In the world of home improvement and garden maintenance, few materials have endured as prominently as pressure-treated wood. Fondly (or sometimes not so fondly) remembered, the clunky decks and fences of the 70s, 80s, and 90s are often still a part of our landscape today. While these structures stand as testaments to durability, they also harbor a less desirable legacy—the use of hazardous chemicals.

Back in the day, the pressure-treated lumber commonly utilized across the United States, including northern Virginia, was infused with chemicals like arsenic to enhance resistance against insects and elements. Although effective for fortifying the wood, these toxic preservatives had a dark side, posing significant health risks to humans, pets, and the environment. Alarmingly, these chemicals were banned in Europe over fifty years ago due to these dangers.

One of the critical risks associated with old pressure-treated materials is their interaction with the food supply. Planting vegetable gardens near these materials can result in contamination, as toxins leach into the soil and ultimately enter the food chain. Similarly, anyone involved in cutting, removing, or handling these materials must remain vigilant—never burning them, as this could release harmful toxins into the air.

Fortunately, advancements in pressure treatment technology offer a safer alternative. Modern pressure-treated wood is infused with copper, a much safer preservative. Unlike its predecessors, this material does not pose a threat to humans or animals. However, a new challenge emerges when combining the old with the new. Old hardware can react adversely with the new copper-treated lumber, resulting in corrosion that could compromise the integrity of the structure. Hence, using modern fasteners and hardware is essential for any project involving new pressure-treated wood.

We recall the transition period vividly—it marked a significant shift in construction and renovation paradigms, emphasizing safety and sustainability. The introduction of non-toxic materials meant a complete overhaul of practices, encouraging a conscientious use of compatible hardware to safeguard against corrosion.

As we navigate these changes, it’s vital to remember that burning any form of pressure-treated lumber, old or new, is ill-advised. Both can release toxins when burned, which is particularly risky in enclosed spaces like campfires or barbecues.

In summary, while the pressure-treated wood of yesteryear carries warnings and hazards, the strides we have made offer peace of mind, safer structures, and an environmentally friendly approach. Embracing these changes allows us to preserve safety without sacrificing the aesthetic and functional benefits of pressure-treated wood, ensuring that decks, fences, and outdoor structures remain a staple in our lives for years to come.