Slippery outdoor surfaces – causes & solutions

Slippery outdoor surfaces are a major safety hazard for businesses and in public spaces. Whether it’s a shop forecourt, school playground, car park or public footpath, slippery areas increase the risk of slips, trips and falls, leading to injury claims and reputational damage. However, with regular maintenance and commercial jet washing, you can keep your outdoor surfaces clean, safe and compliant with health and safety legislation.

Here’s a guide to what causes slippery surfaces and how professional jet washing can help.

What are the common causes of slippery outdoor surfaces?

There are several reasons outdoor surfaces become slippery, especially in the UK’s damp climate. Two of the main culprits are moss and algae, which thrive in shaded, damp areas, such as playgrounds, walkways and car parks. Slippery surfaces can also be the result of a build-up of dirt and organic matter (like mud and leaves), forming a slimy layer that reduces traction. Forecourts and loading bays are especially prone to slippery oil and diesel spills. If left untreated, these problems not only create a safety hazard but also cause long-term surface damage.

How can I maintain outdoor surfaces?

Routine cleaning and maintenance can prevent slippery surfaces. You should schedule regular inspections to identify problem areas early, especially during wet seasons. Prompt cleaning is vital to remove leaves, moss and dirt before they have a chance to settle. Professional jet washing is one of the best solutions that businesses and local authorities use, getting fast and effective results in every season.

What does jet washing remove?

Jet washing is one of the best ways to restore outdoor surfaces and blast away compacted layers of grime. High-pressure water jets remove moss, algae, lichen, oil, grease, chewing gum, dirt, graffiti and bird faeces without damaging the surface material. The process not only improves the surface appearance but restores grip and traction, reducing the risk of accidents. Jet washing is suitable for concrete, tarmac, paving slabs, resin-bound surfaces, patios, driveways, decking and more.

Can you jet wash playgrounds?

Yes, playgrounds can be safely jet washed when completed by professionals who risk assess the material first. Over time, playground surfaces collect moss, algae and grime, making them slippery and unhygienic for children and adults alike. Expert jet washing uses controlled water pressures and specialist cleaning agents that are safe for children and the environment. Moreover, regular cleaning helps schools and councils meet safety standards while keeping play areas bright, clean and welcoming, discouraging antisocial behaviour.

Does jet washing stop moss growth?

Jet washing effectively removes existing moss, algae and spores from the surface, helping to prevent instant regrowth. However, moss can return over time, especially in shaded or damp areas. For long-term prevention, professional cleaners can apply a biocide treatment after jet washing to inhibit regrowth and keep surfaces cleaner and slip-free for longer.

See our blog on: Westermann machine for advanced moss removal.

Get a free jet wash survey and quote

Jet Wash Surrey offers professional jet washing services across the area, coming out to Dorking, East Molesey and beyond. Contact our office to arrange a free quote.