I hope this posts reaches the masses. Any object on this planet that is outside will eventually need cleaning. Fences, decks, house siding, concrete, wood, vinyl siding, etc . Besides dirt, usually it will be mildew that gets on it.
Way too often I hear customers mention a salesperson of some kind that told them “fill in the blank material does not need cleaning ever”. I have heard it about vinyl siding, vinyl decking, trex, etc. The homeowners is being lied to point blank. Some materials need less maintenance than others but they all get dirty.
Pressure washing yearly or at least every 18 months is the best bet for keeping your structures looking their best. Of course different materials need different care… see comment from Trex Rep.
I am a representative of Trex and would like to comment:
Trex does not recommend the use of a power washer
and will not warranty claims on products that are
damaged while using a power-washer. Every effort
should be made to follow the Trex Care and Cleaning
guide to remove any staining prior to using a pressure
-washer.
Should you choose to use a pressure-washer, here are
guidelines to follow.
o A pressure-washer with 1500 psi or less must
be used
o A fan spray pattern to protect the Trex surface.
o The Tip should remain 12″ or farther from the decking
surface.
Pat M
Trex Company
Many people use pressure washers the wrong way. They think they are made to “power” the dirt off. In reality high pressure does more damage than good. Low pressure with proper cleaners is the key. I can see why companies would not warranty their products against pressure washers.