Most outdoor decking is made from either wood or composite materials. Both have their advantages and disadvantages, but in general, wood decking is more susceptible to wear and tear than composite decking. With proper care and maintenance, a wood deck can last for 15-20 years, while a composite deck has a lifespan of 25-30 years. Of course, the actual lifespan of your deck will depend on a number of factors, including the type of wood or composite material used, the climate in your area, and how often the deck is used. With proper care and maintenance, however, you can enjoy your outdoor decking for many years to come.