If you’ve noticed dark streaks or green patches spreading across your roof in Alamo, you’re likely dealing with algae, lichen, or moss growth. These organisms thrive in the area’s shaded, moisture-rich environment, especially under trees in neighborhoods like Stonegate and Round Hill. Left untreated, they can damage shingles, trap moisture, and shorten your roof’s lifespan. PPWPM (Professional Power Washing & Property Maintenance) provides expert algae and lichen treatment in Alamo using safe, eco-friendly soft wash roof cleaning methods that restore your roof’s original appearance without damage.
What Causes Roof Algae and Lichen in Alamo?
The black streaks you see on many Alamo roofs are caused by a type of cyanobacteria known as Gloeocapsa magma. This airborne organism feeds on the limestone filler in asphalt shingles, leaving behind dark stains. Add in humid mornings, tree shade, and pollen from local oaks and pines, and you’ve got the perfect breeding ground for algae, moss, and lichen. Over time, these organisms can:- Eat away at shingle materials and roof granules.
- Trap moisture that accelerates roof decay.
- Cause discoloration and reduce energy efficiency.
- Spread to neighboring properties if not treated properly.
Why You Should Avoid Pressure Washing Your Roof?
Many homeowners think pressure washing can remove roof algae, but it does more harm than good. High-pressure jets strip away shingle granules and can cause permanent damage. It’s especially risky for older roofs or delicate materials like tile and wood shake. Instead, PPWPM uses a specialized soft wash roof cleaning system, recommended by roofing manufacturers that gently removes algae, moss, and lichen while protecting your roof structure.Our Eco-Friendly Algae & Lichen Removal Process
- Inspection & Identification – We assess your roof to identify algae, lichen, moss, or mold.
- Low-pressure soft wash – A controlled, low-PSI rinse combined with eco-friendly cleaning agents safely eliminates growth.
- Root-level treatment – Our biodegradable formula kills spores and prevents regrowth for up to 2–3 years.
- Rinse & restore – We remove residue and restore your roof’s natural color without damaging shingles.
- Final protection – Gutters, siding, and landscaping are fully shielded during cleaning.
Benefits of Professional Algae & Lichen Treatment
- Eliminates black streaks and roof stains caused by Gloeocapsa magma.
- Prevents costly roof replacements by extending roof life.
- Improves curb appeal and property value.
- Eco-friendly cleaning: safe for pets, plants, and the environment.
- Backed by PPWPM’s $5,000 Satisfaction Guarantee and 500+ five-star reviews.
Common Questions About Roof Algae and Lichen
- What are the black streaks on my roof? They’re caused by Gloeocapsa magma, a type of algae common in humid climates like Alamo’s.
- Can lichen damage my shingles? Yes. Lichen roots attach to shingle granules, leading to premature deterioration if not treated.
- How long does the soft wash treatment last? Typically 2–3 years, depending on roof material and shade conditions.
- Is your cleaning solution safe? Absolutely. We use biodegradable, eco-friendly roof cleaners that are safe for vegetation, pets, and families.
- Do you service HOAs and commercial roofs? Yes, we work with HOAs, schools, and facilities throughout Alamo and nearby cities for ongoing roof maintenance programs.