The lifespan of sign boards depends on various factors, including the materials used, the location and environmental conditions, and the maintenance it receives. For example, a signboard made of durable materials like metal or high-quality vinyl may last for many years, even in harsh outdoor environments. On the other hand, sign boards made of cheaper materials like cardboard or low-grade vinyl may deteriorate much more quickly. Proper maintenance, such as regular cleaning and upkeep, can also help prolong the lifespan of a signboard. Generally, a well-made and properly maintained sign can last anywhere from several years to a decade or more.