Why Tiger Striping Happens on Florida Gutters (And How to Fix It)

What's Actually Causing It

Tiger striping is oxidation. Most aluminum gutters have a baked-on enamel finish, but over years of UV exposure, heat, and rain, that finish breaks down at a microscopic level. As it oxidizes, it forms a chalky residue that washes down the face of the gutter every time it rains, leaving streaks in the path the water travels. Florida's intense sun and frequent rain make this happen faster here than almost anywhere else in the country.

Why Regular Gutter Cleaning Doesn't Remove It

This is a common point of confusion: gutter cleaning clears leaves, debris, and buildup from inside the gutter channel so water flows properly. Tiger striping is an exterior surface issue on the gutter face itself — a completely separate problem that regular cleaning doesn't address, which is why it's its own dedicated service.

"Removing oxidation requires a specialized treatment, not a standard wash. Gutters that looked permanently stained come back to a like-new, uniform finish."

How Gutter Brightening Actually Works

Removing oxidation requires a specialized treatment, not a standard wash. We apply a gutter-specific brightening solution formulated to dissolve the oxidized layer and the embedded staining without damaging the underlying enamel finish, then rinse it clean. The difference is dramatic — gutters that looked permanently stained come back to a like-new, uniform finish.

Will It Come Back?

Oxidation is an ongoing process driven by sun and weather exposure, so yes, it will gradually return over time — but typically not for a year or more after a proper brightening treatment, and the buildup is far slower to redevelop once the old oxidized layer has been fully removed rather than just masked.

Tiger Striping vs. Normal Dirt

Quick way to tell the difference: regular dirt usually wipes off easily and isn't confined to vertical streak lines. If it's streaky, rust-toned, and concentrated below the gutter seams and corners, that's oxidation, not dirt — and pressure alone won't lift it.