The answer to 'when to drainage system' is that a properly installed drainage system can last 20-30 years or more with regular maintenance. Drainage systems are essential for managing water flow and preventing issues like flooding, erosion, and pooling around your home's foundation. The best time to install or upgrade a drainage system is typically in the spring or fall when the weather is moderate and there is less risk of heavy rainfall.
Regular inspections and maintenance, such as clearing leaves and debris from gutters and downspouts, can help extend the lifespan of your drainage system. Over time, components like pipes, grates, and pumps may need to be repaired or replaced. It's a good idea to have a professional landscaper or drainage specialist evaluate your system every 5-10 years to identify any issues and recommend necessary upgrades or replacements.