Composite Decks
Frequently Asked Questions
How do you clean composite decking?
With a mixture of either soft washing, pressure washing, or a bucket and a soft bristle brush. Each brand and model has different cleaning instructions, so we always check with the individual manufacturer and ALWAYS do a test spot first in an inconspicuous area.
Can I Use Bleach on a Trex Deck?
Yes. However, the use of Sodium Hypochlorite may lighten the color of the deck. Always perform test spots before cleaning. Start with a light mixture and work up to only the strength required to clean.
Is it safe to use high pressure on a composite decking?
Not Always. Each manufacturer has guidelines on the maximum pressure that their decking material should be cleaned with. Follow manufacturer’s guidelines to insure you are not going to cause damage
Will pressure washing/soft washing void the warranty?
It absolutely can if the cleaning process is outside of their recommended guidelines. Any damage that occurs when outside of the company's guidelines can and will void their warranty.
The recommended process for cleaning composite decking varies
Below are the types of composite decking we have cleaned and a brief explanation of the recommended cleaning process for each type of composite deck material
If you would like to see the complete maintenance and care guides from each company click on the name of your type of decking
Max PSI: 3100 (No Power washing for older porous Trex)
Bleach: Yes*
Recommended: The use of bleach may lighten the color of the decking.
Max PSI: 1500 for rinsing only
Bleach: No
Recommended: Sodium Metasilicate is a recommended alternative
Max PSI: 2500 @ 12" above decking
Bleach: No
Recommended: Laundry detergent and a soft bristle scrub brush.
Max PSI: No Pressure Washing
Bleach: No
Recommended: Laundry Detergent
without Bleach is Recommended
Max PSI: 1000PSI
Bleach: Yes
Recommended: Oxalic Acid and Phosphoric Acids also ok for cleaning
Max PSI: 2500 @ 12" above decking
Bleach: Yes
Recommended: PW not recommended if mold or mildew is present on deck
Max PSI: 1800with a 20 degree nozzle.
Bleach: No
Recommended: Lacquer thinner and CLR can also be used for stubborn stains
Max PSI: 1300 @ 10" above decking
Bleach: Yes
Recommended: allow to age 3-6 months before any cleaning; Some products can lighten color of surface