Superior Roofing | Roofing Services in Salisbury, MA 01952

Those black streaks are algae, often called Gloeocapsa magma, which thrives in our humid, coastal climate, especially on north-facing roof slopes. It's not just cosmetic; over time, it can degrade your shingles. We don't just power wash it, as that can damage the granules. Our process involves a gentle, EPA-approved algaecide treatment that safely eliminates the growth and includes preventative measures to help keep it from returning quickly.

This is a very common issue here. Ice dams are a primary culprit—melting snow refreezes at the eaves, creating a dam that traps water which then seeps under the shingles. Other causes can be compromised flashing around chimneys or vents, or damage from winter debris. Our inspection focuses on your attic's ventilation, insulation, and the condition of your roof's critical sealing points to find the exact entry point and recommend a targeted repair.

Given our exposure to nor'easters, heavy snow, salt air, and summer humidity, durability and wind resistance are key. We recommend and install high-quality architectural asphalt shingles with a strong wind warranty, proper synthetic underlayment for an extra moisture barrier, and corrosion-resistant metal flashing. For homes near the coast, we also discuss algae-resistant shingle options to combat those common black streaks effectively.