Source: br br br Timber decking is a type of construction material used to build outdoor decks and patios. This material can be manufactured using a wide variety of hard and soft wood species, depending on the desired appearance and properties of the finished structure. Timber decking gives outdoor structures a natural rustic look that cannot be achieved with metal or composite materials. Homeowners who build a timber deck will increase their available living space and create an outdoor spot for meals and gatherings.