What tests measure WPC’s resistance to mold and mildew?

Wood-Plastic Composite (WPC) materials are widely used in construction and outdoor applications due to their durability and low maintenance. However, one critical aspect of WPC performance is its resistance to mold and mildew, especially in humid or wet environments. To evaluate this, several standardized tests are employed.

The most common tests include ASTM D3273, which assesses surface mold growth on WPC materials under controlled conditions, and ASTM G21, which evaluates fungal resistance. These tests simulate real-world conditions by exposing WPC samples to high humidity and temperature, promoting mold and mildew growth. Additionally, ASTM D5590 measures the effects of fungal exposure on the physical properties of WPC, ensuring long-term durability.

These tests provide valuable data on how WPC materials perform in environments prone to mold and mildew, helping manufacturers and consumers make informed decisions. By adhering to these standards, WPC products can maintain their structural integrity and aesthetic appeal over time, even in challenging conditions.