How much does it cost to clean a roof?

Most Ohio Valley homes run $350–$700, or about $0.20–$0.55 per square foot. Steep, tall, or heavily-stained roofs cost more. Rally gives a free quote after a quick assessment.

Will roof cleaning damage my shingles?

Not the way we do it. Rally uses a no-pressure soft wash that's manufacturer-approved — it removes algae and moss safely without stripping granules or voiding warranties.

How long do the results last?

Because soft washing kills algae at the root (not just rinses it), results typically last years longer than pressure washing — often 3–5+ years depending on shade and exposure.

Roof Cleaning Cost | Black Streak Removal — Wheeling WV & Ohio Valley

How Much Does Roof Cleaning Cost? (2026 Guide)

Roof cleaning (soft washing) in the Ohio Valley typically costs $0.20–$0.55 per square foot, which puts most homes between about $350 and $700, with larger or steep roofs running $800–$1,200+. The price depends on roof size, pitch, height, and how heavy the black streaks and moss are. Here's how it works — and why it's far cheaper than a new roof.

Updated June 18, 20264 min read

Typical roof cleaning prices (soft wash)

Per square footof roof area	$0.20 – $0.55
Average single-story homemoderate streaking	$350 – $600
Two-story / steep roofmore access + safety	$600 – $900
Large or heavy moss/lichenextra treatment	$900 – $1,200+

Ranges are typical Ohio Valley estimates for illustration only — not a quote. Every Rally roof estimate is free and quoted after a quick assessment.

What drives the price

Roof size (square footage) — the main factor
Pitch & height — steep, tall, two-story roofs need more access and safety gear
Severity — heavy black algae, moss, and lichen take more product and dwell time
Roof type — asphalt, metal, or flat each get the right approach

Soft wash only — never pressure-washed

Roofs should never be pressure-washed — high pressure strips shingle granules and can void your warranty. Rally uses a manufacturer-approved soft wash that kills the algae (Gloeocapsa magma) at the root with no pressure, so the streaks don't just disappear — they stay gone longer.

Why it's worth it

Those black streaks are living algae feeding on your shingles. Left alone, they shorten your roof's life. A $350–$700 cleaning can add years to a roof that costs $10,000+ to replace — one of the best-value things you can do for your home.

Want your exact price?

Skip the guesswork — get a free, no-pressure quote in writing, usually the same day.

Get My Free Estimate Call (740) 208-8632

Learn more about Roof Washing.