Trex decking looks great from the moment it’s installed, but over months, it gradually accumulates dirt, dust, grime and debris. All of this needs to be removed, preferably two or three times a year, to keep your deck looking its best.
What Time of Year Should You Clean a Trex Deck?
Mid-spring and mid-fall are the two best times of year to clean Trex decking, because they offer ideal temperatures for the job.
Winter tends to come with hard freezes, and a sudden cold snap straight after you clean the decking can render it very slippery or even cause damage. Calcium chloride or rock salt can be used to melt the snow and ice from the deck surface.
Summer temperatures may be too hot for many people to perform a deck cleaning job. If pollen counts are high or there’s dust build up during the summer, consider rinsing your deck off with warm water from the garden hose in the early morning or evening hours to beat the heat.
Removing Mildew and Debris
To begin cleaning Trex decking, simply remove everything on it, from seating to barbecues — and don’t forget kids’ toys. This is also a good time to clean outdoor patio furniture, especially the seat covers, since you’re moving everything anyway.
Give the decking a good sweep to remove leaves, soil, and other surface debris. A soft bristle brush is usually the best option, as it minimizes the risk of scratching the deck surface. It also removes finer debris from the embossed pattern than other types of scrub brushes might.
Next, rinse the deck with warm, soapy water, gradually working the water and soap into the grain. Use a clean soft-bristle brush to do so. You can use a slightly tougher brush if the mildew and grime on your deck is particularly stubborn, but avoid brushes with metal bristles such as paving brushes, as these can permanently scratch and scuff the Trex surface.
Finally, spray the deck with a garden hose. If dirty water is left to dry, it can leave a film that makes your decking look duller, so ensure that you get rid of all the soapy water. It’s usually best if you work systematically up and down each board and use a wider spray that’s 2 to 3 inches wide when it hits the board.