Exterior Mold & Mildew Removal in Pinellas County, FL
Exterior mold and mildew removal is a low-pressure detergent treatment for the organic growth that Florida humidity feeds on roofs, stucco, siding, concrete, and pool decks. The solution goes on at low pressure, stays on for the dwell time the product label gives, and is rinsed off. The method is matched to each surface and its condition. Cool Breeze has treated exterior growth across Tampa Bay since 1999, and the accepted written quote documents the surfaces, method, precautions, and exclusions. Call 727-584-6622 for a free written quote.
Where mold and mildew show up on Pinellas County homes
Heat, humidity, and summer rain make organic growth a year-round problem here. Green and gray mildew film takes hold on shaded north walls and under eaves. Black algae streaks spread down shingle and tile roofs. Dark mold patches build on concrete driveways, sidewalks, and pool decks, and screen enclosures, fences, and gutter faces collect their own film. We review each surface on site, because the growth, the material under it, and the right response differ from wall to roof to slab.
How a soft-wash treatment works
Cleaning solutions go on at low pressure and are left to work as the product label directs, then the surface is rinsed. Roofs get no surface blasting, painted walls get a gentler plan than concrete, and we use test areas where a coating or finish is in question.
The written quote states the products, dilution, dwell, rinsing, and precautions proposed for each surface.
Exterior cleaning is not mold remediation
This service treats visible organic growth on exterior surfaces. Indoor mold assessment and remediation are separately licensed trades in Florida, and no cleaning visit is a structural, roofing, environmental, or mold inspection. If mold shows up inside the home, or a wall shows signs of moisture getting in, call a licensed mold assessor before any exterior wash is scheduled.
What the written scope should address
Included surfaces: which walls, roof areas, slabs, or enclosures are treated, and what is excluded.
Method per material: the pressure, products, and dwell proposed for each surface and condition.
Precautions: product-label directions, landscape pre-wetting and rinsing, runoff controls, people and pets.
Known limitations: stains that are not organic growth, like rust or oxidation, behave differently and are identified ahead of time.
Schedule and price: one documented figure, controlled by the accepted written quote.
Which service treats which surface
Mildew on walls is handled by a house wash, roof streaks by a soft wash roof cleaning, mold on concrete by driveway and concrete cleaning, and film on enclosures by pool cage cleaning. One written quote can combine them, and gutter cleaning is included at no charge with any roof cleaning. City-specific house washing details are on the Clearwater, St. Petersburg, Largo, and Palm Harbor pages.
Where exterior growth is treated, and where the scope stops
| Where growth appears | Application usually proposed | Scope limit |
|---|---|---|
| Roof surfaces | Low pressure, under 100 PSI, with a dwelling solution | ARMA's algae-discoloration guidance and the roofing manufacturer's instructions |
| Siding and stucco walls | Low pressure with a diluted sodium hypochlorite and biodegradable surfactant blend | Coating condition and the state of sealant at openings |
| Concrete and pavers | Solution with a surface-cleaner pass where the material allows | Porosity and any existing sealer |
| Screen enclosures and lanais | Low pressure, solution and rinse | Mesh and spline condition |
| Anything indoors | Out of scope | Indoor mold assessment and remediation are separately licensed trades in Florida |
On where our work stops
Everything we treat is outside. If somebody is asking about growth indoors, that is a licensed remediation trade in Florida and it is not us, and I would rather say so on the phone than take the job.
Mold and mildew removal FAQs
Is the black staining on my roof mold?
The dark streaks on Pinellas County shingle and tile roofs are usually Gloeocapsa magma, an airborne algae, often growing alongside mildew and lichen.
It feeds on moisture and the limestone filler in shingles. A low-pressure soft wash treats the growth, and we check the cause and extent on site before proposing a method.
Can you remove mildew from painted stucco and siding?
Yes. A detergent wash at low pressure lifts the green and gray mildew film that builds on stucco, block, and vinyl walls, and a thorough rinse follows.
We document the paint condition first. Anything the wash cannot change, like oxidized chalky paint or stains that have etched the surface, is listed as a known limitation in the written scope.
Do you handle indoor mold?
No. Cool Breeze cleans exterior surfaces only. Indoor mold assessment and remediation are separately licensed trades in Florida, and exterior cleaning is not a structural, roofing, environmental, or mold inspection.
For interior mold or suspected moisture intrusion, contact a licensed mold assessor.
How long do surfaces stay clean after treatment?
There's no universal answer. Shade, tree cover, drainage, sprinkler overspray, and coastal humidity decide how fast organic growth returns to a given wall, roof, or slab. So base follow-up cleaning on how the surface looks.
Is the treatment safe for plants and pets?
The written scope lists the product-label directions, dilution, runoff controls, and landscape rinsing. A ground person pre-wets and rinses plantings during the treatment.
Tell us about ponds, gardens, or sensitive landscaping before you accept the quote; no cleaning process can promise zero exposure.
Mildew on vinyl, composite, or wood fencing is covered by fence cleaning, where the board material sets the method.
Want the deeper how-and-why on roof algae? Read why Florida roofs grow black streaks and the soft wash vs pressure wash comparison.
City-specific mold and mildew removal details are on the Clearwater, Dunedin, and Safety Harbor pages.
Ready to clear the mold and mildew?
Free estimates for exterior mold and mildew removal. Call 727-584-6622 today.
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