What Is That Green Stuff Growing on My House in Mebane?

You've probably noticed it — that green, black, or gray buildup creeping across your siding, especially on the north side of your house. It seems like it showed up overnight, and no amount of garden hose spraying makes it go away. Here's what it actually is and what to do about it.

The Three Usual Suspects

1. Algae (Green) The most common culprit in Mebane. Green algae loves moisture and shade. You'll see it first on north-facing walls, under eaves, and near landscaping that traps moisture. It's slimy when wet and powdery when dry.

2. Mildew (Gray/White) Mildew appears as flat, gray or white patches. It thrives in humid conditions — which describes most of the year in the NC Piedmont. Mildew spreads fast in warm weather and can cover an entire wall in a single season.

3. Mold (Black/Dark) Black mold on exterior surfaces is usually a different species than the scary indoor mold you hear about. But it's still unsightly and can stain surfaces permanently if left untreated. You'll find it around windows, under gutters, and near the foundation.

Why Mebane Homes Are Especially Vulnerable

Our area has the perfect conditions for organic growth: - Average humidity above 70% for much of the year - Mature tree canopy in most neighborhoods — shade keeps surfaces damp - Warm temperatures from April through October — prime growing season - Clay soil that retains moisture near foundations

Does It Damage Your Home?

Yes, absolutely. Beyond looking terrible, organic growth: - Traps moisture against your siding, promoting rot - Deteriorates paint and stain finishes faster - Can work into seams and grow behind siding panels - Affects indoor air quality — exterior mold spores enter through windows and vents - Reduces home value — buyers see it as a maintenance red flag

How to Get Rid of It

What Doesn't Work - **Garden hose**: Removes surface dirt but doesn't kill the growth - **Bleach spray**: Kills surface growth but doesn't penetrate roots; also damages landscaping - **Scrubbing with a brush**: Exhausting, incomplete, and can scratch surfaces

What Works: Professional Soft Washing Our soft wash process uses low pressure with professional cleaning solutions that: 1. Kill algae, mold, and mildew down to the root system 2. Break the organisms' grip on the surface 3. Rinse everything away cleanly 4. Leave a residual treatment that slows regrowth

Results typically last 12–18 months depending on your home's exposure to shade and moisture.

Prevention Tips

After professional cleaning, you can slow regrowth by: - Trimming trees and bushes away from your home — sunlight is the best natural killer - Fixing drainage issues that keep foundation areas wet - Cleaning gutters regularly — overflow keeps walls wet - Scheduling annual soft washing before growth gets established

Ready for a Clean Home?

If the green stuff on your house is driving you crazy, call Steinbicker Pressure Washing at (907) 252-2285. We'll identify exactly what's growing, treat it properly, and restore your home's appearance. Free estimates for Mebane and all surrounding areas.