A deck is a flat surface capable of supporting weight, similar to a floor, but typically constructed outdoors, often higher from the ground, and usually connected to a building. Decks can be used in a number of ways but normally are designed to extend living areas of houses, and as an alternative to stone based features such as. Now is the time to start building your deck, but there are many products that could be used as decking material. Which is the right one? Let’s go over several products that you might want to consider as your decking material.