What Are Those Black Streaks?

If you have noticed dark streaks running down your roof, you are not imagining things — and it is not just dirt. Those streaks are caused by a type of algae called Gloeocapsa Magma. It feeds on the limestone filler in your asphalt shingles, breaking them down from the inside out.

Left untreated, this algae spreads across your entire roof, trapping moisture and accelerating shingle decay. What starts as a cosmetic issue quickly becomes a structural one.

Why Roof Cleaning Matters More Than You Think

Most homeowners do not think about their roof until there is a leak. But by then, the damage is already done. Here is what uncleaned algae and moss actually cost you:

Shingles lose granules faster, reducing their lifespan by 5–10 years
Trapped moisture leads to wood rot under the shingles
Moss and lichen physically lift shingles, allowing water to seep underneath
Insurance companies may deny claims or drop coverage for neglected roofs
Reduced curb appeal lowers your home's resale value

💡 A new roof in Greensboro costs $8,000–$15,000+. Professional roof cleaning costs a fraction of that — and can add years to your existing roof.

Soft Washing vs. Pressure Washing: What Is the Difference?

This is where most DIYers make a costly mistake. High-pressure washing a roof can blast off the granules that protect your shingles — the very granules that reflect UV rays and shed water. Once those are gone, your shingles are done.

Soft washing is the industry-recommended method. It uses low pressure combined with a professional-grade biodegradable cleaning solution to kill algae, moss, and lichen at the root — without touching the granules.

❌ High-Pressure Washing

• Blasts off protective granules
• Voids most shingle warranties
• Can crack or lift shingles
• Kills algae on surface only

✅ Soft Washing (Our Method)

• Safe for all shingle types
• Kills algae at the root
• Preserves shingle granules
• Longer-lasting results

How Often Should You Clean Your Roof?

In Greensboro, NC, the humid climate creates ideal conditions for algae and moss growth. Most roofs here benefit from cleaning every 2–3 years. If your home is shaded by trees or sits in a low-lying area, you may need cleaning more frequently.

The best time to schedule is spring or fall — before algae spreads during the humid summer months, or after leaves have fallen and you can clearly see the roof's condition.

Signs Your Roof Needs Cleaning Now

Black or dark brown streaks running down the shingles
Green or white patches of moss or lichen
Shingles look dull or discolored compared to when installed
You notice debris buildup in valleys or around vents
Neighbors have had their roofs cleaned recently (algae spreads by wind)

What to Expect From a Professional Roof Cleaning

When you book with Jump 2 It Pressure Washing, here is exactly what happens:

1
Free Inspection & Estimate
We assess your roof's condition and give you a transparent quote — no surprises.
2
Before Photos
We document the current state of your roof so you can see the full transformation.
3
Soft Wash Treatment
We apply our biodegradable, plant-safe cleaning solution at low pressure to kill algae, moss, and lichen.
4
Rinse & Inspect
We rinse the roof and do a final walkthrough to make sure every streak and patch is gone.
5
After Photos
We send you before and after photos so you can see the difference for yourself.

“Most homeowners are shocked when they see the before and after. The roof looks 10 years younger — and more importantly, it lasts 10 years longer.”

— Keith Jump, Owner · Jump 2 It Pressure Washing

Roof Cleaning Pricing in Greensboro, NC

At Jump 2 It, roof cleaning starts at $0.35 per square foot. For a typical 1,500–2,500 sq ft home, that means most roof cleanings fall in the $525–$875 range — a fraction of what a roof replacement costs.

Bundle your roof cleaning with a house wash or driveway cleaning and save 15% on your total.

Roof Cleaning 101: Why Your Shingles Need Professional Care