Why algae and mildew show up so quickly in Florida
Jacksonville’s humidity, frequent rain, and tree cover create ideal conditions for organic growth. Surfaces that stay shaded through the afternoon, receive overspray from irrigation, or hold water after storms tend to green up first. That is why one side of a patio can look much worse than the other even when both were installed at the same time.
Start with a cleaner made for organic growth
For homeowner maintenance, use a product intended for algae, mildew, or exterior organic staining, and follow the label carefully. Let the cleaner dwell long enough to break down growth before rinsing. Scrubbing may still be needed in textured joints or low-traffic corners. Jumping straight to aggressive pressure is what often scars the surface or strips out sand without fully solving the root problem.
Use pressure carefully, not aggressively
Pressure washing can help rinse away loosened buildup, but more pressure is not better. Focus on fan tips, controlled distance, and even passes. The goal is surface cleaning, not etching the face of the paver or blasting out joints. If you are not sure whether pressure is helping or harming, read can pressure washing damage pavers? before you continue.
Fix the moisture source or the growth will return
Cleaning alone rarely solves the issue for long if the area still stays wet. Check downspouts, deck pitch, furniture mats, planter placement, and irrigation timing. Pool decks may also hold moisture around coping or in textured travertine. When homeowners reduce overspray and improve runoff, they usually see a major drop in repeat growth.
Know when it is time for professional cleaning and resealing
If algae keeps returning quickly, stains remain in the pores, or the surface has not been professionally cleaned in years, a deeper service may be the better answer. Cleaning and sealing work together. Once a surface is restored and protected properly, ongoing maintenance is simpler. For long-term planning, compare this with how often to clean pavers in Florida.
Frequently Asked Questions
Yes. On pool decks, shaded walks, and steps, algae can make the surface noticeably slick when wet.
It may lighten growth temporarily, but without correcting drainage or moisture issues, the growth often returns.
Sometimes. If the surface is porous and staying wet longer than it should, worn protection may be part of the problem.
Absolutely. Organic growth must be removed before sealing, or it can be trapped beneath the new finish.
