Trex, TimberTech and DuraWood EX come with 10-year warranties, while ChoiceDek and DuraWood PE are backed for 20 years. During construction, sawdust and shavings must be collected in a drop cloth because they aren't biodegradable. Composite lumber weathers to a light gray and can be painted or stained, though protective sealers aren't required. Use galvanized screws. They create a low-maintenance deck that needs no sealers or finishes and is free of splinters and cracks.
Planks have good spanning ability and resist UV rays if treated at the factory.
Fasteners can be completely hidden once planks are installed. These systems are relatively expensive. Vinyl can fade and get brittle with age unless specially treated at the factory, and all vinyl eventually loses its gloss. Sawdust isn't biodegradable, so it must be collected in a drop cloth. Kroy deck planks come 8 in.