Slips, trips and falls on the same level are among the most common causes of injury on construction sites, and most of them are preventable with good housekeeping, tidy routes and prompt clean-up. A slip happens when there is too little grip between your footwear and the surface. A trip happens when your foot catches on something, such as a cable, a loose board or a pile of off-cuts. This guide covers the typical causes on site and the controls that go with them, and points you to HSE for the detail.
Key takeaways
- A slip is a loss of grip between footwear and the walking surface, while a trip is when your foot catches an obstacle or uneven surface.
- Poor housekeeping is one of the most common underlying causes, so keep walkways, stairs and work areas clear of materials and waste.
- Manage cables and hoses by routing them away from walkways, or by covering or raising them where they must cross a route.
- Clean up spills at once, deal with the source of any leak, and mark wet or contaminated areas until they are safe.
- Falls from height are a separate hazard with their own rules, so use our fall prevention guide for work at height.
Why slips and trips matter on construction sites
Many site injuries do not involve cranes, trenches or scaffolds. They involve someone stepping on a loose board, catching a boot on a cable or sliding on wet mud or spilled liquid. Because these accidents seem ordinary, they are easy to overlook, and that is why HSE publishes dedicated guidance on slips and trips for workplaces.
Construction sites make the problem harder. Ground levels change as work progresses, surfaces get wet or muddy, materials are delivered and moved, services run across work areas and many trades share the same space. Temporary works, lighting and signage change from week to week. A route that was safe yesterday may not be safe today.
The consequences range from sprains and bruises to fractures and head injuries. A slip or trip can also lead to a more serious fall, for example if it happens near an open edge, on a stair or while carrying something heavy. Treat housekeeping as a core part of your site safety, not a tidy-up job for the end of the week.
Common causes on site
Slips and trips usually involve a combination of factors, such as the floor surface, contamination, footwear, cleaning methods, lighting and the people involved. Applied to a construction site, the typical causes include the following.
Poor housekeeping
Waste, packaging, off-cuts, tools and materials left in walkways and work areas. This is the most controllable cause, because it depends on whether people clear up as they go. Skips and waste routes that are out of the way or overfull encourage people to leave things where they fall.
Cables, hoses and leads
Power leads, extension cables, air lines and water hoses laid across paths. They are a classic trip hazard. They also get damaged by vehicles and foot traffic, which creates a second hazard.
Uneven or damaged surfaces
Holes, loose boards, broken edges, ruts, changes of level and temporary ramps. Some are part of the ground, and some are caused by the work, for example after a trench has been backfilled or a floor has been cut.
Wet, muddy and contaminated surfaces
Rain, mud carried onto hard surfaces, spilled oil or paint, dust that turns slippery when damp, and leaks from equipment. Ice and frost are also hazards in cold weather. Contamination is often the reason people slip even where the surface itself is sound.
Poor lighting and visibility
Dim stairwells, shadows, glare and unlit areas hide hazards. Temporary lighting that is not maintained or moved as work changes can leave gaps.
Footwear and behaviour
Worn or unsuitable footwear with clogged soles, carrying loads that block your view, rushing, and being distracted by a phone or conversation. Behaviour is part of the picture, but fixing the environment is more reliable than hoping people will simply be careful.
Controls that work
The most effective controls remove the hazard rather than rely on warnings. In order of preference, think about the following. This list is general good practice, not a quotation from HSE guidance.
- Plan the work so that materials are delivered, stored and moved in a way that keeps routes clear.
- Provide safe access routes with firm, level surfaces, and keep them in good condition.
- Route cables overhead or along the edge of the work area. Where they must cross a route, use a cover or a raised route so that nobody can catch a foot.
- Use dust and spill control, and fix the cause of leaks rather than repeatedly mopping the result.
- Clean up quickly and use the right method, so the area is left dry or safe to walk on.
- Mark hazards that cannot be fixed immediately with signs or barriers, and treat that as a short-term measure.
- Provide adequate lighting, including temporary lighting in stairs, corridors and enclosed areas.
- Make sure workers wear footwear suitable for the site and the surface, and replace it when it is worn.
HSE's construction safety topics pages provide further guidance on specific activities and hazards. Check them and your own site rules for the standard that applies to your work.
A practical housekeeping routine
Good housekeeping works when it is part of the job, not an occasional event. A simple routine looks like this.
| When | What to do |
|---|---|
| Start of the shift | Walk your area and check routes, stairs, access points and lighting. Report anything that cannot be fixed straight away. |
| During work | Clear waste as you go and put it in the right skip or bin. Store materials where they will not block routes. |
| After deliveries | Check that new materials are stacked safely and have not blocked walkways. |
| After rain or frost | Check surfaces, clear or treat slippery areas, and review whether routes are still safe. |
| End of the shift | Leave the area tidy, with tools stored and cables put away or secured. |
Quick checklist for your own work area:
- [ ] Walkways and stairs are clear of materials and waste.
- [ ] Cables and hoses are not lying across routes.
- [ ] There are no holes, loose boards or unmarked changes of level.
- [ ] Spills have been cleaned up and wet areas marked.
- [ ] Lighting is adequate for the route.
- [ ] My footwear is in good condition and suitable for the surface.
Slips and trips compared with falls from height
This article is about falls on the same level, caused by slipping or tripping. Falls from height, from scaffolds, ladders, roofs and edges, are a different category with their own legal requirements and controls. They often cause the most serious injuries on construction sites. Our fall prevention guide covers that topic. The link between the two is real, though: a trip near an unprotected edge can become a fall from height, so good housekeeping around edges and openings is doubly important.
Welfare matters here too. Good welfare facilities, including somewhere to clean and dry your boots, help reduce the amount of mud and water carried around the site. See our site welfare facilities guide for more.
Practice check
These two questions are original and written for this site. They are not official CITB questions and not an official result.
Question 1. You see a power lead running across a main walkway. What is the best way to deal with it?
- A. Step over it and carry on.
- B. Put up a sign and leave the lead where it is permanently.
- C. Reroute it, or cover or raise it so nobody can catch a foot, and tell your supervisor if you cannot fix it.
- D. Tape it to the floor with a single strip.
Answer: C. The better control is to remove the hazard from the route. If you cannot, report it so it can be managed.
Question 2. Which of these is a slip hazard rather than a trip hazard?
- A. A pile of off-cuts in a doorway.
- B. A spilled liquid on a smooth floor.
- C. A raised edge on a board.
- D. A hose across a walkway.
Answer: B. A slip is a loss of grip on the surface, so contamination on a smooth floor is a slip hazard. The other options are objects or changes in level that catch a foot.
For more practice, see our free practice questions and the CITB HS&E test practice page. This site is independent and not affiliated with CSCS or CITB.
FAQ
What is the difference between a slip and a trip?
A slip happens when there is not enough grip between your footwear and the surface, often because of wet, muddy or contaminated floors. A trip happens when your foot hits something, such as a cable, an off-cut or an uneven edge. Both can lead to a fall.
Whose job is housekeeping on a construction site?
Everyone's. Employers and the principal contractor should plan the work and provide the arrangements, such as skips and clear routes, but each worker is expected to keep their area tidy and report hazards. Check your site rules for who is responsible for specific tasks.
What should I do if I cannot fix a hazard straight away?
Make it safe if you can do so without risk, for example by barriering the area, and tell your supervisor straight away. A sign or barrier is a short-term measure until the hazard is removed. Do not simply walk past and assume someone else will deal with it.
Where can I find official guidance on slips and trips?
HSE publishes guidance on slips and trips, and it also has construction safety topics pages. Use those and your site's own rules for the current standards, rather than relying on a general summary. Our safety guides hub points to related topics.
Sources
Independent guide, not affiliated with, authorised by, approved by or endorsed by CSCS or CITB. Last updated 2026-10-08.