Pros and cons of natural wood versus man-made composites for deck materials. As the warm weather approaches we've been getting a lot of calls from customers about building new decks. When the conversation comes to the question of what materials to use, it comes down to one question: wood or composite? The first thing to know about choosing a decking is that regardless of the material, all decks use pressure treated lumber for the framing; which is the structural part of the d