What are the mold resistance properties of treated wood versus composite lumber in landscape tables?

When selecting materials for landscape tables, mold resistance is a critical factor, especially in outdoor environments. Treated wood and composite lumber are two popular choices, but their performance against mold varies significantly.

Treated wood is chemically treated to resist decay, insects, and mold. The preservatives, such as copper-based compounds, create a hostile environment for mold growth. However, over time, these treatments can leach out, reducing effectiveness. Regular maintenance, like resealing, is often required to sustain mold resistance.

Composite lumber, made from wood fibers and plastic, is inherently resistant to mold due to its synthetic components. Unlike treated wood, it doesn’t rely on chemical treatments, making it a low-maintenance option. However, lower-quality composites may still harbor mold if organic materials are exposed on the surface.

In humid or wet climates, composite lumber generally outperforms treated wood in long-term mold resistance. For those seeking durability with minimal upkeep, composite lumber is the better choice. However, treated wood remains a cost-effective option if maintained properly.

Ultimately, the decision depends on climate, budget, and willingness to perform maintenance. Both materials have their merits, but composite lumber offers superior mold resistance for landscape tables in most outdoor settings.