Have you noticed vertical dark, dirt-like lines running down your gutters? If so, this is called tiger striping which means your gutters are stained. You may now be wondering why you have stained gutters to begin with and how it even happens. Stained gutters occur quite easily and simply. The dirt, pollen, pollutants, and petroleum-based run-off from your home’s roof drips down and attaches to water or dew droplets that develop on the lip of your gutter. After a while, this can result in build-up and staining which can then cause tiger striping.
