Most home maintenance advice is written for four-season climates. It talks about winterizing, spring thaw, and fall prep. None of that applies in Sarasota. Florida has two seasons that govern exterior maintenance: wet season and dry season. Everything else follows from those two.
The Two Seasons That Control Your Home's Exterior
Wet Season — The Damage Season
Wet season is when the work happens — not for you, but for mold, algae, and mildew. Daily afternoon thunderstorms keep every exterior surface constantly wet. Temperatures stay in the 90s. Humidity rarely drops below 70%. This combination creates ideal growing conditions for biological growth on every exterior surface.
- Average rainfall: 25–30 inches over four months
- Average humidity: 75–85%
- Algae growth rate on untreated roofs: 3–4x faster than dry season
- Hurricane season overlaps entirely with wet season
Cleaning during peak wet season has limited effectiveness. Surfaces re-wet within hours of cleaning. The strategic move is to prepare surfaces before wet season begins and recover them after it ends.
Dry Season — The Maintenance Window
Dry season is when professional cleaning delivers its best results. Surfaces dry completely between treatments. Chemical applications have full dwell time before the next rain. Temperatures are comfortable and humidity drops enough for surfaces to stay clean significantly longer.
- Average rainfall: 12–15 inches over eight months
- Average humidity: 55–65%
- Surface drying time: hours instead of days
- Cleaning results last 2–3x longer than wet season cleaning
Within dry season, two windows are especially valuable: April (the last chance to prepare before wet season) and October (the first opportunity to recover from it).
What Happens to Each Surface by Season
🏠 Roof
Wet season: Algae (Gloeocapsa magma) spreads rapidly. Black and dark green streaks appear. Algae feeds on limestone filler in asphalt shingles — this is structural damage, not just cosmetic.
Dry season: Growth slows dramatically. Best time for soft washing treatment.
🛣️ Driveway & Walkways
Wet season: Green algae covers concrete within weeks of cleaning. Algae creates slip hazard. Oil stains penetrate more deeply in warm temperatures.
Dry season: Algae recedes. Best time for deep cleaning and sealing.
🏊 Pool Cage
Wet season: Screens accumulate mold on the mesh. Frame corners develop black algae deposits. Salt spray from storms deposits on all metal components.
Pollen season (Feb–Apr): Screens clog with pollen, restricting airflow.
🧱 Siding & Soffits
Wet season: Mildew grows on north-facing and shaded surfaces. Stucco especially vulnerable near ground level where splash-back occurs.
Pollen season: Yellow-green coating on all horizontal surfaces. Acidic pollen can etch paint on prolonged contact.
🪨 Pavers
Wet season: Unsealed pavers develop moss and algae in joints. Joint sand washes out in heavy rain. Wet pavers become slippery.
Dry season: Best time to clean and reseal. Sealant cures completely before wet season if applied in April.
🪟 Windows & Screens
Wet season: Hard water deposits from rain and sprinklers. Screen mesh accumulates algae.
Dry season: Window cleaning results last significantly longer. Lower humidity prevents rapid re-streaking.
The Seasonal Cleaning Calendar in Brief
February — March: Pollen Season
Oak and pine pollen coats every horizontal surface. House washing and pool cage cleaning before pollen peaks is easier and cheaper than cleaning after accumulation bonds to surfaces. Peak pollen: March.
April: Pre-Wet Season Preparation
The most important cleaning window of the year. Roof soft washing, paver sealing, and surface cleaning done now provides protection through six months of wet season. Algae treated before wet season grows back far more slowly than untreated algae.
June — September: Monitor and Protect
Limited cleaning value during peak wet season. Focus on storm prep in June, damage monitoring after storms in August/September. Document what accumulates for fall cleaning.
October: Post-Wet Season Reset
The second most important cleaning window. Remove everything wet season deposited. Surfaces cleaned in October stay clean through the entire dry season. This is when the work shows most dramatically.
November — January: Dry Season Maintenance
Lowest-maintenance period of the year. Light maintenance as needed. Plan and book spring cleaning early — April availability books out fast.
Frequently Asked Questions
When is the best time to pressure wash in Sarasota?
The two best times are April and October. April cleaning prepares surfaces for wet season — algae treated before the rainy season grows back far more slowly. October cleaning removes everything summer deposited and leaves your home looking good through the entire dry season. Most Sarasota homeowners who maintain professionally do two cycles: one in each window.
How does Florida's wet season affect my home's exterior?
Florida's wet season creates conditions where mold, mildew, and algae grow 3–4 times faster than in dry months. Daily rain keeps surfaces constantly wet. High humidity prevents surfaces from fully drying between rain events. Combined with heat and UV exposure, this creates near-ideal conditions for biological growth on roofs, driveways, siding, and pool cages. A home with a clean roof in May will often show visible algae streaks by September without treatment.
How often should I clean my roof in Sarasota?
Most Sarasota homes benefit from roof soft washing once per year, ideally in April or October. Homes in heavily wooded areas, near salt water, or with significant roof shade may need treatment twice yearly. The dark streaks you see on Florida roofs are caused by Gloeocapsa magma — an algae organism that feeds on the limestone filler in asphalt shingles. This is structural damage, not cosmetic staining. Left untreated, it shortens roof lifespan measurably.
Does pollen damage my home's exterior?
Pollen itself doesn't damage surfaces structurally, but it creates several problems. On pool cage screens, pollen accumulation restricts airflow and traps humidity against the mesh, accelerating corrosion. On driveways and walkways, pollen becomes slippery when wet. On painted surfaces, pollen is mildly acidic — prolonged accumulation on improperly sealed paint can cause surface etching. The bigger issue is that pollen provides nutrients for mold and algae growth that follows.
When does pollen season peak in Sarasota?
Pollen season typically peaks in March, with buildup beginning in late February. Oak, pine, and Brazilian pepper trees are the primary contributors. The yellow-green coating on horizontal surfaces — driveways, pool decks, rooftops, vehicles — is most visible from late February through mid-April. Scheduling house washing in late February or early March keeps the accumulation from bonding to surfaces during its peak period.
Should I clean before or after hurricane season?
Both, ideally. Clean before hurricane season (April) to protect surfaces from wet season growth. Clean after hurricane season (October) to remove everything summer deposited, including salt spray from Gulf storms that reaches properties miles inland. If you can only do one cleaning per year, October gives you the longest-lasting results — your home stays clean through the entire dry season that follows.
Why does my pool cage get so dirty so fast?
Pool cages in Sarasota face a combination of factors that accelerate biological growth: they're constantly wet from pool splash and rain, they're shaded which prevents UV from slowing algae growth, and they're constructed with aluminum and fiberglass components that hold moisture in the joints and corners. The mesh itself provides significant surface area for algae to colonize. Regular cleaning — at least annually — is the only effective maintenance strategy.
Ready to Schedule Based on the Seasons?
Mold Munchers has been cleaning Sarasota County homes and businesses since 2015. We know the seasonal patterns and schedule accordingly.
Get Free Estimate (941) 504-4476