Porcelain slab — sold under names like sintered stone, ultra-compact surface, Dekton and Neolith — is fired clay, feldspar, silica and mineral oxides fused under extreme heat and pressure. No resin binds it together, which is the single fact that explains everything else about how it behaves.
The facts
| Type | Fired ceramic. Raw minerals — glass, quartz, feldspars and metal oxides for color — sintered under heat and pressure until the particles fuse without fully melting. |
|---|---|
| Composition | Zero polymer resin. This is the key difference from engineered quartz, which is 7–10% resin by weight. |
| Porosity | Near zero, typically under 0.1%. Nothing soaks in. No sealing, ever. |
| Hardness | Roughly 7–8 on the Mohs scale — among the hardest surfaces available for a counter. |
| Heat | Tolerates roughly 1800°F and above. There is no resin to soften, so a pan straight off the burner does nothing to it. |
| UV | Completely stable. Color does not fade or yellow in sunlight, which makes it the material of choice for outdoor kitchens. |
| Thickness | 12mm is the usual countertop thickness. The full range runs from 4mm up to 30mm; 20mm is common where a heavier edge is wanted. |
Where it shines
- Outdoor kitchens and covered patios, where UV would destroy quartz
- Anyone who genuinely will set a hot pan down without thinking
- Large islands, where slab sizes up to roughly 126″ × 63″ can avoid a seam entirely
- Full-height splashes and waterfall ends, where thin material keeps the proportions right
- Anyone who wants a stone look with no maintenance whatsoever
Where it needs care
- Edges and corners chip if struck hard — the material is very hard, and hard means brittle
- Surface-printed patterns can show a different color at the cut edge
- Fabrication is unforgiving, so the shop doing the work matters more than with any other material
What porcelain is genuinely better at
Every countertop material has a marketing claim and a real-world answer. Here is porcelain’s, honestly.
Heat. Not “resistant” — indifferent. Fired ceramic sits above 1800°F. Compare that with engineered quartz, whose resin binder starts to soften from around 150°F. If the trivet rule is the thing that puts you off quartz, this is the material that removes it.
Sunlight. Porcelain is the only surface on this list we will put outdoors without hesitation. Quartz yellows under UV. Porcelain does not move.
Stains. With porosity under 0.1 percent there is nowhere for wine, oil or turmeric to go. It does not need sealing because there is nothing to seal.
Scratches. At Mohs 7–8 it will outlast a knife blade. Cut on a board anyway — not for the counter’s sake, for the knife’s.
The pattern question, and why edges matter
Ask whether the pattern goes through the body
Some porcelain slabs carry their veining only in a printed surface layer. Others run it through the full thickness. It makes no difference on the face — it makes all the difference at a cut edge.
On a surface-printed slab, an exposed edge shows the body color underneath rather than the vein pattern on top. There is a straightforward fix, and it is the reason mitered edges are so common on porcelain: we cut two pieces at 45 degrees and join them, so the face pattern wraps around the corner and the edge reads continuous.
A mitered edge is more work than a simple eased edge, and it should be priced as such. What it should never be is a surprise. We will tell you at template stage which slab you are looking at and what the edge will do.
Care and cleaning
Warm water and mild soap. That is the whole routine. Because there is no resin and no pore structure, porcelain tolerates cleaners that would ruin other surfaces — but there is no reason to reach for them.
- No sealing. Ever. Same as quartz.
- Acids are fine. Lemon juice and vinegar do nothing here, unlike on marble.
- Avoid abrasive pads on a polished finish. The surface will not scratch easily, but a polished sheen can be dulled.
- Protect the edges. The face is nearly indestructible. A hard knock on a corner is the one failure mode worth thinking about.
How we fabricate it
This is where porcelain separates good shops from optimistic ones. The material’s hardness cuts both ways: it resists everything in your kitchen, and it resists the tools in ours.
A standard segmented granite blade will cause severe chip-out on a porcelain slab. The work needs continuous-rim or fine-segment diamond tooling, a shallow scoring pass of a millimeter or two along the show face before any full-depth cut, and constant water cooling to prevent thermal cracking. Sink cutouts need a minimum corner radius of about three quarters of an inch — a tight square corner is where a slab cracks, either in the shop or six months into use.
Our BACA Robo SawJet handles porcelain the way it handles everything else: waterjet, digitally templated, cut once. It is the same reason we can quote porcelain confidently when shops without the right equipment quote around it.
Finishes and slab sizes
Porcelain comes in genuinely large formats — commonly 120cm × 240cm, with the largest running to roughly 160cm × 320cm, which is about 63″ × 126″. On a big island that can be the difference between one piece and two.
Finishes
| Polished | Reflective and deep-colored. The most stone-like of the finishes and the easiest to keep clean. |
|---|---|
| Matte / natural | The most common choice. Understated, hides fingerprints, reads as honed stone. |
| Textured | A tactile surface with real grip. Popular outdoors and on full-height splashes. |
Thickness affects the look as much as the finish does. A 12mm top with a mitered edge reads thin and modern; 20mm reads more like traditional stone. Worth deciding early, because it changes the fabrication.