Cutting porcelain tiles
Updated: October 2026
You bought porcelain because the box said it would take a bathroom floor, and the cutter box said porcelain too, and the first offcut still chipped. Cutting porcelain tiles on a rail only counts if the tile sits inside that cutter’s length and thickness and the first offcuts snap clean. The word on the listing is a claim, not a result. The [tile cutting machine comparison](/hub/cutting-tools/tile-cutting-machine) holds the spec table. This page is the material limit. The rail-versus-saw structure stays on [manual tile cutter or wet saw](/hub/cutting-tools/tile-cutting-machine/sub/tile-cutting-machine-manual-or-electric). The full sequence stays on [how to use a tile cutter](/hub/cutting-tools/tile-cutting-machine/sub/tile-cutting-machine-how-to-use). A qualifying purchase can earn a commission at no extra cost to you. Peter F., DIY & tools editor, 19 October 2026.
You bought porcelain because the box said it would take a bathroom floor, and the cutter box said porcelain too, and the first offcut still chipped.
You bought porcelain because the box said it would take a bathroom floor, and the cutter box said porcelain too, and the first offcut still chipped. Cutting porcelain tiles on a rail only counts if the tile sits inside that cutter’s length and thickness and the first offcuts snap clean. The word on the listing is a claim, not a result. The tile cutting machine comparison holds the spec table. This page is the material limit. The rail-versus-saw structure stays on manual tile cutter or wet saw. The full sequence stays on how to use a tile cutter. A qualifying purchase can earn a commission at no extra cost to you. Peter F., DIY & tools editor, 19 October 2026.
Our top picks
| Badge | Product | Stated thickness | Wheel or blade | Materials claimed | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  Vitrex Vitrex Torque Master wet tile saw | Not stated | 110 mm continuous rim | Tile; porcelain mixed in reviews | 8.7 | about £59.95 | View offer |
| Alternative |  ROJOO ROJOO 600 mm manual tile cutter | 6–15 mm | Not stated | Ceramic, porcelain | 7.9 | about £109.00 | View offer |
| Alternative |  TILER TILER 1200 mm manual tile cutter | 16 mm | 22 mm, replaceable | Ceramic, porcelain, marble | 6.8 | about £225.00 | View offer |
On this page
Why porcelain fights a score
Porcelain is denser than the ceramic wall tile most rails were sold for. The glaze still takes a score. The body underneath does not always want to part on that line. A ceramic metro tile will often snap after one pass on a 430 mm rail. A porcelain floor tile of the same width can chip, wander, or refuse to break, even when the listing repeats the word porcelain. That is why a 5.0 from four BLOSTM reviews does not prove porcelain. Those four texts are first impressions on a 430 mm rail that also claims glazed ceramic. A MasterWorks review on the same length already reports tiles that broke at 10 mm, inside a 12 mm claim. The material is not a personality. It is density, thickness, and texture against a specific wheel and a specific breaker. Texture makes it worse. A smooth, thinner porcelain can still snap if the wheel is right and the bed is long enough. A structured or rustic face gives the wheel less of a clean track. Large-format slabs add a second problem: the bed is shorter than the tile, so you never get a single score. Those two failures look the same in the bin and have different causes.
What UK guides say, and where they disagree
Walls and Floors treat wheel diameter as a starting point, not a law: about 8 mm for smooth porcelain, 18–22 mm for textured, and a wet saw when the tile is thicker or more structured. They also say you follow the cutter maker, not their table. Wickes describes porcelain as delicate and usually more than 15 mm, and points those pieces at a wet diamond saw. Topps Tiles says a heavy-duty manual can still cut porcelain with the right wheel, and that a blade supplied with an electric saw is often ceramic-only. Those millimetre lines do not match, and they should not be averaged. Wickes’ “usually more than 15 mm” is their wording, not a measurement of the tile in your crate. Walls and Floors’ 8 mm and Topps’ ceramic notes are starting points from different pages. The rule you can use is narrower: read the cutter’s own maximum, then test an offcut. If the listing says 12 mm and the tile is 14 mm, you are already past the rail, whatever a blog’s average says. Follow the cutter, not the average. The TILER 1200 mm is the only rail in this set that states a 22 mm wheel, which sits in the Walls and Floors textured band. The short rails say tungsten carbide and give no diameter. That missing number is a reason to test, not a reason to invent 18 mm.
What these machines claim
BLOSTM and MasterWorks both claim porcelain, exclude granite and marble, and stop at 12 mm on a 430 mm bed. MasterWorks has a review that failed on 10 mm tiles. BLOSTM has a beginner who cut four 12 mm tiles. Neither result is a success rate. The TILER 430 mm also claims porcelain to 12 mm and says it is not for large-format tiles. Some reviews on that page describe a 630 mm cutter; ignore those for this spec. The ROJOO listing claims porcelain from 6–15 mm on a 600 mm bed. One review cut 600 × 600 mm tiles with no chips. Other reviews on the same page describe a 48 inch machine. Keep the 600 mm table, drop the 48 inch sentences. The TILER 1200 mm claims ceramic, porcelain and marble to 16 mm, with a 22 mm wheel. Reviewers who like the long bed still warn that very hard porcelain needs one careful, continuous score. The marble line is a listing claim, not a test. The Vitrex table does not print porcelain in the same way. Reviewers report some porcelain success and also report swapping the supplied continuous-rim disc because it was weak on that material. Topps already flags supplied electric blades as often ceramic-only. A replacement porcelain blade is a review pattern, not a lab result. Reviewers also say 600 mm squares do not fit the table, so a wet saw in this set is not an automatic porcelain answer.
When to leave the rail
Leave the rail when the first offcuts crack, chip, or refuse to snap, even though the tile is inside the printed length and thickness. Leave it when the face is heavily textured and the wheel will not track. Leave it when the cut is a notch or an L; that was never a rail job. Leave it when the tile is thicker than the listing, including Wickes-style pieces they describe as usually over 15 mm if your cutter stops at 12 mm. A wet saw is the next tool, not a second score. The Vitrex can take small porcelain pieces if you keep the water on and, if reviews are your guide, budget for a different disc. It cannot take a 600 mm square. Large-format porcelain that has already failed on a long rail is hire or a tiler, not another pass on the same wheel. Named skips for each listing sit on the best tile cutter page. Do not dry-cut the leftover pieces on the MXBAOHENG. The bullets allow the nozzle to come off. HSE still wants water on silica-bearing tile. Do not treat the BLOSTM 5.0 as porcelain proof, and do not treat the TILER marble line as tested. If three offcuts have already failed, you have the answer.
Common questions
Can I score and snap porcelain?
Sometimes, if the tile is inside that cutter’s length and thickness and the first offcuts snap clean. Walls and Floors allow smooth thinner porcelain on a rail with the right wheel. Wickes points thicker porcelain at a wet saw. Test an offcut. Do not take the box word as a result.
What wheel size should I look for?
Walls and Floors start at about 8 mm for smooth porcelain and 18–22 mm for textured. Only the TILER 1200 mm in this set states a 22 mm wheel. The other rails say tungsten carbide and omit the diameter. Follow the cutter’s own maximum, not an average of the blogs.
What if the tile is thicker than the listing?
Do not use that rail. A 12 mm cap does not become 14 mm because the stars are high. Wickes’ “usually more than 15 mm” is a reason to measure your tile, not a reason to ignore the listing.
Will the Vitrex blade cut porcelain?
Some reviewers say yes on small pieces. Others swap the supplied disc because it struggles. Topps notes that boxed electric blades are often ceramic-only. Budget for a porcelain disc if you use this table, and do not expect a 600 mm square to fit.
Which rails say they are not for marble or granite?
BLOSTM and MasterWorks. The TILER 1200 mm claims marble. That claim is not a test, and reviewers still caution on very hard porcelain.
Why do two UK guides disagree on millimetres?
Because they are different pages with different starting points. Wickes talks about porcelain that is usually over 15 mm. Walls and Floors give wheel sizes as a guide and tell you to follow the cutter. Do not average them. Measure the tile and read the listing.
When do I stop and use a wet saw or a tiler?
After failed offcuts, on textured or over-thick porcelain, on notches, and on large-format pieces that do not fit the bed or the Vitrex table. A tiler is the right call when visible corners keep cracking or the only saw has a damaged guard.
Related pages
Sources
Public UK sources used for this comparison. Listing prices, stars and review counts are the amazon.co.uk figures saved for this set on 19 October 2026.
- HSE — cutting roofing tiles (retrieved 19 October 2026)
- HSE — wet cutting (retrieved 19 October 2026)
- HSE — PUWER overview (retrieved 19 October 2026)
- GOV.UK — Electrical Equipment (Safety) Regulations 2016 (retrieved 19 October 2026)
- Screwfix — tiling tool buying guide (retrieved 19 October 2026)
- Walls and Floors — which tile cutter (retrieved 19 October 2026)
- Wickes — how to cut tiles (retrieved 19 October 2026)
- Topps Tiles — cutting tiles (retrieved 19 October 2026)