The integral lip on these composite deck boards sheds water to keep the area beneath the deck dry for storage or additional outdoor-living space. DuxxBak is made from the same composite as the company’s GeoDeck: a blend of high-density polyethylene plastic, dried paper sludge, and rice hulls. Unlike most composites, it contains no wood flour. The manufacturer says the decking resists mold, mildew, and scratching and comes with a 25-year limited warranty. It’s available in six colors—rustic red, copper canyon, walnut, driftwood, mahogany, and cedar—and in 12-, 16-, and 20-foot lengths. Green Bay Decking, 800.804.0137,