Serving the Greater Austin Metro Since 2015
Roof Washing in Austin, TX
Those black streaks are algae growing on your shingles. Our soft wash removes them without a pressure washer ever touching your roof — avoiding the pressure washing that can void your warranty.
Pricing: Roof washing starts at $600 for single-story homes. Most two-story and larger roofs range higher depending on pitch, square footage, and algae coverage. Final price confirmed during your free assessment, before any work begins.
The dark streaks running down Austin roofs are Gloeocapsa magma — an airborne algae that feeds on the limestone filler inside asphalt shingles. Left alone, it spreads across the roof and holds moisture against the surface. It also makes even a newer home look neglected from the street.
Pressure washing a roof strips the protective granules off shingles and voids most manufacturer warranties — which is why our technicians never do it. Instead, we soft wash: a low-pressure application of professional cleaning solutions that kills the algae completely, followed by nature's rinse. Streaks fade immediately and continue disappearing over the following weeks as the dead growth releases.
Every roof wash starts with a free in-person assessment, because pitch, square footage, and algae coverage vary too much for honest sight-unseen pricing. Your exact price is confirmed before any work begins, and your landscaping is protected throughout the job.
Why Austin Homeowners Choose Monarch
Soft wash only — never pressure washed
No spinning nozzles, no stripped granules — avoiding the pressure washing that can void your shingle warranty. Low pressure and professional chemistry do the work.
Kills algae at the root
Treatment eliminates the organism, not just the stain — keeping roofs cleaner for years, not months.
Landscaping protection standard
Plants pre-wet and covered, runoff controlled, everything rinsed after. It's part of the process, not an add-on.
Free on-site assessment
A technician evaluates pitch, footage, and coverage, then confirms your exact price before work is scheduled.
Recent Results
Tile roof — algae streaks removed
Shingle roof — soft wash restoration
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What Austin Homeowners Say
Frequently Asked Questions
Will soft washing damage my roof?
No — soft washing exists precisely because pressure washing damages roofs. The application pressure is comparable to a garden hose, and the cleaning solutions are the method shingle manufacturers themselves recommend for algae removal. Your shingles' protective granules stay where they belong.
How long does roof washing take?
Most single-family roofs take a few hours, including landscaping protection and rinse-down. Larger or steeper roofs can take longer — your technician will give you a time estimate during the free assessment.
What causes black streaks on a roof?
A hardy airborne algae called Gloeocapsa magma. It lands on your roof, feeds on the crushed limestone inside asphalt shingles, and spreads downhill in dark streaks — most visibly on north-facing slopes that stay damp. It's extremely common across Austin and Central Texas.
What do you do to protect my landscaping?
Before treatment, our technicians pre-wet all plants and grass around your home and cover sensitive beds. During the wash, runoff is controlled and diluted, and afterward everything is rinsed again. Protecting your property is built into every step of the process.