How does the lifespan of polyethylene compare to wood or metal in outdoor sculptures?

When choosing materials for outdoor sculptures, longevity is a key consideration. Polyethylene, wood, and metal each have distinct lifespans and performance characteristics in outdoor environments.

Polyethylene is a synthetic plastic known for its exceptional durability and resistance to weathering. Unlike wood, it doesn’t rot, warp, or attract insects, and unlike metal, it doesn’t rust or corrode. High-density polyethylene (HDPE) sculptures can last for decades with minimal maintenance, even in harsh climates. UV-resistant treatments further extend their lifespan.

Wood, while aesthetically pleasing, is vulnerable to moisture, fungi, and pests. Even treated wood may degrade within 10–20 years outdoors unless meticulously maintained. Metals like steel or bronze are more durable but can corrode over time unless coated or alloyed for weather resistance. Stainless steel and bronze sculptures may last 50+ years but often require upkeep to prevent tarnishing or rust.

In summary, polyethylene offers a balance of longevity and low maintenance, making it a practical choice for outdoor sculptures compared to traditional materials like wood or metal.