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Warranty & Care

Warranty and Care

All exterior building materials require cleaning. We recommend basic cleaning witha composite deck cleaner or a combination of soap, hot water, and a soft bristle brush at the time of installation and semiannually (typically spring and fall) after the installation. This will help to maintain the beauty of Trex® decking, fencing, and railing.

Problem Solution
Dirt and Debris
  • Clean deck to remove dirt and debris. Soap, hot water and a stiff bristle brush are all that is needed.
Chalk Markings
  • All colored chalk lines are permanent except white. We suggest using white chalk or baby powder. Scrubbing the area with hot soapy water with bleach may dislodge some of the chalk.
Visible Mill Markings
  • The mill markings on the side of Trex decking boards are required by building codes. With careful installation, most mill markings can be hidden. Visible mill markings can be lightened with acetone.
Water Spots/Leaf Staining/Wood Tannins
  • Tannin leaching occurs in Trex and all wood based products naturally. Allow for at least 16 weeks of normal weathering. This process may be hastened through the use of a product containing oxalic or phosphoric acid.
Pigment Staining
  • During the weathering process, a small amount of surface pigmentation may wash off of the Trex surface, which may discolor neighboring surfaces. Remove with common rust cleaner.
Ice and Snow
  • Calcium chloride or rock salt, available in many home centers, will melt ice on Trex decking. Rinse off when first practical.
Rust Stains, Ground-In Dirt and Grime
  • Use a cleaning product containing oxalic or phosphoric acid base to lighten or remove the rust or dirt. Product may need to sit on stain 10-15 minutes.
Oil and Grease Stains
  • Scrub in a household-degreasing agent as soon as the stain occurs. Rinse with hot water. For more severe stains call 1-800-BUY-TREX.
Berries and Wine Stains
  • Mix bleach into hot water according to the bleach-packaging label. Scrub the stain lightly and rinse thoroughly. The stain may not disappear entirely.
Ink Stains
  • Inks may be permanent. However, the stain may be lightened by scrubbing with hot soapy water. Rinse thoroughly.
  • Use conventional deck washes or cleaners that contain sodium hypochlorite (bleach) and detergent (refer to Mold Technical Bulletin).
  • Periodic cleaning of your deck, even if it appears clean, is important to prevent the build-up of pollen/debris that can cause mold.
Pressure Washer
  • Trex does not recommend the use of a pressure washer. The use of a pressure washer with a greater than 1,500 PSI and/or applied closer than 10" from the deck surface could damage the decking surface and result in a loss of warranty coverage.
  • Trex does not recommend sanding. Sanding will change the appearance of the surface of Trex material.