We recommend that wood exposed to the outdoor elements be treated every other year, especially floorboards and hand rails that take the brunt of the weather.  Vertical surfaces can usually hold up for a longer period of time in between treatments.  Regular maintenance will help prevent damage to your wood that could include warping, rotting, cracking, mold growth, dirt accumulation, and ultraviolet sun damage.  In addition to being unsightly, these defects can create safety concerns due to splintering, loose spindles/handrails, rotting floorboards, and protruding nails.  We believe the best way to avoid these problems is to implement a carefully planned deck maintenance program that will keep your investment looking new and attractive.