The Surprising Truth About Those Black & Green Stains on Your Driveway.
The Surprising Truth About Those Black Stains on Your Driveway
They’re living organisms that create safety hazards and make your property look neglected. Here’s what they are and how to get rid of them for good.
The Key Facts:
- Black stains are bacteria (Gloeocapsa magma) that spread and worsen over time
- Green patches are algae that thrive in moist, shaded areas
- Both create slippery, dangerous surfaces when wet
- DIY cleaning provides temporary results (2-4 weeks)
- Professional treatment lasts 12-24 months
Bottom line: These organisms require professional-grade treatment to eliminate permanently
What You’re Really Dealing With
Those dark black streaks that look like oil stains are actually bacteria called Gloeocapsa magma. It feeds on the limestone in your concrete and develops a protective black coating, which is why it appears dark instead of its natural color. The slimy green patches are algae that thrive in moist areas.
Both organisms spread through airborne spores and can quickly take over your entire driveway, sidewalks, and patios.
Why This Matters to You
Safety Risk
Both create dangerously slippery surfaces when wet, leading to fall hazards for family and visitors.
Time & Hassle
Stop spending your weekends repeatedly cleaning the same stains. Professional treatment eliminates this recurring chore.
Property Value
Stained concrete makes your property look old and poorly maintained, impacting curb appeal.
Gets Worse Over Time
These organisms retain moisture and create conditions that can accelerate concrete deterioration.
Why DIY Methods Keep Failing (And It’s Not Your Fault)
If you’ve tried cleaning these stains yourself, you’ve probably experienced the frustrating cycle: spend a weekend scrubbing, see great initial results, then watch the stains return worse than before within a few weeks.
The Hidden Problem
These organisms form protective barriers and root systems that penetrate into your concrete. Surface cleaning only removes what you can see – the embedded portions remain alive and ready to regrow.
It’s not because you did anything wrong. You simply don’t have access to the professional-grade treatments needed to eliminate these organisms at their source.
How Professional Treatment Delivers Lasting Results
We use commercial-grade sodium hypochlorite solutions at proper concentrations with appropriate dwell times. This penetrates the protective barriers and eliminates the organisms completely – not just temporarily.
What Makes the Difference:
• Right chemicals: Professional-grade treatments that penetrate protective coatings
• Proper technique: Correct pressure and application methods for different concrete types
• Complete elimination: We target the source, not just surface appearance
• Landscape protection: Professional setup protects your plants and property
Results That Actually Last
Our professional treatment typically keeps concrete clean for 12-24 months instead of the 2-4 weeks you get from DIY methods. We eliminate recurring weekend cleaning sessions.
Licensed, Professional Service
As a licensed, bonded, and insured pressure washing company, we handle everything from setup to cleanup. You get superior results without the hassle, repeated attempts, or risk of damaging your concrete or landscaping.
Stop Fighting the Same Stains Every Few Weeks
Get professional results that last over a year, not just a few weeks.