Exposure to silica dust is a serious health risk in construction, demolition, quarrying, and industrial environments. When materials such as concrete, stone, brick, or mortar are cut, drilled, ground, or crushed, they release respirable crystalline silica (RCS) — fine particles that can be inhaled deep into the lungs.
The UK Health and Safety Executive (HSE) provides clear guidance on controlling silica dust under the Control of Substances Hazardous to Health Regulations 2002 (COSHH). This article explains how that guidance can be applied practically on site, using effective control measures to reduce risk and protect workers.
What is silica dust and why is it dangerous?
Silica is a naturally occurring mineral found in many common construction materials, including concrete, stone, bricks, tiles, and sand. When these materials are disturbed, microscopic silica particles become airborne and can penetrate deep into the lungs.
Repeated or prolonged exposure can lead to serious and irreversible health conditions such as silicosis, lung cancer, and chronic obstructive pulmonary disease (COPD). The HSE estimates that silica dust exposure contributes to hundreds of work-related deaths in the UK each year, making effective control measures essential.
UK regulations and legal responsibilities
Employers have a legal duty to manage silica dust risks under UK health and safety law, including:
This includes assessing exposure risk, implementing suitable controls, providing training and PPE, and monitoring exposure where required. Official guidance is available through the HSE, including Control of exposure to silica dust (INDG463).
Identify high-risk activities on site
Silica dust exposure is most likely during tasks that disturb concrete, stone, or masonry materials, including:
- Cutting or sawing
- Grinding and polishing
- Drilling into concrete or brickwork
- Demolition and crushing activities
- Poor housekeeping, such as dry sweeping
Once these activities are identified, appropriate control measures can be put in place.
Reduce silica dust at the source
The most effective way to reduce exposure is to prevent dust from becoming airborne. Wet cutting and water suppression significantly reduce respirable dust during high-risk activities. On larger or more complex sites, dedicated dust suppression equipment provides continuous, site-wide control.
Ace Plant offers a wide range of dust suppression equipment suitable for construction and industrial environments, including:
- Mobile dust suppression units, such as the
2250L,
5200L,
7200L, and
9000L dust suppression units
- Targeted suppression solutions, including
rain guns,
spinning disc systems, and
road wash systems
- Compact and specialist systems, such as the
1800L Quickspray,
DF7500 MPT Dust Fighter, and
Smart Dust Fighter
These systems help control airborne dust at source, reducing reliance on PPE alone.
Controlling silica dust exposure through site planning
Dust suppression equipment should be supported by good site management and planning. This includes organising work to minimise cutting and grinding, establishing exclusion zones around high-dust activities, and limiting the time individuals spend in exposed areas. Dry sweeping should be avoided, with wet methods or vacuum systems used instead.
Further practical guidance is available in Ace Plant’s construction dust safety guide.
PPE as a last line of defence
Personal Protective Equipment (PPE) remains an important control but should only be used in addition to engineering and organisational measures. Where required, suitable respiratory protective equipment (RPE) should be provided, correctly fitted, and maintained. Under COSHH, PPE alone is not considered sufficient if exposure can be reduced further at source.
Training, monitoring, and health surveillance
Reducing the risk of silica exposure also depends on effective training and supervision. Workers should understand the health risks, know how to use dust control measures correctly, and be supervised to ensure procedures are followed. Where exposure levels may approach workplace limits, monitoring and health surveillance may be required to protect long-term health.
Real-world dust suppression in action
Ace Plant’s dust suppression solutions are already helping to control silica dust on live sites! Take a look at some of our case studies below.
Dust suppression with the Quickspray
This case study shows how the Quickspray was used to provide targeted dust suppression on a live construction site. Its compact design and controlled water output allowed operators to suppress dust at source, reducing airborne particles during high-risk activities without disrupting ongoing works.
Quickspray solving dust issues for a council yard
In a busy council yard environment, dust generated by vehicle movements and material handling was causing operational and environmental concerns. The introduction of a Quickspray unit provided an effective solution, helping to control dust levels, improve air quality, and maintain a cleaner, safer working area.
A breath of fresh air for Aggregate Industries
This project highlights the use of dust suppression equipment in an aggregates environment where airborne dust posed a significant challenge. By implementing a tailored suppression solution, dust levels were reduced across the site, improving working conditions and supporting compliance with health and safety requirements.
Telehandler Dust Fighter in action
This case study demonstrates how a Dust Fighter unit mounted to a telehandler delivered flexible, mobile dust suppression across a large work area. The solution enabled effective control of airborne dust during material handling and demolition activities, helping to protect workers and surrounding environments.
FAQs
What is the safest way to reduce silica dust on site?
Controlling dust at source using wet methods and dust suppression equipment is the most effective approach, supported by good site planning and PPE where required.
Is wearing a mask enough to protect against silica dust?
No. PPE must always be used alongside engineering controls such as water suppression and extraction.
Can short-term exposure to silica dust be harmful?
Yes. Even short-term exposure to high concentrations can cause lung damage and increase long-term health risks.
Reducing the risk of exposure to silica dust requires a balanced approach that combines engineering controls, site management, training, and PPE, in line with UK regulations. By controlling dust at source and using effective suppression equipment, employers can protect their workforce, remain compliant with COSHH, and maintain safer, more productive sites.
Get in touch with our team today to explore our full range of dust suppression equipment for your site.