If you've noticed dark streaks, green patches, or black spots on your home's siding, you're not alone. Houston's warm, humid climate makes exterior walls a breeding ground for several organisms.
Common Causes of Dark Stains
- Algae (Gloeocapsa magma): The most common culprit. Creates dark green to black streaks, especially on north-facing walls.
- Mold & Mildew: Thrives in shaded, damp areas. Appears as black or gray fuzzy patches.
- Artillery Fungus: Tiny black dots that shoot from mulch beds onto light-colored siding.
- Oxidation: Chalky white residue on painted or vinyl surfaces from UV exposure.
The Right Removal Method
Soft washing is the only safe method to remove these organisms without damaging your siding. Our biodegradable solutions kill algae, mold, and mildew at the root, preventing rapid regrowth.
Prevention Tips
Keep mulch beds at least 6 inches from your foundation, trim vegetation away from walls, and schedule annual house washing to prevent buildup from returning.
Contact us for a free assessment of your home's exterior.
