Wood is the most affordable deck railing in terms of the initial cost. However, ongoing maintenance needs from repairing broken top and bottom rails, endless painting or staining needs, and cleaning costs make it one of the most expensive deck railing materials over its lifetime. Vinyl deck railings are similar in initial costs to wood. Still, since it’s virtually maintenance-free, it will be nearly the only expense associated with vinyl deck railings in its lifetime. Aluminum railings are also an affordable option with little ongoing maintenance needs. Since it won’t rust like wrought iron, you won’t have to worry about finding ways to remove the corrosion.