The answer to 'when to replace gutter installation' is that gutters typically need to be replaced every 20-30 years, depending on the material and climate. Gutters made of aluminum or galvanized steel can last 20-25 years, while copper or stainless steel gutters may last 25-30 years. Factors like weather exposure, debris buildup, and proper maintenance can also affect the lifespan of your gutters.
Over time, gutters can become corroded, cracked, or detached from the home, which can lead to water damage and other issues. It's important to regularly inspect your gutters for signs of wear and tear, and replace them when necessary to protect your home.