The Health and Safety Executive (HSE) has launched a nationwide enforcement crackdown in 2026, conducting over 1,000 site inspections specifically targeting Respirable Crystalline Silica (RCS) exposure on construction sites and in stone working environments. HSE has declared dry cutting of stone as unacceptable practice — and contractors who cannot demonstrate compliant dust suppression or extraction are facing prohibition notices, improvement notices and in serious cases prosecution.
This is not a future risk. It is happening now. If your operatives are cutting stone, concrete, block, brick, tile or engineered stone without compliant dust controls in place, you are already in the enforcement window.
What is Respirable Crystalline Silica?
Silica is a naturally occurring mineral found in stone, concrete, brick, mortar, sandstone, slate and many other construction materials. When these materials are cut, ground, drilled or sanded, fine dust particles are released. The finest particles — Respirable Crystalline Silica (RCS) — are small enough to penetrate deep into the lungs. They cannot be expelled and accumulate over time.
Prolonged exposure to RCS causes silicosis — an irreversible, progressive and potentially fatal lung disease. There is no cure. Silicosis also significantly increases the risk of lung cancer, tuberculosis and other respiratory conditions. It is classified as an occupational disease and a significant cause of work-related death in the UK construction sector.
The legal position — COSHH and the Workplace Exposure Limit
Under the Control of Substances Hazardous to Health Regulations 2002 (COSHH), RCS is classified as a hazardous substance. Employers have a legal duty to:
- Assess the risk of RCS exposure for any task that generates silica dust
- Implement engineering controls to reduce exposure — suppression (wet cutting) or extraction (on-tool M-Class vacuum) — before considering RPE
- Reduce exposure below the Workplace Exposure Limit (WEL) of 0.1mg/m³ as an 8-hour time-weighted average
- Provide health surveillance for workers regularly exposed to silica dust
- Maintain COSHH assessments and method statements that specifically identify the dust control measures in use
The WEL of 0.1mg/m³ is one of the lowest occupational exposure limits in UK health and safety law. Standard vacuum cleaners — and even many industrial vacuums — exhaust fine particles back into the air rather than capturing them. Only M-Class (minimum 99.9% filtration at 1 micron) or H-Class (99.995% at 0.3 micron) extraction meets the engineering control standard for silica dust.
Why dry cutting is now unacceptable
HSE's position, confirmed through the 2026 enforcement campaign, is that dry cutting of stone and similar materials without extraction is not a risk that can be managed through RPE alone. Respiratory Protective Equipment is a last line of defence under the COSHH hierarchy of controls — it does not substitute for engineering controls and it does not protect bystanders or others on site.
Dry cutting generates RCS concentrations that can exceed the WEL by a factor of ten or more within seconds. A standard angle grinder cutting stone dry, without extraction, creates a dust cloud that disperses across the work area and affects everyone in the vicinity — not just the operative holding the tool.
The compliant alternatives are wet cutting (water suppression) or on-tool extraction using M-Class certified equipment connected directly to the cutting tool. On many sites, wet cutting is impractical — the ground conditions, the materials, the indoor environment or the tool type make it unsuitable. On-tool M-Class extraction is the practical compliance solution for the majority of stone cutting operations.
What HSE inspectors are looking for
Based on HSE's published enforcement guidance and the focus of the 2026 inspection campaign, inspectors attending sites where stone cutting, grinding or drilling is taking place will be looking for:
- Evidence that a COSHH assessment has been carried out specifically for RCS-generating tasks
- Engineering controls in use at the point of observation — wet cutting or on-tool extraction
- Confirmation that extraction equipment is M-Class or H-Class certified — not just any vacuum
- Method statements that specify the dust control measures being used
- Evidence of health surveillance for workers with regular exposure
- Tool compatibility — that the extraction equipment is connected to the tool being used and functioning correctly
If an operative is dry cutting when an inspector arrives, a prohibition notice stopping that work immediately is the likely outcome. Improvement notices, fixed penalty notices and prosecution follow for repeated or serious breaches.
Materials that generate RCS
RCS exposure risk applies to any task cutting, grinding, drilling or abrading materials that contain silica. The principal risk materials on construction sites include:
- Engineered stone — kitchen worktops, bathroom surfaces. Silica content up to 93%. The highest risk material in current use. Subject to specific HSE guidance.
- Sandstone and natural stone — up to 70-90% silica
- Concrete and mortar — typically 25-50% silica
- Brick and block — typically 20-40% silica
- Fibre cement board — lower silica content but still above WEL when dry cut
- Slate — variable silica content depending on type
M-Class extraction — what it means and what it requires
M-Class (Medium hazard) is the minimum extraction standard for silica dust. An M-Class vacuum must achieve a minimum filtration efficiency of 99.9% at 1 micron particle size and must be tested and certified to EN 60335-2-69 (vacuum cleaners for industrial and commercial use) or IEC 60335-2-69.
The classification must appear on the machine itself. A vacuum that is described as suitable for fine dust, or that has a HEPA filter but no M-Class mark, does not meet the standard. The classification mark is the only evidence that satisfies an HSE inspector.
For on-tool extraction, the vacuum must also be compatible with the tool being used — correct hose diameter, correct airflow, correct connection to the tool's dust port. A mismatched connection that allows dust to bypass the extraction point is non-compliant regardless of what the vacuum itself is rated at.
V-TUF M-Class extraction for silica dust compliance
The V-TUF M-Class range is designed specifically for on-tool extraction in construction environments — built to withstand site conditions, sized for van-based trades, and compatible with the angle grinders, disc cutters, tile saws and other tools used for stone cutting:
- MINI HSV X2 — compact M-Class twin-motor, 240V. The van-based trades standard. On-tool extraction for angle grinders and disc cutters.
- MIGHTY HSV — 35L M-Class for sustained stone cutting operations and larger tool connections
- MIGHTY XL HSV — 55L M-Class for high-volume applications and extended working days
- RUCKVAC-ION — cordless M-Class for locations without mains power
All V-TUF M-Class machines carry the classification mark and are certified to the relevant standard. Certification documentation is available for COSHH assessments and method statements.
M-Class dust extraction range → | M-Class extraction hub → | Health-rated vacuum cleaners — why classification matters → | COSHH Regulations 2002 →
Telephone: 01522 787978 for equipment specification advice. Contact the V-TUF trade team →
