How to distinguish whether outdoor flooring contains heavy metals

Wood-plastic composite (WPC) decking for outdoor use is primarily made of wood fibers and plastic (such as polyethylene or polypropylene), and may include chemical additives to enhance performance. The difference between WPC decking with and without heavy metals can be explained as follows:

 1. Composition: Heavy-metal-free WPC decking does not contain or has minimal levels of heavy metal additives, whereas WPC with heavy metals may contain lead, cadmium, chromium, and other heavy metals that can gradually be released into the outdoor environment.

 2. Environmental Safety: Heavy-metal-free decking is typically more environmentally friendly and safer for human health, especially under outdoor conditions with exposure to rain, sunlight, etc., as it does not release harmful substances.

 3. Testing Standards: Third-party testing agencies can measure the heavy metal content in decking, providing an official test report. Decking that meets environmental standards should have heavy metal levels within a safe range or below detection limits.

 4. Durability and Cost: Generally, heavy-metal-free eco-friendly WPC decking may involve higher-quality materials and manufacturing processes, which can make it more expensive. Decking with heavy metals is often cheaper but may have lower durability and safety.

When purchasing, check the product’s test reports or consult the manufacturer to confirm that the decking is free of heavy metals to ensure it meets environmental and health standards.