One thought on “Why do my gutters still have black streaks on them?

  1. Arti says:

    We often receive calls and e-mails from customers who are puzzled by the appearance of black streaks on their gutters. After all, when you invest in having your home’s exterior cleaned, you expect it to be spotless. Those black streaks are alarming. It’s easy to know why seeing the streaks would be cause for alarm.

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