P & H Roofing | Roofing Services in White Plains, NY 10605

Those dark streaks are often Gloeocapsa magma algae, common in our humid climate. While it can be cleaned, improper cleaning can damage shingles. We recommend a professional soft wash treatment that eliminates the algae and includes a preventative treatment to slow its return, protecting your roof's longevity and appearance.

Roof valleys are critical drainage points that endure heavy water flow, especially during our Nor'easters and spring rains. Leaks often occur due to worn flashing, cracked seals, or compromised underlayment. Our repair involves a thorough inspection to pinpoint the failure, then we replace or reseal the affected materials with high-grade, waterproof solutions to restore proper drainage.

It depends on the damage's extent, age, and location. Minor, isolated leaks or wear might only need a repair. However, widespread issues, multiple leaks, or significant aging (common on many older White Plains homes) often indicate a replacement is more cost-effective for long-term protection. We provide a detailed, honest assessment to help you make the right choice for your home and budget.