Clean Freaks Co. Exterior whole-home soft-wash in Jupiter Island.

An oceanfront elevation on a narrow barrier island lives in conditions most inland exteriors never see. Onshore wind carries a fine salt aerosol that settles into stucco pores, chalks paint, and etches the calcium-rich surface of coquina and shell-stone. Add near-constant humidity and the result is a surface that is biologically active nearly year round — Gloeocapsa algae streaking north-facing walls, mildew colonizing shaded eaves, and lichen taking hold on porous masonry. High pressure would strip the very finishes that protect the house, which is why this is soft-wash work, not power washing.

The material mix on these estates is unusually delicate. Coquina and tabby are soft, permeable limestones that dissolve under acid and pit under a concentrated stream. Cedar shake furs and splinters when driven hard. Painted clapboard and marine spar finishes are engineered to flex and shed salt, and a careless wand tears through them. Each of these needs a chemistry and dwell time matched to the substrate, then a low-volume rinse that clears both the killed organic layer and the residual salt without forcing water behind the cladding.

There is also the debris factor. Cabbage palms, coconut palms, and sea grape shed constantly, and every storm season loads gutters, screen enclosures, and horizontal ledges with wet organic matter that stains and re-seeds growth. Cleaning here is not a one-pass cosmetic wash — it is managing a living surface in a marine environment.

1. The partner first identifies every substrate on the elevation — stucco, cedar shake, painted wood, coquina, tabby, aluminum screen frame — and pre-wets adjacent landscaping and salt-tolerant plantings, since the same salt-hardy species that survive the dune line are sensitive to soft-wash runoff.
2. Organic growth is treated with a surfactant-carried sodium hypochlorite solution diluted to the substrate, applied at garden-hose pressure and given time to kill algae, mildew, and lichen at the root rather than smearing them across the wall.
3. Porous shell-stone and coquina are handled with neutral or low-alkaline chemistry only — never acid — to lift biological staining and salt haze without dissolving the calcium matrix or opening the pores further.
4. The elevation is finished with a thorough low-pressure fresh-water rinse that clears the killed growth and flushes chloride salt from stucco pores, screen channels, and mortar joints, so the surface is left clean and de-salted rather than merely brightened.

• Late October into November, after hurricane season closes — clearing storm-driven salt spray, wind-blown debris, and the growth surge that the wet, warm season leaves on shaded elevations.
• Before the winter occupancy season — owners returning for the dry months want the exterior, screen enclosures, and entry elevations reset ahead of the household’s return.
• After any named storm or prolonged onshore blow — heavy salt loading and palm-frond debris should be flushed within days before they etch paint and re-seed algae.
• At the start of the summer wet season — a spring treatment slows the algae and mildew bloom that humidity and afternoon storms drive across north- and east-facing walls.
• When black streaking or lichen first appears on masonry — early intervention on coquina and tabby avoids the deeper staining that becomes far harder to lift once it sets into porous stone.