The best base materials for a ground-level or floating deck are typically gravel and crushed stone (also known as landscaping rocks). These options are inexpensive, provide excellent drainage, prevent weeds, and help minimize moisture buildup, which reduces shifting and rotting. For added stability and to evenly distribute the weight, you can use concrete deck blocks or pavers. While more expensive, concrete blocks and pavers offer a sturdier base than gravel or crushed stone alone.

How long it takes to install composite decking depends on the size of the decking material, the skills of the person installing the deck, the number of people helping, and how much prep work needs to be done before you can begin. Generally speaking, it takes anywhere from a few days to several weeks to build a composite deck.

PVC decking can get slippery when wet because it’s made from plastic. However, composite and wood decking can also be slippery when wet. It’s best to wear shoes with grippy soles when walking on a wet deck, no matter the material, and to be extra cautious not to slip and fall down.

Coping is the material that lines the perimeter of a pool and seals the transition between the top of the pool wall and the water. Decking surrounds the poolscape and extends far beyond the water's edge to provide a safe walking and lounging area. In short, coping is the border between the decking and the pool itself.