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Are Composite Decking Boards Slippery?

When it comes to decking options for your outdoor space in the United Kingdom, composite decking has gained immense popularity in recent years. It's celebrated for its low maintenance, durability, and attractive appearance. However, one of the concerns that homeowners often have, especially in a country known for its rainy weather like the UK, is whether composite decking is slippery. In this blog, we'll explore this issue in detail and provide insights into how to ensure your composite deck remains safe even in wet conditions.

Understanding Composite Decking

Composite decking is made from a combination of wood fibres and plastic, usually high-density polyethylene (HDPE). This blend of materials creates a durable and weather-resistant decking material. Unlike traditional wooden decks, composite decks don't rot, warp, or splinter, making them an excellent choice for the UK's variable climate.

Are Composite Decks Slippery?

The slipperiness of composite decking boards can vary depending on several factors, including the brand, surface texture, and the presence of moisture or algae. Let's break down these factors:

  1. Surface Texture: Composite decking boards come in various textures. Some have a smoother surface, while others are designed to mimic the texture of real wood. Generally, the smoother the surface, the more slippery it can be, especially when wet.

  2. Moisture: Like any outdoor surface, composite decking can become slippery when it's wet. Rain, morning dew, or even spills can make the surface slick. This is not unique to composite decking and is a consideration for any outdoor flooring material.

  3. Algae and Mould Growth: In damp and shaded areas, composite decking may develop algae or mould, which can significantly increase slipperiness. Regular cleaning and maintenance can help prevent this issue.

How to Reduce Slipperiness on Composite Decking

  1. Choose Textured Boards: When selecting composite decking, consider boards with textured surfaces. These provide better traction underfoot, even when wet. Many manufacturers offer slip-resistant decking options.

  2. Regular Cleaning: Keeping your deck clean is essential. Sweep away leaves, dirt, and debris regularly to prevent build-up that can make the surface slippery. You can also use a pressure washer or specialised deck cleaning products.

  3. Apply Anti-Slip Coatings: Some anti-slip coatings or treatments are available that can be applied to composite decking to improve traction. Be sure to follow the manufacturer's instructions when using these products.

  4. Keep the Deck Sloped: Proper deck design and installation should include a slight slope away from the house. This allows water to drain off the deck, reducing the chances of standing water, which can make surfaces slippery.

  5. Use Outdoor Rugs or Mats: Placing outdoor rugs or mats in high-traffic areas can provide additional traction and make your deck safer.


Composite decking is a fantastic choice for your outdoor living space in the UK due to its durability and low maintenance. While it can become slippery when wet, there are several measures you can take to mitigate this issue and ensure the safety of your family and guests. By choosing the right textured boards, maintaining your deck, and taking necessary precautions, you can enjoy your composite deck year-round, even in the unpredictable British weather. Contact us today to find out more by clicking here.

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