What to Do When Pests Are Found in a Dublin Staff Canteen

A Tuesday in early October. A staff canteen in a Sandyford business park, roughly 180 people on site. The office manager rang at 07:50, because a member of the catering team had found droppings along the plinth under the servery counter and photographed them. They had already put down two shop bought traps and moved the bread. Our supervisor was on site by 09:00. The droppings were fresh, and the traps were the least useful thing in the room.

The short answer: what to do in the first two hours

Stop food service in the affected area, leave the evidence where it is until it is photographed, and make two phone calls rather than one. Pest control and cleaning are separate jobs and you need both, in that order.

1. Stop serving and preparing food in the affected area.
2. Do not sweep or vacuum droppings, and do not move the evidence before it is photographed.
3. Photograph everything, with date and time.
4. Call a licensed pest control contractor. In Ireland only a registered professional may apply rodenticide.
5. Call your cleaning contractor and brief a deep clean and sanitation of the affected zone.
6. Discard any open or exposed food and any packaging showing gnaw damage.
7. Secure and empty bins, and check the external bin compound.
8. Notify your Environmental Health Officer if the canteen is a registered food business, and tell your landlord or managing agent.

First, the honest bit: we are a cleaning contractor, not a pest control company

Premier Contract Cleaning does not hold PMU registration, does not lay rodenticide, and will not offer to. That is worth saying inside the first screen rather than burying it.

Here is the division. Pest control is the licensed elimination of the population that is there right now. Cleaning is the removal of the food source and the harbourage that made the population viable in the first place. Do one without the other and you will be back here in six weeks.

The legal position matters too. In Ireland, professional rodenticides may only be bought and used by registered Pest Management Trained Professional Users holding a PMU number, under the framework operated by the Pesticide Registration and Control Divisions of the Department of Agriculture, Food and the Marine. Since 1 January 2018, proof of competence has been required at the point of sale for anticoagulant rodenticide products.

Is your staff canteen a food business? This changes everything

A lot of office managers do not know the answer, and it is not an embarrassing question. It is simply not something you think about until the morning you need to.

A food business in Ireland must notify the HSE before it starts operating. Notification goes through the National Environmental Health Service and results in entry on the food business register with a unique reference number. Environmental Health Officers employed by the HSE are the people who inspect and enforce.

There are three common Dublin setups, and each behaves differently.

A catered canteen run by a catering contractor

Almost always a registered food business. The caterer is the food business operator, so the primary legal duty sits with them.

That does not get you off the hook. The building owner and the facilities manager remain exposed reputationally and contractually, and in practice you will be the one fielding the questions from staff and from your director.

An unmanned staff kitchen with a microwave, kettle and fridge

Usually not a registered food business. The hygiene and welfare duties under workplace safety law still apply, and the Health and Safety Authority is the relevant body there rather than the FSAI.

Do not relax about it. A rodent problem in an unmanned kitchen is very often the source of the problem in the canteen next door, because the population does not respect your organisation chart.

A hybrid, a deli counter or a coffee bar inside the office

Treat it as a food business until you have confirmed otherwise, in writing, with someone who knows.

The cost of assuming wrong in that direction is a slightly over cautious morning. The cost of assuming wrong in the other direction can be a Closure Order with your building's name on a public list. For most Dublin offices this sits inside the wider office cleaning in Dublin contract anyway, which is where the specification should name it explicitly.

How to tell which pest you have, and how bad it is

Identification changes the response, the cost and the timeline. Fifteen minutes with a torch will tell you most of what a contractor will confirm.

Reading the severity signals

• Fresh droppings are dark and soft. Old ones are grey, dry and crumble when pressed with a gloved finger.
• Smear marks mean animals are running the same route repeatedly, so you are looking at a route, not an accident.
• A live sighting in daylight in a canteen is a serious signal. It usually means the population is large enough that competition is pushing animals out during the day.
• Gnaw damage to packaging means direct food contact has already happened.
• Any evidence inside a food storage area or on a food contact surface is a stop the line moment. No judgment call needed.

What can actually happen if you get this wrong: enforcement in Ireland

Nobody enjoys this section, but knowing the ladder is better than imagining it.

Enforcement orders are published on the FSAI website. Closure Orders and Improvement Orders remain listed in the enforcement reports for three months from the date the premises is judged to have corrected the issue, and Prohibition Orders for one month. A Closure Order is lifted when the premises has improved to the satisfaction of the authorised officer, not when you feel ready.

That publication period is the part readers underestimate. The mice are gone in weeks. The listing is searchable for months, and the search result outlives both.

This is not hypothetical for Dublin workplace canteens. In one published FSAI enforcement report, a canteen at Dublin City Council's civic offices was closed following an inspection that recorded a live rodent seen through a hole in the wall in the food preparation area, along with mice droppings and urine, food debris, and grease embedded on equipment and surfaces.

Read that finding list again. Four items were recorded. Two of them, the food debris and the embedded grease, are cleaning failures, not pest control failures. That is the whole argument of this article in one enforcement entry.

Where pest control ends and cleaning begins

Bait removes the animals that are there now. If the grease line and the cardboard are still there when the treatment finishes, you have created a vacancy in a building that is still advertising.

Removing the food source

An office canteen presents a very specific menu, and almost none of it is on a plate.

• Grease film on plinths and skirtings, built up in thin layers over years.
• Spillage in the 40mm gap behind fixed servery units that has never been reached.
• Crumb accumulation in cupboard runners and drawer channels.
• Sugar and milk residue at the coffee station, which is the single most productive spot in most offices.
• Condensate trays under fridges, which supply water as well as food.
• Dishwasher waste voids and the space behind the machine.
• Floor gullies and gully baskets.
• Open bins, and bins whose bases have never been washed.
• Personal food in desk drawers and lockers.
• The communal fridge that nobody owns and nobody empties.

For scale, a mouse needs roughly 3 grams of food a day. A crumb line under a counter is not a mess. It is a food supply that will run for years.

Removing the harbourage

Cardboard is the single most common harbourage material in an office dry store, and it is almost always there for a good reason. Somebody kept the delivery boxes because they might be useful.

Then there are stacked pallets, redundant equipment parked behind a door, cluttered under sink voids, insulation voids around pipework, dead storage at the back of canteen presses, and soft furnishings in the breakout area.

Removing all of that is a cleaning and facilities job. No pest contractor is going to do it for you, and most will simply note it on the report.

A serviced office block in Dublin 2 had four years of retained cardboard delivery boxes stacked against a warm riser wall in the dry store. The treatment had worked twice and failed twice, and everyone had concluded the pest contractor was no good. Removing the cardboard permanently was what actually ended it. The riser wall was warm, dry and dark, and the boxes turned it into a nesting site with a food shop attached.

The proofing gap in between

Proofing is the third job, and it belongs to neither contractor. Sealing gaps, fitting bristle strips to door bottoms, drain covers, insect screens on external openings, closing service penetrations where pipes and cables pass through walls.

In a leased Dublin office this is a fabric job, which usually makes it the landlord's or the building maintenance team's. Both your pest contractor and your cleaner will report the defects, and neither can necessarily fix them.

Push on it anyway, because the numbers are unforgiving. A mouse can pass through a gap of around 6mm, which is smaller than almost anyone assumes when they look at a doorway and decide it is fine.

How to clean up droppings safely, step by step

This is not ordinary cleaning, and doing it the ordinary way aerosolises contamination into the room.

1. Isolate the area and stop food preparation and service in it.
2. Photograph before touching anything.
3. Put on disposable gloves, with additional protection where droppings are extensive or the space is confined.
4. Ventilate the space before starting.
5. Never dry sweep and never use a domestic vacuum. Both put contaminated particles into the air you are standing in.
6. Dampen the droppings and the surrounding surface with a suitable disinfectant and allow the stated contact time before removing anything.
7. Lift with disposable cloth or paper, working from clean to dirty, straight into a sealed bag.
8. Remove all open food, damaged packaging, and anything in contact with the affected zone.
9. Strip out the zone. Pull out mobile units, lift plinths where they can be removed, empty presses fully.
10. Degrease and wash all surfaces, including vertical faces and undersides that nobody normally reaches.
11. Sanitise food contact surfaces last, after the soil is gone. Disinfectant applied over grease does very little.
12. Dispose of waste as contaminated waste in sealed bags, and record what was removed.

Never do this:

• Never dry sweep droppings.
• Never use a domestic vacuum on them.
• Never spray disinfectant over grease and call the surface sanitised.
• Never put droppings into an open bin in the same room.
• Never let anyone lay poison who is not a registered professional.

The deep clean scope: what a proper post infestation clean covers

Use this to brief a contractor, whether or not that contractor is us. A specification you can hand over is worth more than a quote you cannot compare.

Servery and food preparation

• All surfaces, splashbacks and shelving, with shelving removed and washed rather than wiped in place.
• Under and behind fixed units, including the plinth voids.
• Equipment strip down and degrease.
• Extract canopy grease removal where it is in scope.

Dry store

• Full destock, with stock inspected and damaged stock discarded.
• Shelving washed, floor and wall junctions cleaned.
• Cardboard removed permanently, not restacked.

Wash up and wet areas

• Dishwasher voids and waste, mop sink, condensate trays.
• Floor gullies, gully baskets and drain covers. This is usually where the commercial washroom cleaning crew and the canteen crew overlap.

Seating and breakout

• Floors including under fixed seating.
• Soft furnishings and carpet and rug cleaning where contaminated.
• Vending and coffee station strip down, communal fridge emptied and sanitised.

Waste and external

• Internal bin bases and lids.
• Bin store floor and walls, external compound wash down, drainage around the compound.
• Removal of pallets and stored cardboard.

On documentation, here is exactly what we leave behind: a dated scope of works, before and after photographs, the products used with data sheets, the names of the operatives, and sign off by a named account manager. That pack sits alongside your pest contractor's report, and together they are what an Environmental Health Officer will actually want to see.

A real site example: the Sandyford canteen that was clean on the surface and feeding mice underneath

Back to that October morning. The first thing worth saying is that the canteen looked fine, and the daily cleaning team were not at fault. The floors were clean, the surfaces were clean, the servery was tidy.

The servery units were bolted to the floor and had not been pulled out since the fit out. Behind the plinth there was a continuous line of dried spillage and grease running the full length of the counter, going back years.

Outside, the bin compound gate did not close fully, and flattened cardboard was being stored beside it rather than inside the waste stream. The pest contractor found a service penetration behind the dishwasher where pipework passed through the wall and had never been sealed.

We told the office manager on day one that our deep clean on its own would not solve it. If the bin compound and the penetration were not dealt with, we would be back in six weeks doing exactly the same clean. That is not a comfortable thing to say when you are quoting for work, but it is the truth and she needed it in writing.

Before and after:

We did the strip out and deep clean over two nights out of hours. The pest contractor treated and monitored, the landlord's team sealed the penetration, and the canteen reopened without losing a single day of service. The client kept a joint evidence pack with both contractors' documentation in one folder, which is exactly what we would want any client to do.

What to tell your staff, and when

Tell them the same day. The photograph is already circulating, and a message from you competes better with it than silence does.

Say what was found, where, what has been stopped, who has been engaged and when you expect to reopen. Do not minimise it, because people can see the closed canteen. Do not promise a date you cannot hold, because you will be held to it.

There is one ask you need to make in the same message, and it is the one people skip.

Model notice: This morning we found evidence of pest activity in the canteen. We have stopped food service there, and we have engaged a licensed pest control contractor and a specialist cleaning contractor, who are both on site today. We expect to update you on reopening by Thursday. In the meantime, please clear all food from your desk drawers and lockers, and take anything of yours out of the communal fridge by 4pm today. Food stored at desks is one of the most common reasons this recurs.

That last point is not padding. Desk food and forgotten fridge contents are the secondary food source in most offices, and they will quietly undo an expensive canteen deep clean.

When to call a professional and when your own team can handle it

The honest rule of thumb: if there is a single item of evidence with an obvious cause you can remove in ten minutes, handle it yourself. If there is a pattern, stop and make both calls.

An office manager in the IFSC bought traps and a sonic repeller online, then cleared the visible mess herself with a domestic vacuum. She rang us three weeks later when droppings reappeared in the same line along the same skirting. The traps were beside the point. By then the clean up method itself had become part of the problem, because the vacuum had moved contamination around the room and the food source under the units had never been touched.

Preventing it happening again

That last row has a date attached for a reason. Rodent pressure into Dublin commercial buildings rises as outdoor temperatures fall from late September, which means the external audit and the bin compound clean belong in September, not in December when you already have a problem. The same applies to business park units in Leopardstown and Citywest where the service yard is shared with neighbours you do not control.

There is a compliance point underneath all of this that is worth understanding. The FSAI lists both pest control and cleaning and sanitation as prerequisite programmes, the foundation on which HACCP based procedures sit. The FSAI's own framing is that the majority of hazards can be controlled by prerequisite programmes, and that they are the foundation for the HACCP based procedures a business implements.

In practice that means your cleaning schedule is not administrative housekeeping. It is part of your food safety management system, and an Environmental Health Officer will read it as such.

Cost, timing and how long the canteen stays closed

We will not put a figure on this page, and we do not price a canteen deep clean from a photograph.

On timing, a strip out and deep clean of a mid sized office canteen is usually one or two nights of out of hours work. Pest treatment is a course rather than a visit, with monitoring over the following weeks. Proofing depends entirely on how fast your landlord or maintenance team moves.

Reopening, in a registered food business, is at the satisfaction of the authorised officer. Not at your convenience, and not on the date you announced to staff.

The correct order is: survey, stop and isolate, pest contractor first visit, deep clean, proofing, reopen, monitoring visits, revised cleaning specification. Getting that order wrong is the most expensive mistake available here, because a deep clean done before treatment simply gets recontaminated.

A client with a unit in Blanchardstown wanted the deep clean done on a Saturday daytime to avoid an out of hours rate. We moved it to two nights instead, because the strip out could not be done with staff moving through the building, and a half done strip out is worse than none.

Frequently asked questions

Do I have to report mice in a staff canteen in Ireland? If the canteen is a registered food business, FSAI guidance directs operators to notify a pest contractor and their Environmental Health Officer on discovering an infestation. If it is an unmanned staff kitchen, there is no food business notification duty, but workplace hygiene duties still apply.

Can a staff canteen be closed down over rodent activity? Yes. Under section 53(1) of the FSAI Act 1998, an authorised officer may serve a Closure Order where there is, or is likely to be, a grave and immediate danger to public health. Closure Orders are published on the FSAI website and remain listed for three months after the issue is corrected.

Can a cleaning company do pest control in Ireland? No. Professional rodenticides may only be bought and used by registered Pest Management Trained Professional Users holding a PMU number, under the Department of Agriculture's Pesticide Registration and Control Divisions framework. A cleaning contractor removes the food source and harbourage. A licensed pest contractor removes the population.

Who is responsible for pest control in a leased Dublin office? It depends on the lease. Proofing, building fabric and external areas including the bin compound usually sit with the landlord or managing agent. Internal hygiene and, where it applies, food business compliance sit with the occupier or the catering contractor. Check the lease early rather than late.

Is it safe to eat food from a canteen where droppings were found? Discard any open or exposed food, anything in the affected zone, and any packaging with gnaw damage. Sealed, undamaged packaging away from the affected area is usually retained. When there is genuine doubt, discard it and record the decision and the reasoning.

How do I safely clean up mouse droppings in a workplace kitchen? Never dry sweep and never use a domestic vacuum, because both aerosolise contamination. Ventilate, wear gloves, dampen the droppings with a suitable disinfectant and allow the contact time, then lift with disposable paper straight into a sealed bag. Degrease, then sanitise last.

How long does it take to get rid of mice in a commercial kitchen? Treatment is a course over several weeks with monitoring visits, not a single call out. The deep clean is usually one or two nights. How quickly it holds depends on the proofing work, which is the part outside both contractors' control and usually the slowest.

Why are there cockroaches in our office canteen? German cockroaches need warmth and moisture, so they harbour inside and behind warm equipment: dishwasher and fridge motor voids, under sinks, wet areas. That makes them as much a deep clean problem as a treatment problem, because the harbourage is inside machinery nobody strips down.

Do we have to throw away all the food? Not all of it. Open and exposed food goes, as does anything with gnaw damage or anything in direct contact with the affected zone. Sealed rigid or intact packaging outside the zone is normally retained. Record what was discarded and why in your food safety records.

What will the Environmental Health Officer look at? Evidence and how you responded. Expect questions on where activity was found, what was stopped, who was engaged and when, what was cleaned and how, what food was discarded, and what has changed in the cleaning specification since. Documentation is what answers all of that.

Get your canteen surveyed before it becomes an enforcement problem

If you have found something this morning, make the two calls first and read the rest of this afterwards. If you are reading this in September with nothing wrong yet, that is a much better week to book a survey.

We offer a free site survey of the canteen and back of house with a written deep clean and sanitation scope, at no obligation. It also gives you something to put in front of your director today.

• Out of hours, weekend and early morning scheduling, so the canteen does not lose a service.
• Documented sign off with dated before and after photographs and product data sheets.
• A named account manager and direct access to Catalin rather than a call centre.
• Eco friendly products where the standard allows, and our redo guarantee: if the clean is not perfect, we do it again, free.

One last time on the boundary. We will work alongside your pest control contractor and we will not replace them. If the root cause turns out to be the building fabric or the waste compound rather than the cleaning, we will tell you that in writing, even when it costs us the job.

Call 086 083 6141, email enquiries@premiercontractcleaning.ie, or book a free site survey. You can also read what our clients say or more about our commercial cleaning services in Dublin.

Catalin Fatul

Catalin Fatul is the founder and expert behind Premier Contract Cleaning, dedicated to providing top-notch cleaning solutions and tips. With a passion for cleanliness and a commitment to quality, Catalin brings years of experience in the cleaning industry to help readers maintain pristine spaces. Whether it's offering the latest cleaning hacks or recommending the best products, Catalin's mission is to make cleaning efficient, effective, and enjoyable.