Collins Roofing & Remodeling | Roofing Services in Dunbar, PA 15431

Those black streaks are likely Gloeocapsa magma, a type of algae that thrives in our humid Pennsylvania climate, especially on shaded roof sections. While it can be unsightly, it also retains moisture that can degrade shingles over time. A professional cleaning with the right solutions can safely remove it, and installing zinc or copper strips at the roof ridge can provide long-term prevention.

This is a common issue in Dunbar due to freeze-thaw cycles. Snow and ice can dam up in your gutters or at the roof edge, forcing melting water under the shingles. The most common culprits are compromised flashing around chimneys or vents, or ice dam damage to shingles. A prompt inspection is key to locating the entry point and preventing further water damage to your attic and interior.

Absolutely. Properly sized and installed gutter systems are your roof's first line of defense. They channel melting snow and rain away from your roof edge and foundation. In our area, we often recommend seamless gutters with adequate downspouts and extensions to direct water at least 5 feet from the house. This significantly reduces the chance of water backing up under shingles and forming destructive ice dams.