Attractive options for deck railings that aren't overly expensive include composite rails made of vinyl, rustic looks made of repurposed wood or branches, and standard railings made of pressure-treated wood, suggests Decks.com. Composite and metal railings cost less over the long run because they are long-lasting and easy to maintain.
Transparent deck railings made of plastic or manufactured glass are more expensive than other approaches, but are particularly attractive for decks with a striking view, since they allow for greater visibility. Metal railings made of steel or aluminum are cost-effective and typically easy to install. Aluminum railings typically come with a lifetime guarantee and require very little maintenance.