Choosing between ceramic and porcelain tiles is a common specification decision for architects, civil engineers and contractors. Both are made from clay-based materials fired in a kiln. Porcelain is a type of ceramic tile; throughout this article, “ceramic” refers to non-porcelain ceramic tiles. Their differences in water absorption, tested performance, cost and installation requirements influence where each is suitable. This guide compares these factors and explains how to specify the right tile for each application.
Ceramic vs Porcelain Tiles: The Short Answer
The main classification difference between ceramic and porcelain tiles is water absorption. Porcelain tiles absorb 0.5% or less, while non-porcelain ceramic tiles absorb more. Ceramic is often an economical choice for interior walls and suitable residential floors. Porcelain is commonly chosen for heavily used floors, wet areas and outdoor applications, provided the specific product is rated for those conditions. Check wear resistance, breaking strength, slip resistance and frost suitability rather than relying on the tile name alone.
Ceramic vs Porcelain Tiles: Side-by-Side Comparison
In this table, “ceramic” means non-porcelain ceramic tiles. Cost and installation differences are typical rather than universal.
| Property | Ceramic tiles | Porcelain tiles |
|---|---|---|
| Material and manufacture | Clay-based materials shaped and fired in a kiln; composition and firing conditions vary. | Clay-based materials processed and fired to produce a low-absorption body. |
| Water absorption | More than 0.5%; varies by product classification. | 0.5% or less. |
| Strength and durability | Suitable products can perform well on walls and floors; check tested strength and intended use. | Often selected for demanding applications; check tested strength and intended use. |
| Surface wear resistance | Depends on the glaze or exposed surface and its tested abrasion resistance. | Depends on the glaze or exposed surface and its tested abrasion resistance. |
| Stain resistance | Depends on glazing, surface finish and product performance. | Low body absorption limits moisture uptake, but surface staining still depends on finish and product performance. |
| Slip resistance | Depends on surface characteristics and tested suitability for the location. | Depends on surface characteristics and tested suitability for the location. |
| Frost resistance | Do not assume suitability; confirm frost resistance where freezing is expected. | Low absorption is beneficial, but confirm frost resistance where freezing is expected. |
| Colour and chips | Chips in glazed tiles may expose a contrasting body colour. | Glazed tiles may also show contrasting chips; matching-body or through-body products can make damage less noticeable. |
| Cutting and drilling | Generally easier to cut and drill. | Generally harder to cut and drill; suitable blades and drill bits are needed. |
| Material cost | Often lower, although premium products can be expensive. | Often higher, with substantial variation by size, finish and brand. |
| Installation cost | Often lower for comparable sizes and layouts. | May be higher because of cutting, handling and installation requirements. |
What the Differences Mean in Practice
Water absorption
Water absorption is the principal classification distinction between non-porcelain ceramic and porcelain tiles. Porcelain has a water absorption rate of 0.5% or less. ASTM C373 provides a method for measuring absorption, while product standards such as ANSI A137.1 and ISO 13006 establish relevant definitions and classifications.
Low absorption limits moisture uptake into the tile body, but it does not automatically guarantee stain resistance, slip resistance or suitability for freezing conditions. Stain resistance also depends on the glaze, surface finish and tested product performance. For wet or outdoor applications, confirm the manufacturer’s declared suitability and specify the appropriate waterproofing, drainage and installation system.
Strength and wear
Strength and surface wear resistance are different properties. A tile’s ability to resist breaking depends on its material properties, thickness, dimensions and support after installation. Surface abrasion resistance depends on the exposed surface or glaze. A porcelain body therefore does not automatically mean that its decorative surface will resist wear better than every ceramic tile.
For floors, check the manufacturer’s declared breaking strength, abrasion classification and intended use. Where a PEI rating is provided, it describes the abrasion resistance of the glazed surface, rather than the tile’s overall strength or slip resistance. Select a product suited to the expected traffic and loading.
Slip resistance
Ceramic and porcelain tiles are not automatically slip resistant. Surface finish and glaze matter more than body type, and polished or high-gloss finishes of either type can be slippery when wet. In North America, ANSI A326.3 dynamic coefficient of friction (DCOF) testing is the common reference, and many specifications set a minimum DCOF for level interior wet areas. Confirm the value that applies in your jurisdiction and project specification.
Frost and exterior use
For exterior work, the choice between ceramic vs porcelain tiles often comes down to frost resistance. Water absorbed by a porous tile can freeze and crack it. Porcelain with a low absorption rating is the safer choice for balconies, terraces, entrances and cold-climate exteriors. Always check that the product is declared suitable for exterior or freeze-thaw use, because low absorption alone does not certify the whole assembly.
Installation Considerations
Installation also differs for ceramic vs porcelain tiles, mainly in adhesive choice, substrate preparation and cutting.
Adhesives and mortars
Select an adhesive or mortar approved for the tile’s absorption, size and weight, as well as the substrate and service conditions. Porcelain commonly requires a polymer-modified cementitious adhesive or another product specifically approved for low-absorption tiles. Follow the requirements of the complete installation system, including any waterproofing or uncoupling membrane.
ANSI A118.4 and ANSI A118.15 cover modified and improved modified dry-set cement mortars respectively. Compliance with ANSI A118.15 alone does not establish suitability for every large-format installation. Confirm the manufacturer’s approval for the application, observe the specified bed thickness and achieve the required coverage, using back-buttering where necessary.
Substrate and deflection
Large-format porcelain is stiff and unforgiving of a substrate that is out of plane or too flexible. Most floor tile is fixed to a concrete slab or screed, so slab flatness, curing and cracking all matter. Our guide to concrete technology explains how to control these factors, and our guide to masonry in construction covers wall backgrounds. Check flatness tolerances and floor deflection limits against the applicable standard (in the US, the TCNA Handbook) and the tile manufacturer’s requirements before installation, not after cracks appear.
Movement joints
Ceramic and porcelain tiles both need movement joints at perimeters, changes of plane, over structural joints and at intervals in large fields. Exterior and sun-exposed areas need closer spacing. Do not bridge structural movement joints with rigid grout or mortar.
Cutting and site productivity
Porcelain cuts more slowly and wears blades faster, so allow for this in labour and equipment costs. Plan for wet saws, suitable blades and dust control. Tile dust can contain silica, so cut wet or use dust extraction, and provide respiratory protection under local occupational safety rules.
Where to Use Ceramic and Porcelain
| Application | Typical choice | Notes |
|---|---|---|
| Interior walls, backsplashes | Ceramic | Lower cost and easier cutting; low impact loads |
| Low-traffic residential floors | Ceramic or porcelain | Check wear rating for glazed ceramic |
| Kitchens, entryways, corridors | Porcelain | Higher traffic, staining and abrasion |
| Showers and wet rooms | Porcelain preferred | Waterproofing system is critical; verify slip rating |
| Commercial and public floors | Porcelain | Specify tested wear, DCOF and breaking strength |
| Exterior floors, cold climates | Porcelain | Must be declared suitable for freeze-thaw exposure |
Specification Checklist
- Identify the applicable product standard, such as ANSI A137.1 or ISO 13006, and the required water absorption classification.
- Specify breaking strength, abrasion resistance and slip performance appropriate to the location.
- Confirm the surface finish and body colour where the visibility of chips matters.
- Require declared suitability for outdoor applications, and frost resistance where freezing exposure is expected.
- Specify an adhesive or mortar approved for the tile, substrate, location and installation system.
- For large-format tiles, confirm the mortar manufacturer’s approval for the tile size, weight and required bed thickness.
- State adhesive coverage requirements and how coverage will be checked during installation.
- Define substrate preparation, flatness, allowable deflection and movement-joint requirements.
- Specify waterproofing, falls and drainage where required.
- Check shade, calibre and batch consistency, and require a sample installation where appearance is critical.
- Allow for cutting waste and retain replacement tiles from the same batch.
The Bottom Line: Ceramic or Porcelain?
Choose tiles according to the demands of the location. Porcelain is generally preferable for wet, heavily used and outdoor areas, provided it is rated for those conditions. Ceramic remains an economical choice for walls and light-duty indoor floors. Check absorption, wear resistance, slip resistance and frost suitability, and use appropriate adhesives and movement joints.
Frequently Asked Questions
Q: What is the main difference between ceramic vs porcelain tiles?
Answer: The main distinction is water absorption. Porcelain is a type of ceramic tile with an absorption rate of 0.5% or less, while non-porcelain ceramic tiles absorb more. This low absorption limits moisture uptake, but durability, stain resistance and suitability for a particular location also depend on the tile’s surface finish, tested performance and installation.
Q: Is porcelain better than ceramic for bathrooms?
Answer: Porcelain is usually preferred for bathroom floors and showers because of its low absorption and durability. Ceramic works well on bathroom walls. In both cases, the waterproofing system and slip rating matter as much as the tile.
Q: Why is porcelain harder to install?
Answer: It is harder to cut and drill, and its low absorption needs a polymer-modified adhesive with full coverage. Large-format porcelain also needs a flat, stiff substrate.
Q: Can ceramic tiles be used outdoors?
Answer: Only if the product is declared suitable for exterior use, and frost-resistant where freezing occurs. In cold climates, porcelain is the safer default.
References & Standards
- ASTM International. (2018). ASTM C373-18: Standard test method for determination of water absorption and associated properties by vacuum method for pressed ceramic tiles and glass tiles and boil method for extruded ceramic tiles and non-tile fired ceramic whiteware products.
https://www.astm.org - ASTM International. (2018). ASTM C1026-13: Standard test method for measuring the resistance of ceramic and glass tile to freeze-thaw cycling.
https://www.astm.org - ASTM International. (2019). ASTM C1027-19: Standard test method for determining visible abrasion resistance of glazed ceramic tile.
https://www.astm.org - International Organisation for Standardisation. (2018). ISO 13006:2018: Ceramic tiles—Definitions, classification, characteristics and marking.
https://www.iso.org - Tile Council of North America. (2022). ANSI A137.1-2022: American National Standard specifications for ceramic tile.
https://www.tcnatile.com - Tile Council of North America. (n.d.). ANSI A326.3: American National Standard test method for measuring dynamic coefficient of friction of hard surface flooring materials.
https://www.tcnatile.com - Tile Council of North America. (n.d.). ANSI A118.4: American National Standard specifications for modified dry-set cementitious mortar.
https://www.tcnatile.com - Tile Council of North America. (n.d.). ANSI A118.15: American National Standard specifications for improved modified dry-set cementitious mortar.
https://www.tcnatile.com - Tile Council of North America. (n.d.). TCNA handbook for ceramic, glass, and stone tile installation.
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