Cleaning and caring for a composite deck is comparatively simple. This is one of the aspects of ownership that appeals to many people. While wood decks require a periodic stripping and refinishing, composite decks require a simple cleaning on a regular basis to ensure a long-life.

It is important to perform the cleaning and maintenance regularly though and as soon as the deck is dirty if possible. Ensuring that your composite deck remains free of debris and mold can help the durability and beauty of the deck. Composite lumber is the combination of wood products such as sawdust, wood flour, etc. with plastics to create a sort of "plastic wood." The result is a product that can withstand the elements without the need for any additional coating. Composite lumber provides your deck with durability that has gained favor in decking with many companies offering composite deck options.

The most basic care that should be performed on composite lumber decking is sweeping the deck to clear it of debris. You might also spray the deck with a hose for the same purpose, but take care not to use powerful pressure washers since pressure washing may actually harm your deck. Because of the simplicity of sweeping you may want to do this on a weekly or monthly basis depending on what accumulates on your deck and how much. The next cleaning method is a bit more involved, but really no more difficult than mopping a floor. You'll need a scrub brush and a household cleaner. Since it is outside, it's recommended that you use something environmentally friendly and dispose of your cleaning solution properly.

For general maintenance cleaning you may be able to use water alone or a soap of some sort. Apply the solution to the deck and allow it to soak into any grime. Next scrub the area with your brush and lastly rinse with clean water. You may want to clean a section at a time to ensure that the solution does not dry before you are able to scrub and rinse the entire deck.

This cleaning method works for Trex and most other brands of composite decks. If there is a difficult stain that can't be cleaned with these standard methods you can attempt using a specialized cleaner.  Some examples of cleaners that you may use are degreasers, bleaches, and other specialized cleaners that you probably already have in your house. These can often be mixed into a cleaning solution of water and the cleaner (don't mix cleaners). It is recommended that you use these sparingly and only on problem areas. After using these on the problem areas make sure you rinse thoroughly.

Prevention is best and immediate cleaning of debris and other things will help ensure that mold and stain do not take a hold on your deck. Also, be aware that you should not sand your composite deck and that most scratches will often blend back in to the material after a few weeks.