What Causes Tiger Stripes on Gutters & How to Remove Them in Mebane, NC

You finally cleaned out your gutters — but those ugly black vertical streaks on the front face are still there. Those are tiger stripes, and they're one of the most misunderstood problems homeowners in Mebane deal with.

What Are Tiger Stripes?

Tiger stripes are dark vertical streaks on the outside of aluminum gutters. They're a mix of:

• Electrostatically bonded dirt and grime from rainwater overflow
• Atmospheric pollutants (pollen, exhaust, organic debris)
• Oxidized aluminum that has chemically bonded with the contaminants

The reason they don't wash off with a hose or even a pressure washer is because the dirt is chemically bonded to the gutter surface — not just sitting on it.

Why Mebane Gutters Get Hit Hard

Mebane's combination of high pollen counts in spring, heavy summer thunderstorms, and tree-lined neighborhoods means your gutters take a beating. The wetter the climate, the worse tiger striping tends to be — which is why we see it constantly across the NC Piedmont.

How Tiger Stripes Are Actually Removed

Standard pressure washing won't touch them. Removing tiger stripes requires a gutter brightening treatment:

1. Apply a specialized acid-based gutter cleaner with a brush 2. Agitate by hand to loosen the bonded contaminants 3. Rinse thoroughly with low pressure 4. Repeat in stubborn areas

The result is gutters that look almost new — even on 20-year-old aluminum.

Can You DIY This?

Technically yes, but the cleaning chemicals are caustic, the work is on a ladder, and uneven application leaves visible streaks. Most homeowners we hear from after a DIY attempt either gave up or made the gutters look worse.

How Often Should You Brighten Gutters?

Once tiger stripes are removed, a gentle annual house wash usually keeps them at bay for 3–5 years before another full brightening is needed.

Get Your Mebane Gutters Looking New Again

If your gutters are clean inside but still look dirty outside, you don't need a replacement — you need a brightening. Steinbicker Pressure Washing offers gutter brightening across Mebane, Burlington, Graham, and Hillsborough. Call (907) 252-2285 for a free quote.