J S Roofing | Roofing Services in Ypsilanti, MI 48197

Flashing separation is common here due to our temperature swings, which cause materials to expand and contract. This can break the seal around chimneys, vents, and valleys. We fix it by carefully removing the compromised flashing, preparing the surface, and installing new, high-quality flashing sealed with durable, weather-resistant materials to prevent future leaks.

Those dark streaks are usually Gloeocapsa magma algae, which thrives in our humid climate, especially on shaded roof sections. Yes, we can safely remove them. We use a professional, low-pressure cleaning solution that eliminates the algae without damaging your shingles. We can also discuss installing zinc or copper strips to help prevent regrowth.

We recommend a professional inspection at least once every two years, and always after a major storm. Given our local issues with flashing and algae, regular checks allow us to catch small problems early—like a loose seal or early algae growth—saving you money on more extensive repairs down the line and extending your roof's lifespan.