Composite decks are a popular choice for outdoor flooring due to their durability, aesthetics, and low maintenance. However, this does not mean they don’t require regular cleaning to maintain their appearance, quality, and durability over time. This article outlines the best practices for cleaning and maintaining your composite deck, with a special focus on CDECK products, renowned for their quality, durability, and ease of maintenance.
How to Maintain and Care for a Composite Deck?
Initial Cleaning After Installation
During installation, it is common for dust or debris to accumulate. To ensure effective cleaning:
- Use water and a mild detergent;
- Use a soft brush to avoid damaging the surface;
- Use a pressure washer, keeping a distance of approximately 30 cm and a maximum pressure of 150 bar with a wide spray nozzle;
- Always wash along the length of the boards to preserve the integrity of the material.
Regular Maintenance for a Pristine Deck
CDECK products are made with high-quality materials and are easy to maintain. To keep your deck looking great and to prevent the buildup of residues, dust, mould, or moss:
- Perform periodic cleaning with water, a mild detergent, and a soft brush;
- Use a pressure washer following the same guidelines for distance and pressure;
- Always wash along the length of the boards.

How to Remove Stains from Your Composite Deck?
Food and Grease Stains
- CDECK Original: Act immediately to minimise absorption into the wood fibres.
- CDECK WUUDE: Its nearly impermeable coating prevents liquid absorption, but it is still advisable to clean quickly to avoid dirt embedding into the deck.
Steps to Remove Stains:
- Wash the boards with water;
- Use a non-abrasive degreaser;
- Use a soft brush.
We recommend testing a small amount of the product on a discreet area of the deck before applying it to the affected section to ensure it is safe to use.
Limescale Deposits
The hardness of water depends on the amount of calcium and magnesium salts dissolved in it through contact with rocks. Harder water tends to form limescale deposits on surfaces it passes through, such as pipes, washing machines, taps, showers, etc. Similarly, limescale deposits can also develop on CDECK over time.
Steps to Remove Limescale Deposits:
- Wash the boards with water;
- Use a limescale remover;
- Use a soft brush.
We recommend testing a small amount of the product on a discreet area of the deck before applying it to the affected section to ensure it is safe to use.
Daily Care Tips
Composite decking is a highly durable material. Over time, it is natural for small signs of wear to appear, but with proper care, the surface will remain in good condition for many years:
- Avoid dragging heavy or sharp objects across the boards;
- Protect the bases of objects in direct contact with the deck to reduce the risk of scratches or damage;
- Regularly remove leaves or other organic debris to prevent the growth of mould or moss.

Replacement and Easy Access with CDECK Fixing System
The unique and patented CDECK fixing system is not only very easy to install and uninstall but also allows individual boards to be opened. This makes it easy to access for maintenance or deep cleaning. Whether inspecting a drain, accessing a service hatch, a conduit, or performing other interventions, CDECK system ensures efficiency and convenience.
Cleaning a Composite Deck Designed to Last
Maintaining a composite deck is simple and practical. With regular maintenance and the recommended care, your deck will remain functional and in excellent condition for many years. CDECK products stand out for their durability, resistance, comfort, and ease of cleaning and maintenance.
Choose the ideal solution, take care of your deck, and make the most of your outdoor space.
For more information or clarification about our composite decks, consult our technical sheets.