San Lorenzo homeowners often notice dark roof streaks, green moss, or light lichen spots that spread after humid mornings or rainy weeks. These stains are caused by living organisms that slowly damage shingles and tiles. PPWPM (Professional Power Washing & Property Maintenance) provides professional algae and lichen treatment in San Lorenzo using a safe soft wash roof cleaning process that removes buildup without damaging your roof or landscaping.
Why Roof Algae and Lichen Are Common in San Lorenzo?
Located near the Bay, San Lorenzo experiences high humidity, coastal moisture, and plenty of shade from trees that drop organic debris. These factors encourage the growth of Gloeocapsa magma, a blue-green algae that causes black streaks on roofs. Over time, algae, moss, and lichen trap moisture, leading to mold growth, leaks, and weakened shingles. Homes near Hesperian Boulevard, Bockman Road, and Grant Avenue are especially prone due to shade and fog retention.Why Pressure Washing Is Not Safe for Roofs?
Pressure washing may seem like a quick way to clean roof stains, but it often causes permanent damage. High-pressure water strips away protective granules and can loosen shingles or crack tiles. PPWPM uses a soft wash roof cleaning system that relies on low pressure and an eco-friendly roof cleaner designed to dissolve algae and moss safely. This method restores your roof’s appearance and extends its life without causing damage.Our Professional Roof Cleaning Process
- Inspection – We evaluate roof material, slope, and the severity of organic growth.
- Soft Wash Treatment – A biodegradable solution is applied with low pressure to break down algae, moss, and lichen.
- Deep Cleaning – Our treatment kills spores at the root, preventing regrowth for up to three years.
- Gentle Rinse – We rinse away residue and restore your roof’s natural color safely.
- Full Protection – Gutters, siding, windows, and landscaping are covered and rinsed throughout the process.
Benefits of Professional Roof Cleaning in San Lorenzo
- Removes black streaks, stains, and discoloration caused by Gloeocapsa magma.
- Prevents leaks, mold, and shingle deterioration.
- Improves curb appeal and boosts property value.
- Restores roof reflectivity for better energy efficiency.
- Uses eco-friendly cleaners safe for pets, plants, and families.
- Backed by PPWPM’s $5,000 Satisfaction Guarantee and more than 500 five-star reviews.
Frequently Asked Questions
- What causes black streaks on my roof? They are caused by Gloeocapsa magma, an algae that thrives in humid and shaded environments like San Lorenzo.
- Can lichen or moss damage my roof? Yes. Lichen attaches to shingle granules, and moss retains moisture that leads to decay and leaks.
- Is soft washing better than pressure washing? Yes. Soft washing uses low pressure and safe cleaning agents to remove stains without harming the roof surface.
- How long will my roof stay clean? Most roofs stay clean for two to three years depending on shade, weather, and maintenance frequency.
- Do you clean commercial or HOA properties? Yes. PPWPM provides roof cleaning for homes, HOAs, schools, and commercial buildings across San Lorenzo and nearby communities.