When furnishing a large park, community garden, or commercial space, finding the most cost-effective material for benches is about balancing initial price with long-term durability and maintenance. The true "cost-effectiveness" is measured over decades, not just at purchase. For large quantities, these materials typically offer the best value.
Pressure-Treated Pine is the classic, budget-friendly champion. Its upfront cost is low, and modern treatments effectively resist rot and insects. While it requires periodic sealing or staining, its proven track record and easy repair make it a top contender for sheer affordability in bulk.
Recycled Plastic Lumber is a low-maintenance star. Made from post-consumer plastics, it won't rot, splinter, or need painting. Its higher initial cost is offset by near-zero upkeep over a lifespan of 20+ years. It's ideal for areas where maintenance access is difficult.
Precast Concrete offers unparalleled permanence. The unit cost for simple slab or minimalist benches is competitive, and they are virtually indestructible against weather and vandalism. Installation requires more labor, but you'll likely never replace them.
For a balance, consider Powder-Coated Steel frames with wooden slats. The steel provides a long-lasting structure, while replaceable wood slats allow for easy, inexpensive repairs decades down the line.
The verdict? For absolute lowest initial cost: Pressure-Treated Wood. For lowest lifetime cost with minimal care: Recycled Plastic. For maximum permanence in high-traffic areas: Precast Concrete. Always factor in your local climate, expected use, and maintenance budget for the final, most cost-effective choice.