LifeTime Lumber decking is made with polyurethane mixed with mineral ash recovered from power plants. It's fire- and mold-resistant, impervious to termites and dry rot, and will not split or fade, according to the firm. The decking cuts and fastens like wood, and features a redwood wood-grain. The 2x6 deck boards are rated for 24-inch-on-center joists spacing. 877.285.4338.