Tile flooring divides homeowners. It’s virtually indestructible, 100% waterproof, and carries a premium aesthetic that’s hard to replicate — but it’s cold underfoot, unforgiving if you drop something, and expensive to install properly. Understanding the differences between porcelain, ceramic, and natural stone tiles, and matching the right type to the right room, is the difference between a floor you’ll love for 30 years and one you’ll be regretting in five. Here’s the full picture for UK homes.
These three categories of tile differ fundamentally in composition, hardness, water absorption, and price. Getting this right is the starting point of any tile flooring decision.
| Type | Water Absorption | Hardness (Mohs) | Typical Cost (supply only) | Porosity |
|---|---|---|---|---|
| Ceramic | 3–7% | 5–6 | £8–£30/m² | Medium |
| Porcelain | less than 0.5% | 7–8 | £15–£80/m² | Very low |
| Slate | 0.1–0.5% | 2.5–4 | £20–£60/m² | Low |
| Limestone | 2–12% | 3–4 | £25–£80/m² | Medium–High |
| Travertine | 6–20% | 3–4 | £25–£75/m² | High (filled or unfilled) |
| Granite | less than 0.5% | 6–7 | £30–£100/m² | Very low |
Ceramic tiles are fired clay with a glazed surface. The glaze provides the colour and design and offers reasonable water resistance, but the underlying body is porous. This makes ceramic suitable for walls and low-moisture floors, but its glazed surface can chip or crack under heavy impact, and if the glaze is damaged in a wet area, the porous body absorbs water. For bathroom walls: excellent. For a busy kitchen floor: less ideal.
Porcelain tiles are fired at higher temperatures from a denser clay mixture. The result is a tile with very low water absorption across its entire body — not just the surface. This means porcelain is suitable for outdoor use, wet rooms, and any area where water contact is inevitable. It’s also significantly harder than ceramic, which means it’s more durable underfoot but also more difficult to cut (requiring diamond-blade wet saws and specialist skill). For most UK bathroom floors and kitchen floors, porcelain is the professional’s choice.
Natural stone is the premium category, and within it, the options vary enormously in their practical properties. Slate is dense and relatively non-porous — good for kitchens and bathrooms. Limestone and travertine are beautiful but porous and softer — they require sealing, are susceptible to acid etching (lemon juice, vinegar, limescale cleaners), and are generally higher maintenance. Granite is extremely hard and low-porosity, closer to porcelain in practical terms. Before choosing natural stone, be honest about your maintenance tolerance.
Slip resistance is a critical specification for any floor tile, especially in UK wet rooms, bathrooms, and kitchens. Tiles are rated by the Pendulum Test Value (PTV) or, for wet areas, the R-rating system (German DIN 51130 standard):
A highly polished limestone or marble floor in a bathroom can look spectacular and have a PTV of only 12 when wet — dangerously slippery. Always check the slip rating before buying tiles for any floor that might get wet. The Health and Safety Executive guidance on slip prevention sets out the standards that apply to UK properties. Tile retailers should be able to provide the PTV for any floor tile they sell.
Every type of tile is cold underfoot. This is physics: stone and ceramic are dense, have high thermal mass, and conduct heat away from your feet rapidly. In a UK bathroom on a winter morning, stepping onto unheated tile is genuinely unpleasant.
The solution most tile floors should include: electric underfloor heating. Electric UFH mats (thin heating elements laid in adhesive under the tiles) add relatively little cost to a bathroom or kitchen project — typically £80–£150/m² supply and fit including the thermostat — and transform the experience of tiled floors entirely. Tile is, in fact, one of the best floor types for UFH because its high thermal mass means it stores and radiates heat efficiently once warm. See our full guide to UFH-compatible flooring for how this works with different tile types.
Grout joints are the most maintenance-intensive aspect of tiled floors. Grout is porous and stains easily, particularly in kitchens and bathrooms. The options:
For natural stone tiles, sealing the tile itself (not just the grout) is essential for porous materials like limestone and travertine. A quality penetrating sealer applied before grouting protects the stone from staining during installation and daily use. Re-seal annually or biannually depending on traffic.
| Room | Best Tile Choice | Notes |
|---|---|---|
| Kitchen floor | Porcelain (R10 rated) | Durable, waterproof, easy to clean; pair with UFH |
| Bathroom floor | Porcelain (PTV 36+ wet) | Check slip rating carefully; avoid polished finishes |
| Wet room / shower | Porcelain (R10+) | Smaller format tiles (mosaic) for better slip resistance on gradient |
| Hallway | Porcelain or slate | High traffic: choose hard tile; slate’s natural texture aids grip |
| Living room | Porcelain (with UFH) or stone | Cold without heating; pairs well with underfloor heating |
| Bedroom | Avoid unless UFH fitted | Cold underfoot; LVT or wood better in most cases |
| Conservatory | Porcelain | Must handle temperature extremes; avoid natural stone |
Tile is the most demanding flooring type to fit correctly, and the most catastrophic when fitted badly. Tiles cracking, adhesive failing, and tiles lifting are almost always the result of inadequate substrate preparation or wrong adhesive specification — not defective tiles.
Tiles are heavy. A typical 10mm porcelain tile weighs 20–25 kg/m². Add the weight of the plywood substrate and adhesive, and an upstairs tiled floor can add significant structural load. Natural stone at 15–20mm thick can weigh 40–50 kg/m². Before tiling any upstairs room — particularly bathrooms or en-suites — a structural engineer or experienced tiler should assess whether the floor joists can take the weight. The Checkatrade directory of verified tilers includes professionals who carry out these assessments as standard practice.
| Tile Type | Supply (per m²) | Labour (per m²) | Total Fitted |
|---|---|---|---|
| Ceramic (standard) | £8–£30 | £15–£22 | £23–£52 |
| Porcelain (standard format) | £15–£50 | £18–£28 | £33–£78 |
| Large-format porcelain (600mm+) | £25–£80 | £22–£35 | £47–£115 |
| Slate | £20–£60 | £20–£30 | £40–£90 |
| Limestone | £25–£80 | £22–£35 | £47–£115 |
| Travertine | £25–£75 | £22–£35 | £47–£110 |
These figures do not include subfloor preparation (plywood overlay, levelling compound), which can add £15–£30/m² in a typical UK home. Always get quotes that specify what subfloor prep is included. For guidance on total project costs, see our detailed guide to flooring costs UK. For alternative hard flooring options that are easier to install, see our guide to the best LVT flooring and our comparison of Amtico vs Karndean — quality LVT that mimics stone with far less installation complexity. And for guidance on finding a qualified tiler, Homebuilding and Renovating’s tiling guide covers what to look for in a professional.
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