Yes, absolutely! The wood used in most public park benches is specifically treated to resist insect damage, rot, and weathering. This is crucial for public furniture that must withstand constant outdoor exposure.
The most common method is pressure treatment. Here, lumber is placed in a pressurized tank where preservative chemicals are forced deep into the wood fibers. These chemicals, like ACQ (Alkaline Copper Quaternary) or copper azole, are toxic to termites, carpenter ants, and wood-boring beetles, while also fighting fungal decay. You can often identify pressure-treated wood by its slight greenish or brownish tint and characteristic stamp or end tag.
Some benches use naturally insect-resistant woods like cedar, redwood, or tropical hardwoods (e.g., ipe). These contain natural oils and compounds that deter pests. While durable, they often come at a higher cost.
For long-term protection, maintenance is key. Even treated wood benefits from periodic sealing or staining to protect against moisture, which can lead to vulnerabilities over time. So next time you relax on a park bench, you can appreciate the science and treatment that goes into making it durable and long-lasting for everyone to enjoy.