Roof Cleaning & Moss, Algae & Lichen Removal
Black streaks on asphalt shingles are caused by Gloeocapsa Magma algae feeding on shingle limestone granules. Moss and lichen colonies hold moisture against shingle surfaces, accelerating granule loss and shortening roof lifespan. High-pressure washing destroys granule protection — RoofingFixed uses EPA-safe soft wash chemistry that kills organisms at the root level without damaging your shingles, and applies preventative treatments to inhibit regrowth.
Our Standardized Execution Process
Pre-treatment plant protection
We wet down all landscaping and cover sensitive plants before applying roof treatment chemistry.
Soft wash biological kill application
Our biodegradable cleaning solution is applied at low pressure to kill all biological growth at the root level.
Rinse, prevention & documentation
We rinse the roof surface, flush gutters, install zinc prevention strips at the ridge, and photograph the finished result.
Estimated Cost Breakdown Tiers
Every roof exhibits unique pitch and accessibility parameters. Typical project ranges are categorized below:
Warning Signs To Watch For:
- Dark black or gray streaks running vertically down shingles
- Green or yellow-green moss mounds concentrated on north-facing slopes
- Gray-white crusty lichen patches bonded directly to shingle granules
- Neighbors' homes having the same issue (algae spreads via wind)
Common Root Causes:
- Limestone filler in shingles feeding Gloeocapsa Magma algae colonies
- Shaded north-facing slopes retaining moisture that accelerates moss growth
- Humid climates or tree canopy creating ideal biological growth conditions
Industry Best Practices & Code Compliance
Proper execution of roof cleaning & moss, algae & lichen removal demands strict compliance with International Residential Code (IRC) Section R905 and local municipal building codes. Key requirements include:
Frequently Asked Questions
Will pressure washing remove the black streaks?
It will temporarily, but high-pressure washing strips granules from shingles, voiding manufacturer warranties. Soft wash is the correct method.
How long will it stay clean after treatment?
With zinc strip installation, most roofs stay clean for 3–5 years. We recommend re-treatment every 3 years in high-humidity climates.
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Roof Cleaning Available In All 50 States
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