Black streaks, green patches, and stained shingles are everywhere in South Florida. They are not just ugly — they are living organisms eating away at your roof. This guide breaks down roof cleaning costs, explains the safest cleaning method (soft washing), and compares it to pressure washing so you can protect your home and your wallet.
How much does roof cleaning cost in South Florida?
Roof cleaning prices in South Florida typically fall between $300 and $800 for an average residential shingle roof. Larger homes, tile roofs, or roofs with severe algae and mildew can cost $900 to $1,500+. Most companies price by square footage, roof pitch, and material type.
What affects roof cleaning prices?
- Roof size and total square footage
- Roof material (shingle, tile, metal, flat)
- Pitch and how easy it is to access safely
- Amount of algae, mildew, and lichen buildup
- Number of stories and surrounding landscaping
- Whether gutters need cleaning or protection
What is soft wash roof cleaning?
Soft wash roof cleaning is a low-pressure cleaning method that uses a specialized blend of biodegradable detergents, surfactants, and mildewcides. The solution is applied to the roof, left to dwell, and then rinsed away with water pressure similar to a garden hose.
Unlike high-pressure washing, soft washing kills the algae and mildew at the root instead of just blasting off the top layer. That is why the results last longer and why shingle manufacturers recommend it.
Key benefits of soft washing your roof
Pressure washing vs. soft washing for roofs
High-pressure washing may look satisfying in a video, but on a roof it is risky. The forceful stream can strip the protective granules from asphalt shingles, crack clay or concrete tiles, and push water underneath the roofing material. It also often voids roofing warranties.
| Factor | Pressure Washing | Soft Washing |
|---|---|---|
| Water pressure | 1,500–4,000+ PSI | Under 500 PSI |
| Shingle safety | Can strip granules | Gentle, no damage |
| Tile roof safety | Can crack tiles | Safe for tile and metal |
| Kills algae roots | Usually no | Yes — detergents treat roots |
| Result longevity | Months | 2–3 years |
| Warranty risk | May void warranties | Manufacturer-recommended |
For roof cleaning in South Florida, soft washing is the industry standard and the method All-Done Exterior Cleaning uses on every residential roof we touch.
Why roof cleaning matters in South Florida
South Florida's heat, humidity, and year-round rainfall create the perfect environment for Gloeocapsa magma — the blue-green algae that causes those black streaks on roofs. Algae feeds on the limestone filler in asphalt shingles and spreads across the roof, holding moisture against the surface.
A dirty roof does more than hurt curb appeal. It can:
- Shorten the life of your shingles or tiles
- Increase cooling costs by absorbing more heat
- Allow moss and lichen to lift roofing materials
- Create conditions for leaks and wood rot
- Lower your home's resale value and first impression
How often should you clean your roof?
Most South Florida homes should have the roof professionally cleaned every 2 to 3 years. If your home is heavily shaded by trees, sits near water, or has a history of algae, an annual soft wash may be the better schedule. Regular cleaning is far cheaper than a premature roof replacement.
How to choose a roof cleaning company
Not every exterior cleaning company is trained to clean roofs safely. Before you hire, confirm the company:
- Is licensed and insured in Florida
- Uses soft wash methods, not high-pressure spray
- Protects landscaping, gutters, and outdoor fixtures
- Offers a free, no-pressure written estimate
- Has documented reviews and before/after photos
- Stands behind the work with a satisfaction guarantee
Frequently asked questions
How much does roof cleaning cost?
Most South Florida homeowners pay $300–$800 for an average shingle roof. Larger, steeper, or tile roofs can range from $900–$1,500+. Exact cost depends on roof size, condition, and material.
What is soft wash roof cleaning?
Soft washing uses low-pressure water and biodegradable cleaning solutions to kill algae, mildew, and lichen on the roof without damaging shingles or tiles.
Is pressure washing safe for roofs?
High-pressure washing is generally not safe for roofs. It can strip granules, crack tiles, and force water under shingles. Soft washing is the recommended method.
How long does roof cleaning take?
An average residential roof cleaning takes 2–4 hours. Larger homes or heavily soiled roofs may take longer. The cleaning solution continues working for days after application.
How often should I clean my roof in South Florida?
Every 2–3 years is typical. Homes with heavy tree cover or recurring algae may benefit from annual cleaning.