Exterior paint lasts 5–10 years on most surfaces. Wood siding needs repainting every 3–7 years; masonry and stucco can go 10–15 years between coats.
Exterior paint faces far more demanding conditions than interior paint — UV radiation, temperature cycling, moisture, and wind all degrade the paint film over time. NAHB and InterNACHI data indicate 5–10 years as the typical exterior paint lifespan, with wood surfaces on the lower end and masonry or stucco on the upper end. Climate plays a major role: direct sun, coastal salt air, and freeze-thaw cycles all accelerate paint degradation. The primary function of exterior paint is not aesthetic but protective — paint that is failing is allowing moisture intrusion into the underlying substrate.
Repaint when the paint is chalking (indicates the binder has broken down and the surface is no longer protected), when peeling is widespread, or when wood rot is found under failed paint areas. Don't wait until the paint is visually bad — by then, moisture damage to the underlying substrate has typically already occurred. A fresh exterior paint job every 7–10 years is far less expensive than siding or wood rot repair.
The chalking test is the most reliable indicator of when exterior paint truly needs replacement (not just a refresh). Rub your palm firmly across a painted surface — if significant white powder comes off, the paint binder has broken down and the surface is unprotected. Paint applied over a heavily chalked surface will not adhere properly and will fail early.
In Florida, exterior paint lasts 5–7 years rather than the national average. Intense UV exposure degrades paint binders faster, and high humidity promotes mold growth. 100% acrylic exterior paint with a high-quality primer is essential in Florida's climate. Consider paint with mildewcide additives.
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