The lifespan of artificial marble on outdoor wall coverings depends on various factors such as the quality of the material, the installation process, and the local weather conditions. Generally, well-maintained artificial marble can last for many years without significant deterioration. However, exposure to harsh weather, direct sunlight, and environmental pollutants can cause fading and discoloration, cracks, and other damage over time. To ensure the longevity of artificial marble on outdoor wall coverings, it is important to use high-quality materials, follow proper installation procedures, and regularly clean and maintain the surface.