Danville homeowners take pride in their properties, but even the most beautiful roof can develop black streaks, green patches, or thick moss. These stains are signs of algae, lichen, or mold growth caused by the area’s shaded hillsides, morning fog, and pollen. At PPWPM (Professional Power Washing & Property Maintenance), we provide professional algae and lichen treatment in Danville using a proven soft wash roof cleaning system that removes buildup safely and protects your roof for years.
Why Roof Algae and Lichen Form in Danville?
Danville’s climate is ideal for roof algae and lichen. The town’s oak trees and valley fog combine with dust from nearby highways to create a perfect environment for growth. The dark stains many homeowners see are caused by Gloeocapsa magma, a type of algae that feeds on limestone within shingles. Over time, these organisms trap moisture and slowly deteriorate roof materials. Without treatment, they can lead to leaks, rot, and costly roof replacement.Why Pressure Washing Is Not Safe for Roofs?
Pressure washing might seem like a quick fix for roof stains, but it often causes serious damage. High-pressure water strips protective granules from shingles and can break seals around flashing or vents. Many roofs in Danville use tile, composite, or wood shake materials that are easily damaged by harsh water pressure. PPWPM’s soft wash roof system cleans gently with low pressure and specialized cleaning solutions that dissolve algae, moss, and lichen without harming your roof.Our Eco-Friendly Roof Algae & Lichen Treatment Process
- Step 1: Roof Inspection – We inspect your roof for black streaks, moss, and lichen buildup, noting material type and condition.
- Step 2: Soft Wash Application – Our low-pressure equipment applies an eco-friendly roof cleaner that targets organic growth safely and effectively.
- Step 3: Root-Level Cleaning – The solution penetrates to kill spores and prevent regrowth for up to three years.
- Step 4: Rinse and Restore – A gentle rinse removes residue and restores your roof’s original color.
- Step 5: Property Protection – Landscaping, gutters, and siding are covered and rinsed to ensure no overspray or chemical contact.
Benefits of Professional Roof Cleaning
- Removes black streaks and stains caused by Gloeocapsa magma.
- Prevents roof deterioration and water damage.
- Restores appearance and improves property value.
- Enhances energy efficiency by keeping your roof reflective.
- Uses safe, biodegradable solutions that protect pets and plants.
- Backed by PPWPM’s $5,000 Satisfaction Guarantee and 500+ five-star reviews.
Frequently Asked Questions
- What causes roof algae in Danville? The mix of humidity, pollen, and shade allows Gloeocapsa magma to grow and spread across shingles and tiles.
- Will lichen or moss damage my roof? Yes. Lichen and moss trap moisture and lift shingles, causing leaks and structural wear over time.
- Is soft washing better than pressure washing? Yes. Soft washing removes algae and stains gently, without damaging roof surfaces or voiding warranties.
- How long will my roof stay clean? Typically two to three years depending on roof type, sun exposure, and maintenance frequency.
- Do you clean commercial and HOA roofs? Yes. PPWPM serves residential, commercial, and HOA properties throughout Danville and the surrounding San Ramon Valley.