Most metal decking is powder coated aluminum. This material won't splinter, rot, or rust. It is very strong and lightweight and usually is covered under a warranty. Some systems are installed using interlocking tongue and grooved panels to provide a water tight roof for below the deck. Some people are concerned about how hot metal decks can be on bare feet, but powder coated aluminum is actually cool to the touch. Metal decking usually has a grooved surface to provide a greater slip resistance. There are many colors available that will allow you to match your house siding.
There are a wide variety of metal deck railing options. The most basic system involves installing powder coated metal balusters into a wood railing. This offers a unique appearance and cuts down on maintenance. These railings are easy to install using mounting balls that attach directly to the wood top and bottom rails. There are also complete metal railing systems composed of powder coated aluminum, stainless steel, and iron. These systems are sold as kits and as preassembled panels. Metal railings are strong and durable. There are a variety of colors and styles available.