Construction has a silica problem everyone talks about. Food businesses have the same problem and almost no one is talking about it.

The Dust Nobody Sees Coming

Silica is the second most common mineral on earth. It sits inside quartz, sandstone, granite, and engineered stone. When you cut, grind, sand, or crush materials containing silica, you release respirable crystalline silica, particles fine enough to pass through your nose and mouth and lodge deep in lung tissue. The body cannot remove them. Over years, they trigger silicosis, a progressive and irreversible scarring of the lungs. There is no cure. There is no treatment that reverses the damage. There is only slow deterioration.

Food businesses generate this dust in ways that never appear on any hazard register. A tiler refitting a kitchen floor. A contractor cutting a granite worktop to fit around a new sink. A worker dry-grinding spices or grains with industrial equipment. Staff sanding grout between ceramic tiles during a refurbishment. Each of these activities can push airborne silica concentrations well above the workplace exposure limit of 0.1 mg/m³, the level set under Irish chemical agents regulations. Ten minutes of uncontrolled dry cutting can spike concentrations to many times that figure.

The difference between construction and food is simple. Construction sites now face active enforcement, formal dust plans, and HSA inspection campaigns. A busy commercial kitchen sees none of that scrutiny. The assumption is that food hazards are biological, chemical in the food science sense, or related to temperature. Nobody is thinking about the air.

Where Silica Hides in Food Environments

Worktop installation and modification. Granite and engineered stone worktops are standard in commercial kitchens. Every cut, every drill hole for a tap, every edge polish generates dust. Engineered stone is particularly dangerous because it contains up to 93% silica content, far higher than natural stone. When a fit-out contractor comes in to modify a worktop, they often work in an enclosed kitchen space with no local exhaust ventilation and no wet cutting. The kitchen staff are sometimes still on site.

Floor and wall tile work. Ceramic and porcelain tiles contain silica. Cutting them dry with an angle grinder in a kitchen or prep area pushes fine dust into the air. It settles on surfaces, equipment, and food contact areas, but it also stays airborne long enough for anyone nearby to inhale a significant dose.

Grain and spice processing. Industrial grinders used to mill grain, process dried spices, or grind rice flour generate respirable dust from raw materials that often contain silica compounds. Workers operating these machines daily, without respiratory protection and without local exhaust, accumulate exposure over years.

Renovation and maintenance. Routine maintenance in food businesses involves drilling into tiled walls, grinding back old grout, and cutting stone surfaces. These short-duration tasks are exactly the type that get overlooked. The thinking is that it only takes ten minutes. Ten minutes of high-concentration exposure, repeated across a working life, is how occupational disease develops.

What the Law Actually Requires

The Safety, Health and Welfare at Work (Chemical Agents) Regulations apply to silica dust in any workplace, not just construction. Irish food businesses are bound by the same exposure limits and the same hierarchy of controls. That means:

Eliminate the hazard where possible. Use pre-cut worktop sections instead of cutting on site. Source pre-tiled panels. Buy pre-ground spice products instead of processing whole dried materials in-house.

Substitute for lower-risk alternatives. Wet cutting instead of dry cutting. Vacuum-attached grinders instead of open tools.

Engineer the controls. Local exhaust ventilation on grinding equipment. Separate processing rooms with extraction systems.

Administrative controls. Limit the number of workers in a space during dusty tasks. Schedule grinding and cutting outside of service hours when fewer people are present.

Respiratory protective equipment as the last line of defence, not the first. An FFP3 mask worn correctly over a beard provides no meaningful protection. Fit testing is a legal requirement when RPE is used.

The problem is that most food business owners treat this hierarchy as construction guidance that does not apply to them. It does. The Health and Safety Authority does not carve out kitchens from chemical agents law.

The Specific Failure in Food Businesses

Walk into almost any commercial kitchen undergoing refurbishment and you will find a contractor cutting stone on a bench grinder without water suppression, no LEV, no respiratory protection, kitchen staff still moving through the space, and no one in charge who has thought about silica for even five seconds. The food business owner has a HACCP plan for their sausages. They have no chemical agents risk assessment for the dust their fit-out contractor is generating two metres from the pass.

This is not unique to small operations. Medium-sized catering companies, hotel kitchens, and food processing facilities repeat this pattern constantly. The contractor is treated as someone else's problem. But under Irish health and safety law, if you are the owner or manager of the premises where the work is happening, you carry duties as a person in control of a place of work. You cannot outsource legal liability along with the tiling contract.

Occupational asthma is also a documented outcome of repeated silica exposure, sitting alongside silicosis as a long-term consequence of ignoring dust in workplaces where it is not expected. Kitchen workers who develop breathing difficulties years down the line rarely connect it to the renovation work that happened when they were 28.

What a Food Business Should Do Now

Start with a chemical agents risk assessment. List every activity in your kitchen or food prep area that generates dust. Include contractor work. Identify which materials contain silica. Quantify exposure as best you can, and if you are uncertain, commission air monitoring.

Embed controls into contractor selection. Before any stone, tile, or grout work begins on your premises, require a method statement that specifies wet cutting, on-tool extraction, and appropriate RPE. Do not accept contractors who cannot produce this. The cost of a prohibition notice from the HSA, or a civil claim from a worker who develops lung disease, dwarfs the cost of specifying correct equipment.

Train your staff. They need to know what silica dust is, where it comes from in their workplace, and what to do if a contractor turns up and starts dry cutting. A worker who recognises the hazard and raises it is the cheapest control measure you have.

Review your in-house processing. If your kitchen grinds grains, flours, or dried spices, check whether local exhaust ventilation is fitted to that equipment and whether it is maintained and tested. Check filter replacement schedules. Check whether workers wear correctly fitted respiratory protection and whether they have been face-fit tested.

The Slow Accumulation Problem

Silicosis takes years to appear. A worker exposed to silica dust in a kitchen renovation in 2024 will not present with symptoms in 2025. They will present in 2040, possibly 2035 if the exposures were heavy. By then, the business may not exist, the contractor is long gone, and nobody can reconstruct what happened. That latency is exactly why this hazard stays invisible. There is no immediate, obvious consequence to reinforce the lesson.

The food industry has invested heavily in food safety systems over the past two decades. The occupational health side has lagged badly. A chef breathing in granite dust during a kitchen refit deserves the same protection as a construction worker on a countertop fabrication site. The law says so. The evidence on silicosis says so. The only thing saying otherwise is the assumption that kitchens are not really worksites when it comes to airborne hazards.

They are. Control the dust.