Cleaning Composite Decking — Pro Tips from a Power Washing Company

At Power Wash Unlimited, we know composite decks are a smart investment for property owners. They’re durable, low-maintenance, and long-lasting. But like any outdoor surface, they still need regular cleaning to prevent stains, mildew, and grime buildup.

Here’s our expert advice on cleaning composite decking the right way.

Start by removing all furniture, planters, and grills. Sweep the surface thoroughly to clear away dirt and debris. This simple step helps prevent scratches during cleaning.

Rinse the deck with low-pressure washer. Be careful — too much pressure can damage the surface. We recommend using a fan-tip nozzle. Always spray with the grain of the boards to maintain their finish.

Apply a composite-safe deck cleaner to lift dirt and organic growth. Let the solution sit for 10 to 15 minutes. This gives it time to break down surface grime and mildew.

Next, scrub the deck gently with a soft-bristle brush. Focus on shaded or high-traffic areas. Rinse thoroughly with clean water before the cleaner dries. This prevents streaks and residue.

Let the deck dry completely before replacing furniture. For best results, we suggest cleaning composite decks twice a year — once in spring and once in fall. In humid areas, consider a mid-summer cleaning to prevent mold growth.

Want to skip the hassle? Power Wash Unlimited specializes in safe, professional deck cleaning. We use the right tools and techniques to restore the beauty of your composite deck without causing damage.

Call us today for a free over the phone estimate. We are here to help and provide you with all the information you will need to make a well informed choice on what company to hire. We are licensed & Insured and have all the correct machines and tools to get the job done right.