Smith Kerry J Roofing and Siding | Roofing Services in Reading, PA 19608

Those dark streaks are likely Gloeocapsa magma algae, common in our humid Pennsylvania climate. While it can be unsightly, a professional soft wash is the safest and most effective removal method. We avoid high-pressure washing, which can damage shingles. The treatment also includes applying a zinc or copper-based preventative strip to inhibit future growth and keep your roof looking clean longer.

Flashing rust is a serious issue here in Reading due to our freeze-thaw cycles and precipitation. Rust compromises the metal's ability to seal water out, which can lead to leaks into your attic and walls. We inspect flashing for corrosion, seal failures, and proper installation. Repair or replacement with modern, corrosion-resistant materials is often needed to prevent costly water damage and restore a watertight seal.

We recommend a professional inspection at least once a year, ideally in the spring or fall. This allows us to spot and address minor issues—like early flashing corrosion, lifted shingles from storms, or moss buildup in shaded areas—before they become major repairs. Given our local weather patterns, proactive maintenance is key to protecting your investment and avoiding emergency leaks.