San Leandro’s coastal weather, tall trees, and year-round humidity create ideal conditions for algae, moss, and lichen to grow on rooftops. These unsightly black streaks and green patches are not just cosmetic issues. They are living organisms that feed on your roof and cause long-term damage if left untreated. PPWPM (Professional Power Washing & Property Maintenance) provides expert algae and lichen treatment in San Leandro using a safe soft wash roof cleaning process that removes buildup while protecting your roof’s structure and appearance.
Why Roof Algae and Lichen Are Common in San Leandro
Homes in San Leandro experience coastal fog and high moisture levels, especially in shaded neighborhoods near Bayfair, Broadmoor, and Estudillo Estates. These conditions allow Gloeocapsa magma, a type of blue-green algae, to thrive on asphalt shingles and tile roofs. Over time, this algae creates black streaks that absorb heat and weaken roofing materials. Moss and lichen worsen the problem by trapping moisture, which can lead to rot, leaks, and reduced energy efficiency.Why Pressure Washing Can Damage Roofs
While pressure washing might seem like a quick solution for roof stains, it can cause significant damage. High-pressure water removes protective granules from shingles and may crack tiles or lift flashing. The result is often costly repairs and a shortened roof lifespan. PPWPM uses a gentle soft wash roof method that relies on low pressure and an eco-friendly roof cleaner to safely remove algae, moss, and lichen at the root. This method is approved by leading roof manufacturers and ensures long-lasting results.Our Professional Roof Cleaning Process
- Comprehensive Inspection – We evaluate your roof type, slope, and extent of algae and lichen growth before cleaning begins.
- Soft Wash Application – Low-pressure cleaning with biodegradable detergents that break down organic buildup safely.
- Deep Treatment – The solution penetrates spores and prevents regrowth for up to three years.
- Controlled Rinse – We rinse with gentle water flow that preserves shingles, tiles, and protective coatings.
- Full Property Protection – Landscaping, gutters, and siding are covered and rinsed for complete safety during the process.
Benefits of Professional Roof Cleaning in San Leandro
- Removes black streaks and roof stains caused by Gloeocapsa magma.
- Prevents moss and lichen from damaging roof surfaces and causing leaks.
- Improves curb appeal and overall property value.
- Restores energy efficiency by keeping your roof reflective and clean.
- Uses eco-friendly cleaning products safe for plants, pets, and families.
- Backed by PPWPM’s $5,000 Satisfaction Guarantee and 500+ verified five-star reviews.
Frequently Asked Questions
- What causes black streaks on my roof? They are caused by Gloeocapsa magma, a type of roof algae that thrives in humid and shaded environments like San Leandro.
- Can moss or lichen damage my roof? Yes. Moss and lichen trap moisture that weakens shingles and can lead to rot or leaks.
- Is soft washing better than pressure washing? Yes. Soft washing uses low pressure and safe cleaners to remove algae and stains without damaging your roof.
- How long will my roof stay clean after treatment? Most roofs stay clean for two to three years depending on humidity, shade, and maintenance.
- Do you provide services for HOAs and commercial buildings? Yes. PPWPM provides professional roof cleaning for residential, HOA, and commercial properties throughout San Leandro and the East Bay.