Respirable crystalline silica is the second-biggest occupational lung-disease risk in Ireland, behind asbestos. Most Irish silica exposure happens during abrasive-wheel work on stone, brick, concrete and engineered countertops. This guide explains the science, the law, the controls and the training every Irish workplace needs to keep the dust where it belongs - out of the operator's lungs.
What respirable crystalline silica is
Quartz, cristobalite and tridymite are the three crystalline forms of silica. All three appear in concrete, mortar, brick, granite, sandstone, slate and engineered stone. When an abrasive wheel cuts these materials, it generates a fine dust whose particles are small enough (less than 4 micrometres) to bypass the upper respiratory defences and lodge deep in the lungs. Repeated exposure causes silicosis - a chronic, irreversible scarring of the lung tissue.
The Irish exposure limit
The Code of Practice for Chemical Agents Regulations sets the exposure limit value (ELV) for respirable crystalline silica at 0.05 mg/m3 averaged over an eight-hour shift. Dry cutting concrete with an angle grinder routinely exceeds 5 mg/m3 - one hundred times the limit.
The five controls in priority order
1. Eliminate
Use pre-cut materials where the work allows it. Specify factory-cut kerbs, slabs and lintels rather than on-site cuts.
2. Substitute
Where on-site cutting is unavoidable, substitute the cutting method. Hand-held shears, snapping tools or specialist score-and-snap kits all eliminate the dust generation.
3. Wet cutting (engineering control)
The single most effective control for unavoidable abrasive-wheel cuts. A constant water flow over the cut traps 85 to 95 percent of the respirable particulate. Modern cut-off saws ship with a wet-cut kit; portable angle grinders can be fitted with the same.
4. Local exhaust ventilation (LEV)
For fixed cutting stations, an LEV hood mounted at the cut captures the dust at source. Combined with a HEPA-filtered M-class or H-class extractor, the operator's breathing zone stays well below the ELV.
5. Respiratory protective equipment (RPE)
The last line of defence and never the first. FFP3 disposable masks (filtration efficiency 99 percent) are the minimum for any silica work. For prolonged exposure, switch to a powered air-purifying respirator (PAPR) with a P3 filter.
The complete PPE set for silica work
- FFP3 mask, fit-tested, never with facial hair under the seal.
- EN 166 wraparound safety glasses + face shield.
- SNR 25+ hearing protection.
- EN 388 cut-B gloves.
- Disposable coverall (Type 5/6) for prolonged work to keep dust out of street clothes.
- Boot covers in heavily contaminated areas.
Air monitoring
Irish HSA expects employers carrying out routine silica work to commission air-monitoring surveys at suitable intervals. The survey measures actual operator exposure and validates the controls. Smaller workplaces can rely on validated control measures (wet cutting + RPE) without monitoring, provided the controls are documented and applied consistently.
Health surveillance
For workers with known regular silica exposure, health surveillance includes lung-function testing and chest X-rays at intervals proportionate to the risk. Records are kept for 40 years - silicosis can manifest decades after the original exposure.
Training - the legal foundation
Every operator carrying out abrasive-wheel work that generates silica needs:
- A current Abrasive Wheels Certificate.
- Awareness of silica risks and the specific controls in their workplace.
- RPE fit-testing where appropriate.
The silica module forms part of our Abrasive Wheels Course, with practical demonstration of wet-cut kits and RPE selection.
Why this matters in 2026
The growth of engineered-stone kitchen and bathroom installations in Ireland has driven a surge in silicosis cases. The Irish HSA has moved silica enforcement up the priority list and is treating it like asbestos enforcement - intervention is proactive, not reactive. A workplace caught dry-cutting engineered stone without controls now faces immediate prohibition.
Next step
Get the team certified, validate your controls and document your air-monitoring strategy. Begin with the Abrasive Wheels Course - EUR 35, 60 minutes, instant HSA-compliant certificate.
