CDECK composite decking is known for being easy to live with, and it is. But low maintenance does not mean maintenance-free. This guide covers everything you need to know: routine cleaning, using a pressure washer, treating stains and limescale deposits, products to avoid and how often to clean your deck.
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Cleaning CDECK composite decking only requires a few simple essentials:
Yes. A pressure washer is actually recommended, as long as you follow a few simple guidelines:
Diagram: minimum 30 cm distance when using a pressure washer
To keep your deck looking its best over time, follow these four simple steps:
In most cases, that is all you need to keep your deck looking good.
The best approach is to act quickly: the sooner a stain is treated, the easier it is to remove. Here is what to do depending on the type of dirt or stain:
| Situation | What to do |
|---|---|
| Everyday dirt, dust, leaves and moss (decking turning green) | Water + mild detergent |
| Food residue, grease, wine and drinks | Water + non-abrasive degreaser |
| Limescale deposits (whitish marks) | Water + non-abrasive limescale remover |
In every case, scrub with a soft brush or use a pressure washer in the direction of the boards. Always test any cleaning product on an inconspicuous area before applying it to the entire deck.
If a grease stain remains after routine cleaning, the recommended method depends on your CDECK range:
In areas with hard water, whitish limescale marks may appear on the surface. These can be removed easily without damaging the boards.
Composite decking is not timber, so it should not be maintained in the same way. Avoid:
There is no fixed cleaning schedule. Clean your deck whenever dust, leaves or debris begin to build up.
For a deeper clean or to access the substructure beneath the boards, the Quick-Fix® system allows each board to be removed and refitted individually.
Beyond regular cleaning, a few simple precautions will help keep your deck looking its best for longer:
No. Regular sweeping and an occasional wash with water and a mild detergent are enough. No varnish, wood stain or saturating treatment is required.
For routine cleaning, use water and a mild, pH-neutral detergent. For grease stains, use a non-abrasive degreaser; for limescale deposits, use a non-abrasive limescale remover. Avoid abrasive, chlorine-based or acidic products, and always test any product on a small, inconspicuous area first.
Yes. Use a wide fan-spray nozzle, keep it around 30 cm from the surface, use a maximum pressure of 150 bar and always work in the direction of the boards.
No. Composite is not timber and does not need to be nourished or treated. Wood stain, saturating treatments and colour restorers should not be used.
Wash it with water, a mild detergent and a soft brush — or use a pressure washer — always working in the direction of the boards, then rinse thoroughly with clean water.
Yes. The Quick-Fix® system allows each board to be lifted and refitted individually, without dismantling the entire deck.