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What is the Best Way to Clean a Composite Deck?

The best way to clean a composite deck involves a simple three-step process: sweeping away loose debris, applying a gentle or specialized eco-friendly cleaner, and rinsing the surface. Because composite materials like TimberTech are designed to be low-maintenance, they typically do not require heavy scrubbing or high-pressure washing.

Professional guidelines suggest the following for maintaining composite surfaces:

  • Use soft-bristle tools and brushes to clean grooves where pollen and mildew may trap.
  • Avoid high-force pressure washing, which can etch or damage the protective caps of the boards.
  • If using a power washer, it should be set to a low-pressure range of 1200-1500 PSI with the nozzle kept at least 6 inches from the surface.
  • Apply UV inhibitors or specialized sealants during post-cleaning care to prevent fading and increase moisture resistance.

While wood decks often require biannual attention, composite decks generally only need this light cleaning once a year, typically in early summer, to maintain their appearance and durability.

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