What is silica and why is it a risk?
Silica is a natural substance found in materials such as stone, rock, sand and clay. When these materials are cut, drilled, or polished, they release fine particles known as respirable crystalline silica (RCS).
RCS can reach deep into the lungs and prolonged exposure may cause silicosis, chronic obstructive pulmonary disease (COPD), and even lung cancer. Workplace exposure to RCS is legally controlled under health and safety regulations.
Why are stone worktop installers at risk?
Recent concerns have highlighted that many stone worktops — whether made from natural or engineered stone — contain high levels of silica. Installers are at particular risk during tasks such as cutting, chiselling and polishing, especially when carried out on-site without dust controls.
HSE guidance: what employers must do
As part of its Work Right campaign, the Health and Safety Executive (HSE) has published clear do’s and don’ts for employers and installers.
Before installation:
- Ensure staff are trained and competent
- Minimise site work — pre-cut holes for taps and sinks in a controlled workshop environment
During installation:
- Use water suppression tools or on-tool dust extraction systems
- Wear suitable Respiratory Protective Equipment (RPE) with an Assigned Protection Factor (APF) of at least 20
After installation:
- Clean dust using a vacuum or wet methods — avoid dry sweeping
- Dispose of dust and waste correctly