A wood deck can be subjected to tough weather conditions. Deck floors are subjected to the excessive friction caused by heavy foot traffic. Because the flooring and tops of the hand rails are horizontal surfaces, they are more exposed to harmful UV rays and moisture than the vertical surfaces of the deck. This constant moisture followed by drying out, along with fluctuating temperatures causes the wood to expand and contract almost daily. This constant swelling and shrinking can result in cracking, splitting, and splintering.
To prevent damage to the wood, it’s necessary to block out the sun’s damaging UV rays and to prevent moisture from penetrating the wood. Applying a quality deck stain to the wood is the best level of protection. Deck stains do require maintenance every couple of years but you’ll get many more years of life out of your deck.