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Slip Risk in Schools: A Practical Guide for School Leaders
Slip risk in schools is the likelihood that a pupil, member of staff or visitor will slip on a school floor, driven by wet weather, busy corridors, canteens and washrooms, and the grip of the floor itself. A school can go years without a recorded slip and still have floors with poor grip, because grip is invisible and most minor slips are never written down. The reliable way to know where the risk sits is to measure it.
“We’ve never had a serious slip” is not the same as “our floors are safe”
If you lead or manage a school, you carry responsibility for hundreds of people moving through the same buildings every day. When someone asks how your floors are doing, the natural answer is to check the accident book. If nothing serious is recorded, it feels fair to say the floors are fine.
That belief is worth challenging. No incidents does not mean no problem. Most slips go unreported, and near misses are the real warning sign. A pupil who slips in the corridor, catches themselves and carries on to their lesson will never appear in your records. This article explains why slip risk in schools is easy to miss, uses the CHIMES framework to show where it hides, and sets out practical steps to move from assumption to evidence, including on a limited budget.
Why is slip risk in schools different from other buildings?
Schools combine several risk drivers that rarely sit together in other buildings. Large numbers of people move at the same time, and they move in waves. Break times, lunchtimes and the end of the day put heavy footfall through corridors, stairwells and entrances within minutes.
The people involved are not typical either. Children run, rush, carry bags, play and get distracted. They are not being careless. They are being children. A school is designed for them, which means the environment needs to be safe for people who will not always be careful.
That is the central idea behind treating this as a grip problem rather than a slip problem. We cannot control people, and we should not blame the pupil who slipped. We can control the floor.
Schools also have a mix of spaces under one roof: entrances, corridors, canteens, kitchens, toilets and washrooms, PE changing rooms, sports halls, science labs, art rooms and sometimes a swimming pool. Each carries a different level of risk.
Why doesn’t a quiet accident book mean safe floors?
An accident book records only what has already gone wrong, and only when someone writes it up. In a school, that is a small slice of reality. A minor slip is usually brushed off, and a pupil may not think to tell anyone. Staff who slip often do not report it either.
Treating a quiet record as proof of safe floors is like judging a car’s brakes by the fact that you have not crashed yet. By the time an incident does appear, the grip problem beneath it has often existed for a long time.
There is a second problem. Grip is invisible. A corridor can look spotless and dry and still have poor slip resistance, particularly where years of footfall have worn the surface smooth. You cannot judge it by eye, or by how it feels when you walk across it in your own shoes.
Where does slip risk concentrate in a school?
The CHIMES framework gives you a structured way to look at what drives slip risk, rather than guessing. It covers six factors:
- Contamination: rainwater, mud, spilled drinks, food, cleaning residue, and water from toilets, sinks and showers
- Heel: the footwear pupils wear, which varies hugely and cannot be controlled, and the footwear staff wear, which sometimes can
- Individual: who is exposed, from young children to adults, and what they are doing, including running, carrying and rushing between lessons
- Maintenance: the cleaning products, methods and timings in use, and whether they help or quietly reduce grip
- Environment: weather coming in, lighting, stairs, ramps and transitions between wet and dry areas
- Surface: the floor material and its measured slip resistance
Not every part of a school carries the same risk. In most schools, a handful of zones deserve the closest attention:
- Entrances and lobbies, where wet weather meets indoor flooring
- Corridors and stairs on wet days, especially at busy transition times
- Canteens, dining halls and servery areas
- School kitchens
- Toilets and washrooms
- PE changing rooms and shower areas
- Sports halls and, where you have one, swimming pool surrounds
A useful way to think about it is by speed limits. Most of a school is a 70 mile an hour zone, where keeping floors clean, dry and clear of spills is enough. The areas above are closer to 20 mile an hour zones, where you need to go further.
Aren’t wet floor signs and cleaning enough?
Signs and cleaning have a place, but neither tells you how much grip a floor has.
A wet floor sign warns people that a hazard exists. It does not make the floor less slippery. If a sign is out all the time, it is a symptom of a problem that is not being dealt with, and it can show that a hazard was known and left in place. Young children are also less likely to read and react to a sign than an adult.
Cleaning is an activity. A safe floor is an outcome. A floor can be mopped every day and still carry real slip risk. The wrong product or method can leave a residue that lowers grip, and no amount of cleaning restores a surface that has worn smooth. Where possible, deep cleaning is best done out of hours, with signs used for the temporary hazard that cleaning creates.
Matting at entrances helps, but only if it is large enough, in good condition and covers where feet are wettest. On a rainy day, a floor can be wet well beyond the end of a mat.
How do you find out whether your school has a grip problem?
By measuring it. Slip resistance is assessed using pendulum testing, the method preferred by the HSE and relied on in UK slip litigation. It swings a rubber slider across the floor to mimic a heel strike, and produces a Pendulum Test Value (PTV). A PTV of 36 or above is generally regarded as low slip potential. Below that, risk rises as the number falls.
Testing should be done wet as well as dry, in the zones that are likely to get wet. There is little value in testing a dry classroom floor that will never be wet. A single reading is also only a snapshot. Floors change through wear, cleaning and footfall, so a result from a refurbishment says little about how the same corridor performs today.
Having measured data matters for another reason. Schools have duties under health and safety law to pupils, staff and visitors, and the standard is generally what is reasonably practicable. Dated test results show that you looked, not that you assumed. This is general information, not legal advice, so check what applies to your school with your local authority or trust’s health and safety adviser.
How can you reduce slip risk in schools on a limited budget?
Most schools do not have money to replace flooring, and most do not need to. The Slipology Method gives a sequence that puts effort where it matters.
Assess: measure the real risk in the priority zones, wet and dry. This focuses spending on the areas that need it, rather than treating the whole building as equally risky.
Amend: fix the floor and the conditions at source. Depending on what the measurements show, that might be changing cleaning products or methods, improving entrance matting, or treating a surface to raise its grip. In many cases, a floor can be treated without being replaced.
Advocate: get buy-in from caretakers, cleaning contractors, kitchen staff and teachers, so the standard holds in practice. Explain why it matters rather than adding more rules.
Assure: maintain grip through the right cleaning approach and planned re-testing, because school floors take heavy wear.
Affirm: keep dated records, so you can prove the result.
Slip Safety Services has found that organisations following this approach see a 57%+ average reduction in slip incidents. The improvement comes from addressing real causes in the right places, not from adding signs or reminders.
A practical starting checklist for a school:
- List your wettest and busiest zones, and rank them
- Find out when each was last tested, and whether it was tested wet
- Check that entrance matting is large enough and in good condition
- Ask your cleaning team or contractor which products and methods are used where
- Review where cleaning happens during the school day, and move it out of hours where you can
- Record near misses and slips, even minor ones, so you have real data
- Re-test on a schedule, not just after something goes wrong
What good looks like
A school managing slip risk well knows which zones carry the highest risk and has recent, dated PTV readings for them, wet and dry. Entrance matting is checked regularly. Cleaning products and methods are suited to each type of flooring, and deep cleaning happens when pupils are not there.
Near misses are recorded and used as information, rather than ignored because nobody was hurt. Standards are consistent across the site, or across every school in the trust. And when a governor, parent or insurer asks how safe the floors are, there is a measured answer, not a reference to how long it has been since the last accident.
The takeaway
An empty accident book tells you what has not been written down yet. It does not tell you whether your floors are safe. Most schools do not have a slip problem, they have a grip problem, and a grip problem can only be found by measuring it.
Next step
If you are not sure whether confidence in your school’s floors is backed by evidence, the Slip Prevention Scorecard takes under four minutes per building. It gives you an overall score and a score for each of the six CHIMES factors, so you can see where to focus first. For the fuller method behind measuring, improving and proving floor grip, Slipology by Christian Harris covers the process in depth.
FAQ
What is the most common cause of slips in schools?
Contamination is the most common factor, such as rainwater at entrances, spilled drinks and food in canteens, and water in toilets and changing rooms. But the floor surface matters too, because worn or smooth floors hold less grip when wet. Usually, more than one factor is involved at the same time.
Which areas of a school carry the highest slip risk?
Entrances, busy corridors and stairs on wet days, canteens and dining halls, kitchens, toilets, PE changing rooms and swimming pool surrounds usually carry the most risk. These are the places most likely to be wet or contaminated, and they see heavy footfall at peak times. Quiet, dry classrooms typically need far less attention.
Do schools need to test their floors if there have been no slip accidents?
An absence of recorded accidents does not mean an absence of risk, because most minor slips and near misses go unreported. Testing gives you a measurement of grip, rather than relying on the accident book. Requirements vary by setting, so check what applies to your school.
How can a school reduce slip risk without replacing its floors?
Start by measuring the highest-risk zones, then fix what the readings show. That might mean changing cleaning products or methods, improving entrance matting, or treating a surface to improve its grip. Many floors can be improved without being replaced.
How often should school floors be slip tested?
High-risk, frequently wet zones are generally tested at least annually, and again whenever cleaning products, footfall or the floor itself change. Because grip changes over time, a result from installation does not reflect today’s performance. Regular, dated readings give the clearest picture.