Porcelain is a type of ceramic tile. Under the tile standard, it has water absorption of 0.5% or less, measured with ASTM C373; other ceramic tiles cover a wider range. That makes the label useful, but it does not by itself approve a tile for a shower, outdoor freeze-thaw exposure or a particular floor. Match the exact product's area-of-use and surface information to the room, then compare format, finish, installation needs and the complete installed quote.
Porcelain is a category of ceramic tile, not a separate material family. The useful buying distinction is the tile’s tested water absorption and the manufacturer’s approved use for that specific product.
The standards distinction
The Tile Council of North America describes porcelain as tile with water absorption of 0.5% or less under ASTM C373. Non-porcelain ceramic tile has absorption above that threshold, but the category includes a range of products and finishes. A label alone does not tell you whether a tile is right for every wet or outdoor location.
| Check | Porcelain | Other ceramic tile |
|---|---|---|
| Water absorption | 0.5% or less under the definition | Above 0.5%, with a broad range of properties |
| Product use | Verify the product’s stated area of use | Verify the product’s stated area of use |
| Cutting and bonding | Generally harder to cut and bond, according to TCNA | Often easier to cut and bond, but product and format matter |
| Surface | Glazed or unglazed options | Glazed and some unglazed options |
Choose for the installation
- For a shower or bathroom floor: check the manufacturer’s area-of-use documentation, surface finish and slip information for the exact tile. Plan the full waterproofing and setting system, not only the tile face.
- For an exterior floor: verify freeze-thaw suitability and exterior approval. TCNA cautions that porcelain is usually, but not always, frost resistant, and that some non-porcelain products can also be used outdoors.
- For walls and backsplashes: compare size, edge, glaze, pattern repeat and cleaning requirements. Larger or heavier pieces may change the substrate and installation plan.
- For a busy interior floor: compare the surface’s wear and maintenance guidance, grout layout and replacement availability. A porcelain classification does not describe every surface performance characteristic.
Get comparable quotes
Ask the installer to identify the tile and setting materials by manufacturer and model, confirm the substrate and flatness requirements, include grout and movement joints, and state who handles waterproofing where needed. Porcelain may need different cutting equipment and bonding materials; confirm that before comparing labor bids. For another flooring tradeoff, see LVP, laminate and engineered hardwood compared.
The category name is not a substitute for the technical sheet. Read TCNA’s porcelain tile definition and use notes and Porcelain Tile Certification information; verify each candidate tile’s own specification sheet and installation instructions.
For a shower or major flooring project, use the remodeling contractor checklist. Browse flooring and bathroom remodels.
Once the tile is chosen, compare cement, premixed and epoxy grout against the tile surface, joint width and installation conditions.
Common questions
Is porcelain tile different from ceramic tile?
Porcelain is ceramic tile that meets the standard water-absorption threshold of 0.5% or less. Ceramic tile is the broader family.
Is porcelain always suitable outdoors?
No. TCNA says some non-porcelain tiles are also suitable outside and porcelain is not automatically frost resistant. Check the exact product's area-of-use and freeze-thaw documentation.
Is porcelain harder to install?
TCNA notes porcelain is generally harder to cut and bond than non-porcelain tile. Ask the installer to confirm tools, setting materials and substrate requirements for the selected product.
Which tile should I use in a shower?
Choose a product specifically documented for the intended shower surface and use. Check the surface, dimensions, slip information, installation system and waterproofing details rather than relying on the porcelain label alone.