Is Composite Decking Slippery When Wet?

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is composite slippery when wet

In short, yes. Any surface wet enough with most liquids or alcohol will be slippy. That said, good-quality composite decking boards that are produced to high standards are specifically developed with anti-slip properties built-in (not slip-proof). Nevertheless, care should always be taken with any wet surface underfoot.

When building a patio or a deck, our main priority is safety first. Especially if you’re planning to install a luxurious outdoor living and entertainment space in your garden. A slippy deck can cause accidents. Since we are all concerned about our friends and family’s safety, Ultra Decking wants nothing but the best. The best decking materials are not only beautiful but safe as well. For this reason, we look for nothing but the best and safest decking materials. 

The best quality decking materials are not only beautiful but safe. Look for nothing but the best and safest Wood Plastic Composite (WPC) decking materials. You get the durability that plastic gives coupled with the aesthetics of wood, all rolled into one of the safest decking materials available.
Ultra-Decking composite boards feature anti-slip coating or textured surfaces to increase friction. More friction reduces slipping.

Composite decking is not prone to splintering, can withstand harsh weather, and does not need a lot of maintenance.

Even if your composite decking is wet, the chances are that it’s not slippy. However, there are times when your composite decking can be slippy. Here are some of the situations that can cause your composite decking to be slippy.

Reasons why Your Composite Deck Might Be Slippery


Generally, composite decking materials are not as slippy when compared to PVC and wood. But sometimes, it can be. Knowing the reasons why they may be accident-prone can help you prevent any injuries. If you know why decking becomes slippery, you can take countermeasures to make it safer for you and your family. Here are the top reasons why composite decking becomes slippery over time.

Due to Debris and Dirt

As time passes, fallen leaves and dirt can accumulate on your patio. Leaving them for long periods can pose a safety problem for you and your family. It’s not only a matter of uncleanliness but also of moulds. The main reason decking becomes slippery is the growth of mould and fungus. While these can’t naturally grow on your composite decking, they do grow on fallen leaves, pollen, and debris. When left on your patio, the moulds that form from these can transfer into your decks. 

  • Winter Season can cause your decks to be slippery, no matter what the materials used to make them. Composite decks are not slippery even when there is water on the surface. The problem, however, is when there is an accumulation of both ice and water on your composite decking. Aside from being the cause of accidents, ice and its removal can cause some damage to your patio. 
  • Non-anti slippery composite decking. If your composite decking is quite old, the chances are that they are slightly slippery. Older generations of composite tend to absorb moisture faster, leading to the development of moulds and moss.
  • Use non-slip rugs. If you have done maintenance and care not to make your floor slippery, and it still is, you can use some rubber rugs and mats instead. It’s a big help during winter and rainy seasons when floors are usually wet. 

Ways to Help Prevent Your Deck From Becoming Slippery

Always keep your composite decking clean. Remove fallen leaves, pollen, dirt and debris from your deck. These can cause the growth of mould and fungi. If you observe spots or stains, immediately scrub them. Although composite decking does not absorb moisture, any surface water can still be a breeding ground for mould and algae.

*See Ultra Decking’s section on cleaning composite decking.

Keep Your Composite Decking Dry

Moisture can accelerate mould growth. Keep your composite decking dry during winter. It will decrease the likelihood of someone slipping and better protect your deck. If you have ice or snow accumulating on your deck, make sure to use non-abrasive removal methods.

Ensure Proper Drainage of the Decking

When correctly installed composite decking should allow for the proper drainage of rainfall. Keep the gaps or spaces between the boards clean to allow water to flow to the ground easily. Pooling of water on the deck surface can serve as a breeding ground for mould and algae.

Consider using Grooved Decking Boards

If you have plans to build a new deck or replace your old decking, consider purchasing textured composite decking boards. Boards with grains or better still, choose boards with grooved or textured surfaces. Embossed and grooved composite decking offers better friction, helping to improve slip resistance.


is composite decking slippery


Keep your composite decking clean to reduce slipping. Do a thorough deep clean at least twice a year. Being low maintenance does not mean, no maintenance. Ensure the correct installation of your composite decking has been performed to the manufacturer’s guidelines. Pay close attention to drainage and keep the decking area dry.

*For more help and information on all aspects of composite decking installation and maintenance, click here.


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