Park chairs are designed to withstand harsh outdoor conditions, and preventing wood rot is a key priority. Manufacturers use several methods to ensure longevity. First, many park chairs are made from pressure-treated wood, which involves infusing the wood with preservatives to resist moisture, insects, and fungal decay. Additionally, protective coatings such as sealants, varnishes, or specialized paints create a barrier against water penetration. Some chairs are constructed from naturally rot-resistant woods like cedar or redwood. Proper design also plays a role—elevated legs and slatted seating allow airflow, reducing moisture buildup. Regular maintenance, including cleaning and reapplying protective finishes, further extends their lifespan. By combining these techniques, park chairs remain durable and rot-free for years.