The answer to 'why is my gutters water stains' is that water stains in gutters are often caused by debris buildup, improper gutter installation, or a lack of regular gutter cleaning and maintenance. Over time, leaves, twigs, and other organic matter can accumulate in the gutters, preventing proper water flow and leading to water stains on the exterior of the gutters.
Another common cause of gutter water stains is poor gutter installation or damage to the gutters, which can allow water to leak out and run down the exterior of the gutters, leaving unsightly stains. Regular gutter cleaning and inspection can help prevent these issues, but in some cases, the gutters may need to be repaired or replaced by a professional roofing contractor.