Wooden swings are susceptible to rotting, which is caused by exposure to UV rays, heavy winds, rain and other weather elements. Rotted wood in swings and swing sets can lead to broken beams, joints and seats, splinters and an overall weak construction. Kids Creations suggests that swing sets constructed from redwood lumber are more durable and last longer than those made of low-quality woods because redwood is naturally resistant to decaying and splintering.
Iron swing sets are more durable than plastic models, but they are susceptible to eventual rusting, which, like the rotting of wood, is caused by winds, rains and UV rays. As the iron erodes because of contact with weather, elements will rust, which will make the metal weaker, porous and more-easily broken. The results can be seen as orange-brown patches in iron pieces as well as beams, bars and seats that either bend or break when subjected to weight.
Wooden and iron swings each have their own maintenance requirements, which will help get more life out of your playground equipment. Planet Playgrounds suggests that with proper maintenance, iron swings generally have a longer life span than their wooden counterparts, and maintenance requirements are generally little more than the occasional tightening of bolts, ensuring it is still stable and coating iron pieces with paint to protect them from rust. Wooden swings require more frequent inspections for broken or weak pieces, loose screws or bolts and areas where the sealant needs to be reinforced.
An obvious difference you must consider when choosing between an iron or wood swing set is how it will look in your yard or outdoor space. Planet Playgrounds notes that wooden swings offer a more natural appearance and may look more appealing in some outdoor spaces. Iron swing sets, which can be painted almost any color you choose, look more modern and streamline, and might look better in well-manicured parks and lawns.