Roof Cleaning: Soft on Shingles, Tough on Grime

5.0★ from 224 neighbors • Licensed & Insured • Fast Quotes

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✓ 12-Month Guarantee ✓ 224 Five-Star Reviews ✓ Starts at $499, gutter cleaning included

Before & After Results

Before and after: moss in every shingle seam removed and treated on a Seattle-area asphalt roof

Trusted by Seattle Homeowners Since 2022

5.0-Star Rated

224 Google Reviews

Trusted by Businesses

Commercial & Residential

Family-Owned & Operated

Based in Kenmore, WA

Fully Protected

Licensed, Bonded & Insured

Frequently Asked Questions

Will you damage my shingles with high pressure?

How long does the moss treatment last?

Do I need to be home during the roof cleaning?

Do you clean metal roofs?

Can moss on my roof affect my homeowners insurance?

5.0★

Star Rating

224 Reviews

12mo

Month Guarantee

Moss-Free

100%

Satisfaction

Money-Back Guarantee

500+

Roofs Cleaned

$1M Liability Insured

Eco-friendly, non-toxic products safe for your family, pets, and landscaping

Our Services

Two simple options to keep your roof and gutters in top shape

Roof Cleaning

Complete moss treatment & gutter cleaning

$499 – $1,500 for most homes

Moss treatment, moss removal, and gutter cleaning all included. Backed by our 12-month moss-free guarantee.

Gutter Cleaning

Full clean with complimentary roof blow-off

Starting at $250

Complete gutter cleaning with hand-scooping, downspout flushing, and a complimentary roof blow-off to clear debris. No moss? This is all you need.

BEFORE

AFTER

Lake Washington waterfront — same roof, one visit.

Metal Roof Cleaning

Asphalt and composite roofs are our bread and butter, but we clean a lot of metal roofs too — they're everywhere in the Seattle area, and moss and algae love the seams and shaded panels just as much as shingles.

Metal takes a different approach. The surface is slick and easy to scratch or dent if you treat it like asphalt, so we use a gentler process: kill the moss at the root, brush and rinse the panels without aggressive pressure, and let the treatment finish the job. The result is a roof that looks close to new without damaging the finish.

Standing seam, corrugated & metal shake roofs
Finish-safe process — no harsh pressure on painted panels
Moss treatment included, same 12-month guarantee
Starting at $800 — quoted from your roof's size & condition

How It Works

Inspect

We assess your roof and gutters to recommend the right service level.

Treat

Our roof cleaning treatment removes moss and debris without damaging shingles.

Protect

Preventative treatment keeps moss away for 12 months, guaranteed.

Why Choose Seattle ProWash

No High Pressure on Roofs

Our soft-wash method is safe for all shingle types

Trained & Insured Technicians

Licensed professionals with proper safety equipment

Photos on Every Job

Clear before-and-after documentation of all work

Honest Advice & Maintenance

We recommend only what your roof actually needs

12-Month Moss-Free Guarantee

Your roof stays protected for a full year

Quick, Honest Scheduling

Same-day quotes, most jobs scheduled within 1–2 weeks

What Our Customers Say

"These guys did an amazing job cleaning up my roof. They did a great job not damaging anything and I would definitely hire them again down the line."

Daniel S.

Roof Cleaning

"Really happy with the work the Seattle Pro Wash team did to clean the transparent roof of my backyard pergola. Quick, friendly and efficient. Highly recommended!"

Aileen I.

Pergola Roof Cleaning