, waterproofing, and tile installation are properly coordinated.

A curbless shower requires the shower floor to transition with little or no raised threshold. Water must still be directed toward the drain while preventing it from spreading into the rest of the bathroom.

The tile size and layout should accommodate the required slope. Smaller mosaics may provide greater flexibility on sloped shower floors.

The feasibility of a curbless shower should be determined before construction because the floor structure and drain configuration can affect the entire bathroom design.

19. Can custom tile be used on bathroom ceilings?

Yes, tile can be installed on certain bathroom ceilings, particularly in showers, but the substrate, weight, moisture exposure, and installation system must be carefully considered.

Ceiling tile can create a dramatic, continuous appearance in a shower and can coordinate with the surrounding walls.

The installation must account for the weight of the selected material and the ability of the ceiling assembly to support it. Proper adhesive or mortar, substrate preparation, waterproofing where appropriate, and installation techniques are essential.

Large or heavy materials may require additional consideration before installation.

20. How do I maintain natural stone bathroom tile?

Natural stone generally requires more maintenance than many porcelain and ceramic tiles, including appropriate cleaning and, for some stones, periodic sealing.

Marble, limestone, travertine, slate, and other stones have different characteristics and maintenance requirements.

Harsh or acidic cleaning products can damage certain natural stones. Homeowners should use cleaning products specifically appropriate for the selected material.

The frequency of sealing depends on the stone, finish, application, product specifications, and amount of use. Maintenance requirements should be understood before selecting natural stone for the bathroom.

21. Can custom tile installation repair an uneven or damaged bathroom?

Custom tile installation can address some surface irregularities, but significant structural or substrate problems should be corrected before tile is installed.

Tile should not be used simply to conceal a damaged or unstable floor or wall. Problems involving water damage, deteriorated subflooring, structural movement, or inadequate support need to be evaluated and addressed first.

Proper preparation may involve repairing the substrate, leveling surfaces, replacing damaged materials, or installing an appropriate underlayment or backer system.

Correcting underlying problems provides a more reliable foundation for the finished tile installation.

22. How should tile be coordinated with bathroom fixtures?

Tile should be planned alongside plumbing fixtures, cabinetry, glass, lighting, and other finishes so the finished bathroom looks intentional and installation conflicts are minimized.

Tile layout can affect the location of shower controls, niches, drains, grab bars, towel bars, mirrors, outlets, and other components.

A carefully planned layout can center tile patterns, minimize awkward cuts, align grout joints with architectural elements, and create visual continuity.

This is particularly important with custom tile patterns, specialty materials, large-format tile, and bathrooms containing multiple design features. Planning the tile layout before construction begins helps ensure that the finished installation supports both the design and the function of the bathroom.