Tampa Bay Soft Washing
Low-pressure biocide cleaning that kills algae and mold at the root — safe for roofs, siding, and screens, and the only method roofing manufacturers approve. Results last 3–5x longer than pressure washing.
The Method
Soft washing cleans exterior surfaces with biodegradable biocide solutions applied at very low pressure — under 100 PSI on roofs, never more than 500 PSI on siding. That's roughly the force of a garden hose. Instead of blasting stains off with water, the solution kills the organisms causing them: Gloeocapsa magma (the black algae streaking Tampa Bay roofs), mold, mildew, lichen, and bacteria.
Pressure washing works the opposite way — 1,500–4,000 PSI of raw force. That's the right tool for concrete driveways and sidewalks, but on a roof or siding it strips shingle granules, cracks tile, tears screens, blows out stucco, and drives water behind siding seams. Worse, it only removes the growth you can see. The roots survive, and the stains return in months.
Because soft washing kills growth at the root, roofs stay clean 18–36 months and house exteriors 12–24 months — typically 3–5x longer than a pressure rinse. In Tampa Bay's year-round humidity, that difference is the whole ballgame.
Warranty-Safe
This isn't marketing — it's written into the warranty paperwork. High-pressure cleaning voids most shingle and tile warranties. Low-pressure soft washing preserves them.
The same logic applies beyond the roof: screen manufacturers void warranties over pressure-washed mesh, and stucco can't take PSI above 500 without water intrusion risk. Sandbar Soft Wash has spent 15+ years soft washing Tampa Bay roofs, siding, and pool cages the warranty-safe way.
Know The Difference
| Soft Washing | Pressure Washing | |
|---|---|---|
| Pressure | Under 100–500 PSI | 1,500–4,000 PSI |
| How it cleans | Biocide chemistry kills growth at the root | Force blasts growth off the surface |
| Best for | Roofs, siding, stucco, screens, gutters, painted wood | Concrete driveways, sidewalks, pool decks |
| Roof warranty | Preserved — ARMA/GAF/Owens Corning approved | Voided on most shingle & tile roofs |
| Results last | 18–36 months (roof) · 12–24 months (house) | Months — roots survive and regrow |
| Surface risk | None when done correctly | Stripped granules, cracked tile, torn screens |
We run both systems on every truck. Your roof gets soft wash chemistry; your driveway gets a high-PSI surface cleaner. Right method, right surface, every time.
Surfaces & Pricing
Asphalt shingle, tile, and metal. Removes black algae streaks at the root — stays clean 18–36 months.
$600–$1,800 House Soft WashingVinyl, stucco, Hardie, brick, painted wood. Soffit, fascia, and downspouts included — stays clean 12–24 months.
$400–$900 Pool Cage Soft WashingAluminum frames and screen mesh — soft wash is the only method that cleans without tearing panels.
$200–$600Coverage
Based in Holiday, FL and serving 12 cities across 3 counties — flat-rate pricing, $0 travel fees. Popular local pages: roof cleaning in Tarpon Springs, roof cleaning in Clearwater, and house washing in Palm Harbor.
Questions
Soft washing is a low-pressure cleaning method that uses biodegradable biocide solutions — applied at under 100–500 PSI, about the force of a garden hose — to kill algae, mold, mildew, and bacteria at the root. Pressure washing relies on 1,500–4,000 PSI of raw force; soft washing relies on chemistry. That is why results last 3–5x longer and why it is safe on roofs, siding, and screens.
Yes — it is the only method that is. Soft washing at under 100 PSI is the sole cleaning technique approved by ARMA (the Asphalt Roofing Manufacturers Association), GAF, and Owens Corning. Pressure washing a roof strips shingle granules, cracks tile, and voids most manufacturer warranties.
Roofs typically stay clean 18–36 months after a professional soft wash; house exteriors 12–24 months. Because the solution kills growth at the root instead of rinsing it off the surface, regrowth is far slower than after a pressure rinse. Shaded, north-facing, or waterfront surfaces regrow faster.
Roof soft washing runs $600–$1,800 for most Tampa Bay homes. House washing runs $400–$900, and pool cage cleaning runs $200–$600. Send your address for an exact quote within 24 hours — no on-site visit needed to get started.
Yes. We use professional-grade biodegradable solutions, rinse plants with fresh water before and after treatment, and follow strict containment around pools. Water your landscaping the morning of service for added protection.
Both, usually — on different surfaces. Roofs, siding, stucco, and screen enclosures need soft wash chemistry. Concrete driveways, sidewalks, and pool decks handle high-PSI surface cleaning well. We match the method to each surface on every job instead of blasting everything with one machine.
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