If you've noticed dark black or gray streaks running down your roof in Flagler Beach, you're not alone. It's one of the most common calls we get from Flagler County homeowners — and one of the most misunderstood problems in home maintenance.

Those streaks aren't just dirt or weathering. They're a living organism, and if left untreated, they'll shorten the life of your roof by years.

What's Actually Causing Those Black Streaks?

The culprit is a cyanobacteria called Gloeocapsa magma. It thrives in warm, humid climates — exactly what Flagler Beach offers year-round. The bacteria feeds on the limestone filler in asphalt shingles, gradually breaking down the material that protects your roof from the elements.

The dark color you see is actually a UV-protective coating the bacteria produces to shield itself from sunlight. So the streaks get darker and more visible over time as the colony grows.

Left untreated, Gloeocapsa magma can:

• Reduce your roof's reflectivity, increasing cooling costs
• Accelerate shingle granule loss
• Void some manufacturer warranties
• Spread to neighboring homes (it's airborne)
• Attract moss and lichen, which cause even more structural damage

Why Pressure Washing Alone Won't Fix It

A lot of homeowners assume a standard pressure wash will take care of roof stains. It won't — and it can actually make things worse.

High-pressure water blasts shingle granules off the surface, accelerating wear and potentially voiding your warranty. It also doesn't kill the bacteria — it just moves it around. Within a few months, the streaks come right back.

The Right Solution: Soft Washing

Soft washing uses low-pressure water combined with a professional-grade cleaning solution — typically a sodium hypochlorite blend with a surfactant — to kill the bacteria at the source. The solution is applied gently, allowed to dwell, and then rinsed at low pressure.

The results are dramatic. Black streaks disappear completely, and because the bacteria is dead rather than just displaced, the results last 2–4 years rather than a few months.

Soft washing is the method recommended by the Asphalt Roofing Manufacturers Association (ARMA) and is required by most shingle warranty programs. If your warranty requires "low-pressure cleaning," soft washing is what they mean.

What to Expect From a Flagler Beach Roof Cleaning

Here's how our roof soft wash process works:

1. Pre-rinse — We wet down surrounding plants and landscaping to protect them from cleaning solution runoff.
2. Application — Our biodegradable cleaning solution is applied to the entire roof surface at low pressure.
3. Dwell time — We allow the solution to work for 15–20 minutes, killing bacteria, algae, and any moss or lichen present.
4. Rinse — A gentle low-pressure rinse removes the dead growth and cleaning solution.
5. Inspection — We walk the perimeter to confirm complete coverage and rinse any overspray from gutters and landscaping.

The entire process typically takes 1–3 hours depending on roof size and pitch.

How Often Does a Flagler Beach Roof Need Soft Washing?

Given the coastal humidity and salt air in Flagler Beach, most roofs benefit from soft washing every 2–3 years. If your home is heavily shaded by trees, you may need it more frequently since shaded areas stay moist longer and promote faster algae growth.

Signs it's time to schedule:

• Visible black or dark gray streaks on any roof surface
• Green patches (moss or lichen) near the ridge or in valleys
• Roof appears darker than it did when new
• Neighbors' roofs have visible streaking

Flagler Beach and the Surrounding Area

We serve all of Flagler Beach and the surrounding Flagler County communities, including Beverly Beach, Marineland, and the neighborhoods along A1A. Our team is familiar with the specific challenges that coastal salt air and ocean humidity create for roofs in this area.

Protect Your Investment

Your roof is one of the most expensive components of your home. A soft wash cleaning every few years costs a fraction of what early shingle replacement would run — and it keeps your home looking sharp from the street.

Call us at (386) 564-6700 or request a free quote online. We'll assess your roof, give you an honest estimate, and get the job done right.