If you live east of I-95 in St. Johns, Duval, or Flagler County, your home's exterior paint is fighting a three-front war: ultraviolet radiation, airborne salt, and persistent humidity. Each one attacks paint differently, and ignoring any of them shortens the life of your repaint by years.
The three culprits
UV radiation breaks down the resin binders in paint. South- and west-facing walls get the worst of it. Cheap paint loses its sheen, then chalks, then fails outright in as little as four years. Premium 100% acrylic resists UV degradation far better — but only if you put two full coats on a properly prepped surface.
Salt deposition is a coastal killer. Salt crystals form in micro-cracks in the paint film, then expand and contract with humidity changes. Over time, this micro-cracking compromises the entire envelope.
Humidity drives mold and mildew growth on the paint surface and behind it. Without a mildewcide-treated wash before painting, the spores stay alive on the substrate and bloom right through the new finish.
What proper prep looks like
Before we lay a single drop of paint on a Florida exterior, we do the following — every time:
- Soft wash with mildewcide and let dry fully (24–48 hours)
- Hand-scrape any failing paint to a sound edge
- Re-caulk every joint where wood meets wood, wood meets stucco, or trim meets siding
- Spot-prime bare wood, stucco patches, and any stain or watermark
- Apply two finish coats of premium acrylic paint, with proper recoat times between
Skipping any one of these steps is the difference between a 10-year repaint and a 4-year repaint.
Product matters too
We use Sherwin-Williams Emerald and Benjamin Moore Aura on most coastal exterior projects. These are not the cheapest paints on the shelf, but they're formulated for UV stability, mildew resistance, and flexibility — exactly the three things a Florida exterior demands. Builder-grade paint costs less per gallon and twice as much per decade.
When to repaint
Most Florida coastal exteriors need a full repaint every 7–10 years. Inland homes can sometimes stretch to 12. The signs you've waited too long: chalking that comes off on your hand, fading that's visible side-by-side with shaded areas, hairline cracks in the paint film, or peeling at the trim joints.
If you're seeing those signs, get a quote before the next storm season.
Have a project to discuss?
Free, no-pressure estimates from Andy Feldman himself.