The life expectancy of deck boards varies widely based on the material, climate, and maintenance. Untreated wood boards typically last 10 to 30 years with proper care, while pressure-treated boards can last up to 50 years. Hardwoods generally outlast softwoods. Composite boards also tend to last longer than natural wood. Environmental factors like arid or humid climates can shorten a deck's lifespan. To extend the life of wood decking, it's important to consistently clean and seal it to protect against moisture, UV light, and insects.

PVC decking tends to be cooler than composite because the material is less dense and absorbs less heat. However, it depends on the deck’s color. A dark-colored PVC deck may run hotter than a light-colored composite deck. If you’re concerned about your deck getting too hot, it’s best to stick to a light color such as beige or gray.

Deck boards should be spaced no more than three-eighths of an inch apart. This is enough space to allow water and small debris to pass through without collecting on the surface, but not enough to create a tripping hazard. Certain materials, like pressure-treated wood, shrink over time, so they may need less space at installation.

There are a variety of second-story deck privacy ideas depending on your budget and aesthetic. For starters, you might consider fencing or tall privacy railing that masks a good portion of the open deck. A pergola or an awning can provide additional cover and shade. Outdoor curtains are an easy way to add or remove privacy at your convenience, plus they’re a wallet-friendly way to decorate your deck.