All exterior building materials require cleaning. We recommend a basic cleaning with a composite deck cleaner or combination of soap, hot water and a soft bristle brush. Ideal times to clean are just after installation and then on a semi-annual basis (typically spring or fall is most conducive with the weather). This will help to maintain the beauty of your Trex outdoor living space.
Below is the mold bulletin from TREX:
If you would like a professional exterior cleaning company that knows how to safely clean your decking using the latest in soft wash technology handle this job for you, Roof Cleaner is the company to call in West Michigan.
Roof Cleaner. A Clean You Can See!