Roof Cleaning in Jacksonville, FL

Our roof cleaning service in Jacksonville removes black streaks, moss and lichen with a low-pressure soft wash, never high-pressure blasting. Soft washing kills the algae at the root and protects shingle granules, so your roof looks clean and lasts longer.

We soft wash roofs throughout Jacksonville to remove the black algae streaking common on Florida shingles — using low-pressure application instead of high-pressure roof cleaning, which can strip granules and void your shingle manufacturer’s warranty. Roof cleaning is quoted per property based on square footage and roof pitch rather than a flat rate. If what you’re seeing is black streaking rather than green moss or heavy debris, soft washing is almost always the correct approach — and it’s usually far less expensive than premature roof replacement caused by algae damage left untreated.

Call: (904) 617-4480

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Roof soft washing — hero image placeholder

What’s Actually Causing Those Black Streaks

If your roof has dark streaking — usually running down from the ridge or concentrated on the north-facing slope — that’s not soot, dirt, or mold in the way most people assume. It’s most commonly caused by Gloeocapsa magma, an algae species that spreads by airborne spores and feeds specifically on the limestone filler used in most asphalt shingles. It thrives in humid climates with regular moisture, which describes Jacksonville’s weather almost year-round.

This matters for two reasons:

It’s not just cosmetic. Left untreated, this algae can degrade shingle granules over time, which shortens your roof’s effective lifespan and can affect its ability to reflect heat efficiently — a real cost consideration in Florida’s climate.
It explains why pressure washing your roof is a bad idea. Since the organism is feeding on the shingle material itself, blasting it with high pressure doesn’t address the underlying growth — it just knocks granules loose along with it, which is the opposite of what you want.

Why We Never Pressure Wash a Roof

This is worth being direct about, because it’s a genuine point of difference in how roofs should be cleaned versus how some companies actually clean them:

High pressure strips protective granules off asphalt shingles, which accelerates wear and can shorten the life of your roof.
Most shingle manufacturers explicitly warn against high-pressure cleaning in their warranty documentation, and improper cleaning can be used to deny warranty claims later.
High pressure can force water under shingles and flashing, creating leak risk that wasn’t there before the cleaning even started.
Soft washing addresses the actual cause — algae — using a low-pressure application of an appropriate cleaning solution that kills the organism at the surface and allows normal rainfall to rinse away the residue over the following days, rather than mechanically blasting the roof.

If a company is offering to “pressure wash” your roof at high PSI, that’s worth a second look before you agree to it.

How Roof Soft Washing Works

Assessment from the ground and, when needed, the roof itself. We check the type and extent of staining, roof material, pitch, and overall condition before quoting.
Protect landscaping and gutters. Plants near the drip line are pre-rinsed and protected, since roof cleaning solution runs off the edge of the roof during application.
Apply a low-pressure cleaning solution. Rather than scrubbing or blasting, the solution is applied at low pressure and allowed to work on the algae directly.
Light rinse where appropriate. Some jobs need a gentle low-pressure rinse; many are left to rinse naturally with the next rainfall, which is part of how soft washing is designed to work — it doesn’t require aggressively rinsing every trace of solution off immediately.
Results appear over the following days, not necessarily immediately. This is normal for soft washing and is a deliberate part of how the treatment works, not a sign it didn’t take effect.

What It Costs

Roof cleaning pricing depends on:

Roof square footage — larger roofs cost more, straightforwardly
Roof pitch — steeper roofs take more time and sometimes additional safety equipment
Severity of staining — heavier, longer-standing algae growth may need a stronger treatment or, occasionally, a second application
Roof material — asphalt shingle, tile, and metal roofs are all cleaned differently and priced accordingly

We quote roof cleaning per property after a look at your specific roof — reach out with your address and roof type for an accurate range.

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→ See our full pricing guide

Why Soft Washing Is the Right Roof Cleaning Method

Roof cleaning soft wash removing black algae streaks

Those dark streaks on so many local roofs are usually a type of algae that feeds on the limestone filler in asphalt shingles. The Asphalt Roofing Manufacturers Association provides guidance on caring for asphalt roofs, and high pressure is not part of it. That is why every roof cleaning homeowners book with us uses soft washing.

What to Expect on Cleaning Day

Algae buildup removed from a Jacksonville home exterior

We protect plants, cover sensitive fixtures and apply the cleaning solution from the ground or roof edge. The solution does the work, and a gentle rinse removes the residue. Gutters and fascia often get cleaner in the process, and you can add gutter cleaning to the same visit.

Soft washing a home exterior in Jacksonville

How Long Roof Cleaning Results Last

Most roofs stay clean for two to three years after a proper soft wash, depending on shade and nearby trees. Pairing roof cleaning with house washing keeps the whole exterior consistent, which matters if you are getting ready to sell.

Call (904) 617-4480 for a free estimate on roof cleaning homeowners trust.

Clean home exterior after pressure washing in Jacksonville

Frequently Asked Questions

Soft washing, done correctly, is a low-risk process specifically because it avoids the high pressure that actually causes leak risk by forcing water under shingles and flashing. The low-pressure application is designed to work with the roof’s existing water-shedding design, not against it.

Often a few days to a couple of weeks, since the treatment is designed to kill the algae at the surface and let normal weathering and rainfall carry away the residue, rather than mechanically scrubbing every trace off immediately.

Improper cleaning — specifically high-pressure washing — is what typically raises warranty concerns with shingle manufacturers. Low-pressure soft washing is the industry-standard, warranty-conscious approach for this reason.

This varies more by shade, roof pitch, and orientation than a fixed schedule, but many homeowners in humid, tree-covered areas have it done every 2–3 years to stay ahead of algae buildup before it becomes heavy staining.

Yes, though the approach and pricing differ by material — asphalt shingle is the most common roof type we treat for the algae staining described above, but tile and metal roofs can also accumulate algae, mold, or general grime and are cleaned with a method appropriate to that material.

Depends on the roof pitch and the equipment used — many soft wash applications can be done safely from a ladder or lift without walking the full roof surface, which also reduces the risk of shingle damage from foot traffic.

Protect Your Roof — the Right Way

Soft washing, done correctly, extends your roof’s life instead of shortening it.