UK trade-and-hazard guidance by the Riskora Editorial Team
Tile cutting — particularly porcelain and engineered stone — generates respirable crystalline silica at exposure rates that have triggered a wave of accelerated silicosis cases in the UK and Australia. Engineered stone (used in worktops and large-format tiles) can contain 90%+ silica by mass, far higher than natural stone. A tiler's RAMS must address wet cutting as the default, dry-cut bans on engineered stone, and specific RPE selection for short-duration high-concentration tasks like grinder use.
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Control of Substances Hazardous to Health Regs 2002 (COSHH)
Regulations 6, 7 & 9
Adequate control of RCS exposure plus thorough examination and test (TExT) of any LEV at intervals not exceeding 14 months.
HSE Workplace Exposure Limit (EH40)
RCS — 0.1 mg/m³ (8-hr TWA)
Engineered stone exposure can exceed WEL within 30 seconds of dry cutting. Wet cutting is mandatory in practice.
Every UK RAMS reviewer applies the hierarchy of controls in the order below. Defaulting straight to PPE is the single most common reason a RAMS fails review.
1. Eliminate
Order tiles cut to size from the supplier where the layout allows — most porcelain suppliers offer waterjet cutting.
2. Substitute
Use a wet bench saw (Rubi DC, Sigma) instead of an angle grinder for any cut larger than 100mm. Use a manual tile cutter for straight cuts on ceramic.
3. Engineering controls
Continuous water suppression on all powered cutting. Bench-mounted LEV for grinder work where wet cut is impossible (cutouts, notches).
4. Administrative controls
Dry cutting of porcelain or engineered stone is prohibited. Cutting bay sited away from finishes and welfare facilities. M-class vacuum for clean-down only.
5. PPE (last line)
FFP3 fit-tested mask for any grinder use, eye protection, cut-resistant gloves, hearing protection above 85 dB(A).
Failing to distinguish between ceramic and engineered stone. RAMS that say 'tile cutting' generically miss the fact that engineered stone changes the entire control regime. Specific material identification is now expected by competent reviewers.
An illustrative extract structured for principal-contractor review. Site-specific facts must be substituted and checked by a competent person.
Material: 12mm porcelain (Italian, ~25% silica content). Cutting method: Rubi DC-250 wet bench saw with continuous water feed for all cuts above 50mm. Manual tile cutter (Rubi TX) for straight cuts. Angle grinder use restricted to internal cutouts only — operative wears FFP3 (3M 8835+, fit-test ref TIL-2026-007), bench LEV (M-class) on extraction, water spray bottle continuous use. Dry cutting prohibited at all times. Daily wet-cut water tray refresh, M-class vacuum clean-down before walk-on.
Pre-shift water reservoir check. M-class vacuum filter status. Cutting position downwind of workspace. Fit-test certificate cross-check.
Why is engineered stone so dangerous?
Engineered stone (used in some large-format porcelain and worktops) can be 90%+ crystalline silica. Cutting it produces RCS at concentrations that have triggered fatal accelerated silicosis cases in workers as young as their 30s. Australia banned engineered stone outright in 2024.
Is wet cutting always required?
For any powered cut on porcelain, stone or engineered stone — yes, in practice. The HSE expects engineering controls before PPE under COSHH Reg 7(7), and water suppression is the only practical engineering control on a tile saw.
Can I dry-cut a small notch with a grinder?
Only as a last resort, with bench LEV and FFP3 RPE in place, and only on ceramic (not porcelain or engineered stone). The RAMS must justify why wet cutting was not used.
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